diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ad5b1af6e4..4f6ede477a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -1,5 +1,5 @@
 ###############################################################################
-#  Copyright (c) 2014-2020 libbitcoin-system developers (see COPYING).
+#  Copyright (c) 2014-2023 libbitcoin-system developers (see COPYING).
 #
 #         GENERATED SOURCE CODE, DO NOT EDIT EXCEPT EXPERIMENTALLY
 #
@@ -27,6 +27,7 @@ jobs:
             icu: ""
             cc: "clang"
             flags: "-Os -fPIE"
+            options: "--enable-isystem"
             packager: "apt"
             packages: ""
 
@@ -40,6 +41,7 @@ jobs:
             icu: "--build-icu --with-icu"
             cc: "clang"
             flags: "-Os -fPIE"
+            options: "--enable-isystem"
             packager: "apt"
             packages: ""
 
@@ -53,6 +55,7 @@ jobs:
             icu: ""
             cc: "gcc"
             flags: "-Os -fPIE"
+            options: "--enable-isystem"
             packager: "apt"
             packages: ""
 
@@ -66,6 +69,7 @@ jobs:
             icu: "--build-icu --with-icu"
             cc: "gcc"
             flags: "-Og -g --coverage -fPIE"
+            options: "--enable-isystem"
             packager: "apt"
             packages: "lcov"
 
@@ -79,6 +83,7 @@ jobs:
             icu: "--build-icu --with-icu"
             cc: "clang"
             flags: "-Os -fPIE"
+            options: "--enable-isystem"
             packager: "brew"
             packages: ""
 
@@ -92,6 +97,7 @@ jobs:
             icu: "--build-icu --with-icu"
             cc: "clang"
             flags: "-Os -fvisibility=hidden -fPIE"
+            options: "--enable-isystem"
             packager: "brew"
             packages: ""
 
@@ -143,11 +149,16 @@ jobs:
             echo "LDFLAGS=-Wl,-rpath,$WORKSPACE_SUBPATH/prefix/lib" >> $GITHUB_ENV
           fi
 
+      - name: Display CPU details
+        if: ${{ (runner.os == 'Linux') }}
+        shell: bash
+        run: |
+          lscpu
+
       - name: Execute install.sh
         run: >
           ./install.sh
-          --enable-isystem
-          --build-dir=$LIBBITCOIN_SRC_PATH
+          --build-dir=$LIBBITCOIN_SRC_PATH ${{ matrix.options }}
           --prefix=$LIBBITCOIN_SRC_PATH/prefix
           ${{ env.LINKAGE }}
           ${{ env.ASSERT_NDEBUG }}
@@ -200,11 +211,11 @@ jobs:
         run: |
           cat ${{ github.workspace }}/build/build-*/bootstrap.log
 
+
       - name: Failure display otool output
         if: ${{ failure() && (matrix.os == 'macos-latest') }}
         run: |
           otool -L ${{ github.workspace }}/test/.libs/libbitcoin-system-test
-
       - name: Failure display DYLD_PRINT_LIBRARIES
         if: ${{ failure() && (matrix.os == 'macos-latest') }}
         run: |
@@ -233,6 +244,7 @@ jobs:
             icu: ""
             cc: "clang"
             flags: "-Os -fPIE"
+            options: ""
             packager: "apt"
             packages: ""
 
@@ -246,6 +258,7 @@ jobs:
             icu: "--build-icu --with-icu"
             cc: "clang"
             flags: "-Os -fPIE"
+            options: ""
             packager: "apt"
             packages: ""
 
@@ -259,6 +272,7 @@ jobs:
             icu: ""
             cc: "gcc"
             flags: "-Os -fPIE"
+            options: ""
             packager: "apt"
             packages: ""
 
@@ -272,6 +286,7 @@ jobs:
             icu: "--build-icu --with-icu"
             cc: "gcc"
             flags: "-Og -fPIE"
+            options: ""
             packager: "apt"
             packages: ""
 
@@ -285,6 +300,7 @@ jobs:
             icu: "--build-icu --with-icu"
             cc: "clang"
             flags: "-Os -fPIE"
+            options: ""
             packager: "brew"
             packages: ""
 
@@ -298,6 +314,7 @@ jobs:
             icu: "--build-icu --with-icu"
             cc: "clang"
             flags: "-Os -fvisibility=hidden -fPIE"
+            options: ""
             packager: "brew"
             packages: ""
 
@@ -352,10 +369,16 @@ jobs:
             echo "LDFLAGS=-Wl,-rpath,$WORKSPACE_SUBPATH/prefix/lib" >> $GITHUB_ENV
           fi
 
+      - name: Display CPU details
+        if: ${{ (runner.os == 'Linux') }}
+        shell: bash
+        run: |
+          lscpu
+
       - name: Execute install-cmake.sh
         run: >
           ./install-cmake.sh
-          --build-dir=$LIBBITCOIN_SRC_PATH
+          --build-dir=$LIBBITCOIN_SRC_PATH ${{ matrix.options }}
           --prefix=$LIBBITCOIN_SRC_PATH/prefix
           ${{ env.LINKAGE }}
           ${{ env.ASSERT_NDEBUG }}
@@ -408,11 +431,11 @@ jobs:
         run: |
           cat ${{ github.workspace }}/build/build-*/bootstrap.log
 
+
       - name: Failure display otool output
         if: ${{ failure() && (matrix.os == 'macos-latest') }}
         run: |
           otool -L ${{ github.workspace }}/test/.libs/libbitcoin-system-test
-
       - name: Failure display DYLD_PRINT_LIBRARIES
         if: ${{ failure() && (matrix.os == 'macos-latest') }}
         run: |
@@ -452,6 +475,7 @@ jobs:
             icu: ""
             cc: "clang"
             flags: "-Os -fPIE"
+            options: ""
             packager: "apt"
             packages: ""
 
@@ -466,6 +490,7 @@ jobs:
             icu: "--build-icu --with-icu"
             cc: "clang"
             flags: "-Os -fPIE"
+            options: ""
             packager: "apt"
             packages: ""
 
@@ -480,6 +505,7 @@ jobs:
             icu: ""
             cc: "gcc"
             flags: "-Os -fPIE"
+            options: ""
             packager: "apt"
             packages: ""
 
@@ -534,10 +560,16 @@ jobs:
             echo "LDFLAGS=-Wl,-rpath,$WORKSPACE_SUBPATH/prefix/${{ matrix.preset }}/lib" >> $GITHUB_ENV
           fi
 
+      - name: Display CPU details
+        if: ${{ (runner.os == 'Linux') }}
+        shell: bash
+        run: |
+          lscpu
+
       - name: Execute install-cmakepresets.sh
         run: >
           ./install-cmakepresets.sh
-          --build-dir=$LIBBITCOIN_SRC_PATH
+          --build-dir=$LIBBITCOIN_SRC_PATH ${{ matrix.options }}
           --prefix=$LIBBITCOIN_SRC_PATH/prefix/${{ matrix.preset }}
           --preset=${{ matrix.preset }}
           ${{ env.LINKAGE }}
@@ -591,11 +623,11 @@ jobs:
         run: |
           cat ${{ github.workspace }}/build/build-*/bootstrap.log
 
+
       - name: Failure display otool output
         if: ${{ failure() && (matrix.os == 'macos-latest') }}
         run: |
           otool -L ${{ github.workspace }}/test/.libs/libbitcoin-system-test
-
       - name: Failure display DYLD_PRINT_LIBRARIES
         if: ${{ failure() && (matrix.os == 'macos-latest') }}
         run: |
@@ -652,6 +684,8 @@ jobs:
     steps:
       - name: Add msbuild to PATH
         uses: microsoft/setup-msbuild@v1.1
+        with:
+          msbuild-architecture: x64
 
       - name: Checkout repository
         uses: actions/checkout@v3
diff --git a/Makefile.am b/Makefile.am
index 50a062a0f2..abbc4c74b7 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1,5 +1,5 @@
 ###############################################################################
-#  Copyright (c) 2014-2020 libbitcoin-system developers (see COPYING).
+#  Copyright (c) 2014-2023 libbitcoin-system developers (see COPYING).
 #
 #         GENERATED SOURCE CODE, DO NOT EDIT EXCEPT EXPERIMENTALLY
 #
diff --git a/autogen.sh b/autogen.sh
index c8c661a3d1..65589d767f 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -1,6 +1,6 @@
 #!/bin/sh
 ###############################################################################
-#  Copyright (c) 2014-2020 libbitcoin-system developers (see COPYING).
+#  Copyright (c) 2014-2023 libbitcoin-system developers (see COPYING).
 #
 #         GENERATED SOURCE CODE, DO NOT EDIT EXCEPT EXPERIMENTALLY
 #
diff --git a/build.cmd b/build.cmd
index 6c92c1dad7..4b692a746a 100644
--- a/build.cmd
+++ b/build.cmd
@@ -1,5 +1,5 @@
 REM ###########################################################################
-REM #  Copyright (c) 2014-2020 libbitcoin-system developers (see COPYING).
+REM #  Copyright (c) 2014-2023 libbitcoin-system developers (see COPYING).
 REM #
 REM #         GENERATED SOURCE CODE, DO NOT EDIT EXCEPT EXPERIMENTALLY
 REM #
diff --git a/builds/cmake/CMakeLists.txt b/builds/cmake/CMakeLists.txt
index acae013dde..3a41f330e9 100644
--- a/builds/cmake/CMakeLists.txt
+++ b/builds/cmake/CMakeLists.txt
@@ -1,5 +1,5 @@
 ###############################################################################
-#  Copyright (c) 2014-2020 libbitcoin-system developers (see COPYING).
+#  Copyright (c) 2014-2023 libbitcoin-system developers (see COPYING).
 #
 #         GENERATED SOURCE CODE, DO NOT EDIT EXCEPT EXPERIMENTALLY
 #
@@ -16,6 +16,8 @@ enable_testing()
 list( APPEND CMAKE_MODULE_PATH "${PROJECT_SOURCE_DIR}/modules" )
 include(CheckIncludeFiles)
 include(CheckSymbolExists)
+include(CheckCXXCompilerFlag)
+include(CheckCXXSourceCompiles)
 
 set_property(GLOBAL PROPERTY USE_FOLDERS ON)
 
@@ -40,40 +42,95 @@ set( CMAKE_CXX_STANDARD_REQUIRED ON )
 # Add compiler options
 #------------------------------------------------------------------------------
 # Warn on all stuff.
-add_compile_options( "-Wall" )
+check_cxx_compiler_flag( "-Wall" HAS_FLAG_WALL )
+if ( HAS_FLAG_WALL )
+    add_compile_options( "-Wall" )
+else()
+    message( FATAL_ERROR "Compiler does not support -Wall" )
+endif()
 
 # Warn on extra stuff.
-add_compile_options( "-Wextra" )
+check_cxx_compiler_flag( "-Wextra" HAS_FLAG_WEXTRA )
+if ( HAS_FLAG_WEXTRA )
+    add_compile_options( "-Wextra" )
+else()
+    message( FATAL_ERROR "Compiler does not support -Wextra" )
+endif()
 
 # Be really annoying.
-add_compile_options( "-Wpedantic" )
+check_cxx_compiler_flag( "-Wpedantic" HAS_FLAG_WPEDANTIC )
+if ( HAS_FLAG_WPEDANTIC )
+    add_compile_options( "-Wpedantic" )
+else()
+    message( FATAL_ERROR "Compiler does not support -Wpedantic" )
+endif()
 
 # Disallow warning on style order of declarations.
-add_compile_options( "-Wno-reorder" )
+check_cxx_compiler_flag( "-Wno-reorder" HAS_FLAG_WNO-REORDER )
+if ( HAS_FLAG_WNO-REORDER )
+    add_compile_options( "-Wno-reorder" )
+else()
+    message( FATAL_ERROR "Compiler does not support -Wno-reorder" )
+endif()
 
 # Suppress warning for incomplete field initialization.
-add_compile_options( "-Wno-missing-field-initializers" )
+check_cxx_compiler_flag( "-Wno-missing-field-initializers" HAS_FLAG_WNO-MISSING-FIELD-INITIALIZERS )
+if ( HAS_FLAG_WNO-MISSING-FIELD-INITIALIZERS )
+    add_compile_options( "-Wno-missing-field-initializers" )
+else()
+    message( FATAL_ERROR "Compiler does not support -Wno-missing-field-initializers" )
+endif()
 
 # Conform to style.
-add_compile_options( "-Wno-missing-braces" )
+check_cxx_compiler_flag( "-Wno-missing-braces" HAS_FLAG_WNO-MISSING-BRACES )
+if ( HAS_FLAG_WNO-MISSING-BRACES )
+    add_compile_options( "-Wno-missing-braces" )
+else()
+    message( FATAL_ERROR "Compiler does not support -Wno-missing-braces" )
+endif()
 
 # Ignore comments within comments or commenting of backslash extended lines.
-add_compile_options( "-Wno-comment" )
+check_cxx_compiler_flag( "-Wno-comment" HAS_FLAG_WNO-COMMENT )
+if ( HAS_FLAG_WNO-COMMENT )
+    add_compile_options( "-Wno-comment" )
+else()
+    message( FATAL_ERROR "Compiler does not support -Wno-comment" )
+endif()
 
 # Suppress warning for copy of implicitly generated copy constructor.
-add_compile_options( "-Wno-deprecated-copy" )
+check_cxx_compiler_flag( "-Wno-deprecated-copy" HAS_FLAG_WNO-DEPRECATED-COPY )
+if ( HAS_FLAG_WNO-DEPRECATED-COPY )
+    add_compile_options( "-Wno-deprecated-copy" )
+else()
+    message( FATAL_ERROR "Compiler does not support -Wno-deprecated-copy" )
+endif()
 
 # Allow use of C99 'long long' type.
-add_compile_options( "-Wno-long-long" )
+check_cxx_compiler_flag( "-Wno-long-long" HAS_FLAG_WNO-LONG-LONG )
+if ( HAS_FLAG_WNO-LONG-LONG )
+    add_compile_options( "-Wno-long-long" )
+else()
+    message( FATAL_ERROR "Compiler does not support -Wno-long-long" )
+endif()
 
 # Conflict in stdlib under clang.
 if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
-    add_compile_options( "-Wno-mismatched-tags" )
+    check_cxx_compiler_flag( "-Wno-mismatched-tags" HAS_FLAG_WNO-MISMATCHED-TAGS )
+    if ( HAS_FLAG_WNO-MISMATCHED-TAGS )
+        add_compile_options( "-Wno-mismatched-tags" )
+    else()
+        message( FATAL_ERROR "Compiler does not support -Wno-mismatched-tags" )
+    endif()
 endif()
 
 # Limit delays and warnings.
 if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
-    add_compile_options( "-fno-var-tracking-assignments" )
+    check_cxx_compiler_flag( "-fno-var-tracking-assignments" HAS_FLAG_FNO-VAR-TRACKING-ASSIGNMENTS )
+    if ( HAS_FLAG_FNO-VAR-TRACKING-ASSIGNMENTS )
+        add_compile_options( "-fno-var-tracking-assignments" )
+    else()
+        message( FATAL_ERROR "Compiler does not support -fno-var-tracking-assignments" )
+    endif()
 endif()
 
 # Implement -Dpkgconfigdir and output ${pkgconfigdir}.
diff --git a/builds/cmake/modules/FindDl.cmake b/builds/cmake/modules/FindDl.cmake
index 0ea1cb3d85..b152924fe0 100644
--- a/builds/cmake/modules/FindDl.cmake
+++ b/builds/cmake/modules/FindDl.cmake
@@ -1,5 +1,5 @@
 ###############################################################################
-#  Copyright (c) 2014-2020 libbitcoin developers (see COPYING).
+#  Copyright (c) 2014-2023 libbitcoin developers (see COPYING).
 #
 ###############################################################################
 # Finddl
diff --git a/builds/cmake/modules/FindIcu-I18N.cmake b/builds/cmake/modules/FindIcu-I18N.cmake
index 6a8bef2822..7f7e14449e 100644
--- a/builds/cmake/modules/FindIcu-I18N.cmake
+++ b/builds/cmake/modules/FindIcu-I18N.cmake
@@ -1,5 +1,5 @@
 ###############################################################################
-#  Copyright (c) 2014-2020 libbitcoin developers (see COPYING).
+#  Copyright (c) 2014-2023 libbitcoin developers (see COPYING).
 #
 #         GENERATED SOURCE CODE, DO NOT EDIT EXCEPT EXPERIMENTALLY
 #
diff --git a/builds/cmake/modules/FindRt.cmake b/builds/cmake/modules/FindRt.cmake
index 2859c2a66f..2afa7f67a7 100644
--- a/builds/cmake/modules/FindRt.cmake
+++ b/builds/cmake/modules/FindRt.cmake
@@ -1,5 +1,5 @@
 ###############################################################################
-#  Copyright (c) 2014-2020 libbitcoin developers (see COPYING).
+#  Copyright (c) 2014-2023 libbitcoin developers (see COPYING).
 #
 ###############################################################################
 # Findrt
diff --git a/builds/cmake/modules/FindSecp256K1.cmake b/builds/cmake/modules/FindSecp256K1.cmake
index 78d312857f..c710360ab4 100644
--- a/builds/cmake/modules/FindSecp256K1.cmake
+++ b/builds/cmake/modules/FindSecp256K1.cmake
@@ -1,5 +1,5 @@
 ###############################################################################
-#  Copyright (c) 2014-2020 libbitcoin-consensus developers (see COPYING).
+#  Copyright (c) 2014-2023 libbitcoin-consensus developers (see COPYING).
 #
 #         GENERATED SOURCE CODE, DO NOT EDIT EXCEPT EXPERIMENTALLY
 #
diff --git a/builds/msvc/debug.natvis b/builds/msvc/debug.natvis
index 1f56d5adc0..55fec18ed3 100644
--- a/builds/msvc/debug.natvis
+++ b/builds/msvc/debug.natvis
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!--
- |  Copyright (c) 2014-2021 libbitcoin-system developers (see COPYING).
+ |  Copyright (c) 2014-2023 libbitcoin-system developers (see COPYING).
  |
  |         GENERATED SOURCE CODE, DO NOT EDIT EXCEPT EXPERIMENTALLY
  |
diff --git a/builds/msvc/vs2022/libbitcoin-system-examples/libbitcoin-system-examples.vcxproj b/builds/msvc/vs2022/libbitcoin-system-examples/libbitcoin-system-examples.vcxproj
index 15509b2666..42d864b37f 100644
--- a/builds/msvc/vs2022/libbitcoin-system-examples/libbitcoin-system-examples.vcxproj
+++ b/builds/msvc/vs2022/libbitcoin-system-examples/libbitcoin-system-examples.vcxproj
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!--
- |  Copyright (c) 2014-2021 libbitcoin-system developers (see COPYING).
+ |  Copyright (c) 2014-2023 libbitcoin-system developers (see COPYING).
  |
  |         GENERATED SOURCE CODE, DO NOT EDIT EXCEPT EXPERIMENTALLY
  |
diff --git a/builds/msvc/vs2022/libbitcoin-system-examples/libbitcoin-system-examples.vcxproj.filters b/builds/msvc/vs2022/libbitcoin-system-examples/libbitcoin-system-examples.vcxproj.filters
index a85c359ae5..c2c4d91045 100644
--- a/builds/msvc/vs2022/libbitcoin-system-examples/libbitcoin-system-examples.vcxproj.filters
+++ b/builds/msvc/vs2022/libbitcoin-system-examples/libbitcoin-system-examples.vcxproj.filters
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!--
- |  Copyright (c) 2014-2021 libbitcoin-system developers (see COPYING).
+ |  Copyright (c) 2014-2023 libbitcoin-system developers (see COPYING).
  |
  |         GENERATED SOURCE CODE, DO NOT EDIT EXCEPT EXPERIMENTALLY
  |
diff --git a/builds/msvc/vs2022/libbitcoin-system-examples/packages.config b/builds/msvc/vs2022/libbitcoin-system-examples/packages.config
index 9ddc403c54..e4466ab7b8 100644
--- a/builds/msvc/vs2022/libbitcoin-system-examples/packages.config
+++ b/builds/msvc/vs2022/libbitcoin-system-examples/packages.config
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!--
- |  Copyright (c) 2014-2021 libbitcoin-system developers (see COPYING).
+ |  Copyright (c) 2014-2023 libbitcoin-system developers (see COPYING).
  |
  |         GENERATED SOURCE CODE, DO NOT EDIT EXCEPT EXPERIMENTALLY
  |
diff --git a/builds/msvc/vs2022/libbitcoin-system-test/libbitcoin-system-test.vcxproj b/builds/msvc/vs2022/libbitcoin-system-test/libbitcoin-system-test.vcxproj
index 1c3f099443..e2e078872d 100644
--- a/builds/msvc/vs2022/libbitcoin-system-test/libbitcoin-system-test.vcxproj
+++ b/builds/msvc/vs2022/libbitcoin-system-test/libbitcoin-system-test.vcxproj
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!--
- |  Copyright (c) 2014-2021 libbitcoin-system developers (see COPYING).
+ |  Copyright (c) 2014-2023 libbitcoin-system developers (see COPYING).
  |
  |         GENERATED SOURCE CODE, DO NOT EDIT EXCEPT EXPERIMENTALLY
  |
diff --git a/builds/msvc/vs2022/libbitcoin-system-test/libbitcoin-system-test.vcxproj.filters b/builds/msvc/vs2022/libbitcoin-system-test/libbitcoin-system-test.vcxproj.filters
index 8396025b84..4ca0bafdb5 100644
--- a/builds/msvc/vs2022/libbitcoin-system-test/libbitcoin-system-test.vcxproj.filters
+++ b/builds/msvc/vs2022/libbitcoin-system-test/libbitcoin-system-test.vcxproj.filters
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!--
- |  Copyright (c) 2014-2021 libbitcoin-system developers (see COPYING).
+ |  Copyright (c) 2014-2023 libbitcoin-system developers (see COPYING).
  |
  |         GENERATED SOURCE CODE, DO NOT EDIT EXCEPT EXPERIMENTALLY
  |
diff --git a/builds/msvc/vs2022/libbitcoin-system-test/packages.config b/builds/msvc/vs2022/libbitcoin-system-test/packages.config
index 5e77e855ab..ab01053cef 100644
--- a/builds/msvc/vs2022/libbitcoin-system-test/packages.config
+++ b/builds/msvc/vs2022/libbitcoin-system-test/packages.config
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!--
- |  Copyright (c) 2014-2021 libbitcoin-system developers (see COPYING).
+ |  Copyright (c) 2014-2023 libbitcoin-system developers (see COPYING).
  |
  |         GENERATED SOURCE CODE, DO NOT EDIT EXCEPT EXPERIMENTALLY
  |
diff --git a/builds/msvc/vs2022/libbitcoin-system/libbitcoin-system.vcxproj b/builds/msvc/vs2022/libbitcoin-system/libbitcoin-system.vcxproj
index f653ff2e5c..427da03a72 100644
--- a/builds/msvc/vs2022/libbitcoin-system/libbitcoin-system.vcxproj
+++ b/builds/msvc/vs2022/libbitcoin-system/libbitcoin-system.vcxproj
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!--
- |  Copyright (c) 2014-2021 libbitcoin-system developers (see COPYING).
+ |  Copyright (c) 2014-2023 libbitcoin-system developers (see COPYING).
  |
  |         GENERATED SOURCE CODE, DO NOT EDIT EXCEPT EXPERIMENTALLY
  |
diff --git a/builds/msvc/vs2022/libbitcoin-system/libbitcoin-system.vcxproj.filters b/builds/msvc/vs2022/libbitcoin-system/libbitcoin-system.vcxproj.filters
index 88390446bf..816eed6c4e 100644
--- a/builds/msvc/vs2022/libbitcoin-system/libbitcoin-system.vcxproj.filters
+++ b/builds/msvc/vs2022/libbitcoin-system/libbitcoin-system.vcxproj.filters
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!--
- |  Copyright (c) 2014-2021 libbitcoin-system developers (see COPYING).
+ |  Copyright (c) 2014-2023 libbitcoin-system developers (see COPYING).
  |
  |         GENERATED SOURCE CODE, DO NOT EDIT EXCEPT EXPERIMENTALLY
  |
diff --git a/builds/msvc/vs2022/libbitcoin-system/packages.config b/builds/msvc/vs2022/libbitcoin-system/packages.config
index 9ddc403c54..e4466ab7b8 100644
--- a/builds/msvc/vs2022/libbitcoin-system/packages.config
+++ b/builds/msvc/vs2022/libbitcoin-system/packages.config
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!--
- |  Copyright (c) 2014-2021 libbitcoin-system developers (see COPYING).
+ |  Copyright (c) 2014-2023 libbitcoin-system developers (see COPYING).
  |
  |         GENERATED SOURCE CODE, DO NOT EDIT EXCEPT EXPERIMENTALLY
  |
diff --git a/configure.ac b/configure.ac
index 980344165a..5237b04390 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,5 +1,5 @@
 ###############################################################################
-#  Copyright (c) 2014-2020 libbitcoin-system developers (see COPYING).
+#  Copyright (c) 2014-2023 libbitcoin-system developers (see COPYING).
 #
 #         GENERATED SOURCE CODE, DO NOT EDIT EXCEPT EXPERIMENTALLY
 #
@@ -147,6 +147,115 @@ AC_ARG_ENABLE([isystem],
 AC_MSG_RESULT([$enable_isystem])
 
 
+# Set flags.
+#==============================================================================
+# Require c++11 for all c++ products.
+#------------------------------------------------------------------------------
+AS_CASE([${CC}], [*],
+    [AX_CHECK_COMPILE_FLAG([-std=c++11],
+        [CXXFLAGS="$CXXFLAGS -std=c++11"])])
+
+# Warn on all stuff.
+#------------------------------------------------------------------------------
+AS_CASE([${CC}], [*],
+    [AX_CHECK_COMPILE_FLAG([-Wall],
+        [CFLAGS="$CFLAGS -Wall"])])
+
+# Warn on all stuff.
+#------------------------------------------------------------------------------
+AS_CASE([${CC}], [*],
+    [AX_CHECK_COMPILE_FLAG([-Wall],
+        [CXXFLAGS="$CXXFLAGS -Wall"])])
+
+# Warn on extra stuff.
+#------------------------------------------------------------------------------
+AS_CASE([${CC}], [*],
+    [AX_CHECK_COMPILE_FLAG([-Wextra],
+        [CFLAGS="$CFLAGS -Wextra"])])
+
+# Warn on extra stuff.
+#------------------------------------------------------------------------------
+AS_CASE([${CC}], [*],
+    [AX_CHECK_COMPILE_FLAG([-Wextra],
+        [CXXFLAGS="$CXXFLAGS -Wextra"])])
+
+# Be really annoying.
+#------------------------------------------------------------------------------
+AS_CASE([${CC}], [*],
+    [AX_CHECK_COMPILE_FLAG([-Wpedantic],
+        [CFLAGS="$CFLAGS -Wpedantic"],
+        [AX_CHECK_COMPILE_FLAG([-pedantic],
+            [CFLAGS="$CFLAGS -pedantic"])])])
+
+# Be really annoying.
+#------------------------------------------------------------------------------
+AS_CASE([${CC}], [*],
+    [AX_CHECK_COMPILE_FLAG([-Wpedantic],
+        [CXXFLAGS="$CXXFLAGS -Wpedantic"],
+        [AX_CHECK_COMPILE_FLAG([-pedantic],
+            [CXXFLAGS="$CXXFLAGS -pedantic"])])])
+
+# Disallow warning on style order of declarations.
+#------------------------------------------------------------------------------
+AS_CASE([${CC}], [*],
+    [AX_CHECK_COMPILE_FLAG([-Wno-reorder],
+        [CXXFLAGS="$CXXFLAGS -Wno-reorder"])])
+
+# Suppress warning for incomplete field initialization.
+#------------------------------------------------------------------------------
+AS_CASE([${CC}], [*],
+    [AX_CHECK_COMPILE_FLAG([-Wno-missing-field-initializers],
+        [CXXFLAGS="$CXXFLAGS -Wno-missing-field-initializers"])])
+
+# Conform to style.
+#------------------------------------------------------------------------------
+AS_CASE([${CC}], [*],
+    [AX_CHECK_COMPILE_FLAG([-Wno-missing-braces],
+        [CXXFLAGS="$CXXFLAGS -Wno-missing-braces"])])
+
+# Ignore comments within comments or commenting of backslash extended lines.
+#------------------------------------------------------------------------------
+AS_CASE([${CC}], [*],
+    [AX_CHECK_COMPILE_FLAG([-Wno-comment],
+        [CXXFLAGS="$CXXFLAGS -Wno-comment"])])
+
+# Suppress warning for copy of implicitly generated copy constructor.
+#------------------------------------------------------------------------------
+AS_CASE([${CC}], [*],
+    [AX_CHECK_COMPILE_FLAG([-Wno-deprecated-copy],
+        [CXXFLAGS="$CXXFLAGS -Wno-deprecated-copy"])])
+
+# Conflict in stdlib under clang. Enabled in clang only.
+#------------------------------------------------------------------------------
+AS_CASE([${CC}], [*clang*],
+    [AX_CHECK_COMPILE_FLAG([-Wno-mismatched-tags],
+        [CXXFLAGS="$CXXFLAGS -Wno-mismatched-tags"])])
+
+# Protect stack.
+#------------------------------------------------------------------------------
+AS_CASE([${CC}], [*],
+    [AX_CHECK_LINK_FLAG([-fstack-protector],
+        [LDFLAGS="$LDFLAGS -fstack-protector"])])
+
+# Protect stack comprehensively.
+#------------------------------------------------------------------------------
+AS_CASE([${CC}], [*],
+    [AX_CHECK_LINK_FLAG([-fstack-protector-all],
+        [LDFLAGS="$LDFLAGS -fstack-protector-all"])])
+
+# Allow use of C99 'long long' type.
+#------------------------------------------------------------------------------
+AS_CASE([${CC}], [*],
+    [AX_CHECK_COMPILE_FLAG([-Wno-long-long],
+        [CFLAGS="$CFLAGS -Wno-long-long"])])
+
+# Limit delays and warnings. Enabled in gcc only.
+#------------------------------------------------------------------------------
+AS_CASE([${CC}], [*gcc*],
+    [AX_CHECK_COMPILE_FLAG([-fno-var-tracking-assignments],
+        [CXXFLAGS="$CXXFLAGS -fno-var-tracking-assignments"])])
+
+
 # Check dependencies.
 #==============================================================================
 # Require Boost of at least version 1.72.0 and output ${boost_CPPFLAGS/LDFLAGS}.
@@ -314,115 +423,6 @@ AS_CASE([${enable_isystem}],[yes],
 AC_MSG_NOTICE([secp256k1_BUILD_CPPFLAGS : ${secp256k1_BUILD_CPPFLAGS}])
 
 
-# Set flags.
-#==============================================================================
-# Require c++11 for all c++ products.
-#------------------------------------------------------------------------------
-AS_CASE([${CC}], [*],
-    [AX_CHECK_COMPILE_FLAG([-std=c++11],
-        [CXXFLAGS="$CXXFLAGS -std=c++11"])])
-
-# Warn on all stuff.
-#------------------------------------------------------------------------------
-AS_CASE([${CC}], [*],
-    [AX_CHECK_COMPILE_FLAG([-Wall],
-        [CFLAGS="$CFLAGS -Wall"])])
-
-# Warn on all stuff.
-#------------------------------------------------------------------------------
-AS_CASE([${CC}], [*],
-    [AX_CHECK_COMPILE_FLAG([-Wall],
-        [CXXFLAGS="$CXXFLAGS -Wall"])])
-
-# Warn on extra stuff.
-#------------------------------------------------------------------------------
-AS_CASE([${CC}], [*],
-    [AX_CHECK_COMPILE_FLAG([-Wextra],
-        [CFLAGS="$CFLAGS -Wextra"])])
-
-# Warn on extra stuff.
-#------------------------------------------------------------------------------
-AS_CASE([${CC}], [*],
-    [AX_CHECK_COMPILE_FLAG([-Wextra],
-        [CXXFLAGS="$CXXFLAGS -Wextra"])])
-
-# Be really annoying.
-#------------------------------------------------------------------------------
-AS_CASE([${CC}], [*],
-    [AX_CHECK_COMPILE_FLAG([-Wpedantic],
-        [CFLAGS="$CFLAGS -Wpedantic"],
-        [AX_CHECK_COMPILE_FLAG([-pedantic],
-            [CFLAGS="$CFLAGS -pedantic"])])])
-
-# Be really annoying.
-#------------------------------------------------------------------------------
-AS_CASE([${CC}], [*],
-    [AX_CHECK_COMPILE_FLAG([-Wpedantic],
-        [CXXFLAGS="$CXXFLAGS -Wpedantic"],
-        [AX_CHECK_COMPILE_FLAG([-pedantic],
-            [CXXFLAGS="$CXXFLAGS -pedantic"])])])
-
-# Disallow warning on style order of declarations.
-#------------------------------------------------------------------------------
-AS_CASE([${CC}], [*],
-    [AX_CHECK_COMPILE_FLAG([-Wno-reorder],
-        [CXXFLAGS="$CXXFLAGS -Wno-reorder"])])
-
-# Suppress warning for incomplete field initialization.
-#------------------------------------------------------------------------------
-AS_CASE([${CC}], [*],
-    [AX_CHECK_COMPILE_FLAG([-Wno-missing-field-initializers],
-        [CXXFLAGS="$CXXFLAGS -Wno-missing-field-initializers"])])
-
-# Conform to style.
-#------------------------------------------------------------------------------
-AS_CASE([${CC}], [*],
-    [AX_CHECK_COMPILE_FLAG([-Wno-missing-braces],
-        [CXXFLAGS="$CXXFLAGS -Wno-missing-braces"])])
-
-# Ignore comments within comments or commenting of backslash extended lines.
-#------------------------------------------------------------------------------
-AS_CASE([${CC}], [*],
-    [AX_CHECK_COMPILE_FLAG([-Wno-comment],
-        [CXXFLAGS="$CXXFLAGS -Wno-comment"])])
-
-# Suppress warning for copy of implicitly generated copy constructor.
-#------------------------------------------------------------------------------
-AS_CASE([${CC}], [*],
-    [AX_CHECK_COMPILE_FLAG([-Wno-deprecated-copy],
-        [CXXFLAGS="$CXXFLAGS -Wno-deprecated-copy"])])
-
-# Conflict in stdlib under clang. Enabled in clang only.
-#------------------------------------------------------------------------------
-AS_CASE([${CC}], [*clang*],
-    [AX_CHECK_COMPILE_FLAG([-Wno-mismatched-tags],
-        [CXXFLAGS="$CXXFLAGS -Wno-mismatched-tags"])])
-
-# Protect stack.
-#------------------------------------------------------------------------------
-AS_CASE([${CC}], [*],
-    [AX_CHECK_LINK_FLAG([-fstack-protector],
-        [LDFLAGS="$LDFLAGS -fstack-protector"])])
-
-# Protect stack comprehensively.
-#------------------------------------------------------------------------------
-AS_CASE([${CC}], [*],
-    [AX_CHECK_LINK_FLAG([-fstack-protector-all],
-        [LDFLAGS="$LDFLAGS -fstack-protector-all"])])
-
-# Allow use of C99 'long long' type.
-#------------------------------------------------------------------------------
-AS_CASE([${CC}], [*],
-    [AX_CHECK_COMPILE_FLAG([-Wno-long-long],
-        [CFLAGS="$CFLAGS -Wno-long-long"])])
-
-# Limit delays and warnings. Enabled in gcc only.
-#------------------------------------------------------------------------------
-AS_CASE([${CC}], [*gcc*],
-    [AX_CHECK_COMPILE_FLAG([-fno-var-tracking-assignments],
-        [CXXFLAGS="$CXXFLAGS -fno-var-tracking-assignments"])])
-
-
 # Process outputs into templates.
 #==============================================================================
 AC_CONFIG_FILES([Makefile libbitcoin-system.pc])
diff --git a/examples/main.cpp b/examples/main.cpp
index fe314330e0..dbcf3acdc1 100644
--- a/examples/main.cpp
+++ b/examples/main.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system.hpp b/include/bitcoin/system.hpp
index fb61ba85b0..50f9733ec0 100644
--- a/include/bitcoin/system.hpp
+++ b/include/bitcoin/system.hpp
@@ -1,5 +1,5 @@
 ///////////////////////////////////////////////////////////////////////////////
-// Copyright (c) 2014-2021 libbitcoin-system developers (see COPYING).
+// Copyright (c) 2014-2023 libbitcoin-system developers (see COPYING).
 //
 //        GENERATED SOURCE CODE, DO NOT EDIT EXCEPT EXPERIMENTALLY
 //
diff --git a/include/bitcoin/system/chain/block.hpp b/include/bitcoin/system/chain/block.hpp
index e3afb229a4..b5d872d6d2 100644
--- a/include/bitcoin/system/chain/block.hpp
+++ b/include/bitcoin/system/chain/block.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/chain/chain_state.hpp b/include/bitcoin/system/chain/chain_state.hpp
index d6eac63a52..76829ad357 100644
--- a/include/bitcoin/system/chain/chain_state.hpp
+++ b/include/bitcoin/system/chain/chain_state.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/chain/compact.hpp b/include/bitcoin/system/chain/compact.hpp
index 92e34ee430..0aa82e3c4d 100644
--- a/include/bitcoin/system/chain/compact.hpp
+++ b/include/bitcoin/system/chain/compact.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/chain/header.hpp b/include/bitcoin/system/chain/header.hpp
index 105d1eeb46..5c7e8c9bfb 100644
--- a/include/bitcoin/system/chain/header.hpp
+++ b/include/bitcoin/system/chain/header.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/chain/history.hpp b/include/bitcoin/system/chain/history.hpp
index 7d3bac3b0c..f94a78c8ef 100644
--- a/include/bitcoin/system/chain/history.hpp
+++ b/include/bitcoin/system/chain/history.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/chain/input.hpp b/include/bitcoin/system/chain/input.hpp
index cfd44d5f09..9fa5d7282d 100644
--- a/include/bitcoin/system/chain/input.hpp
+++ b/include/bitcoin/system/chain/input.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/chain/input_point.hpp b/include/bitcoin/system/chain/input_point.hpp
index 636995daa8..cfa528ba31 100644
--- a/include/bitcoin/system/chain/input_point.hpp
+++ b/include/bitcoin/system/chain/input_point.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/chain/output.hpp b/include/bitcoin/system/chain/output.hpp
index 22d7ac316d..caba440ed5 100644
--- a/include/bitcoin/system/chain/output.hpp
+++ b/include/bitcoin/system/chain/output.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/chain/output_point.hpp b/include/bitcoin/system/chain/output_point.hpp
index c8c20f442b..4396605af0 100644
--- a/include/bitcoin/system/chain/output_point.hpp
+++ b/include/bitcoin/system/chain/output_point.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/chain/point.hpp b/include/bitcoin/system/chain/point.hpp
index 0acd0d048c..d8c4d8fb40 100644
--- a/include/bitcoin/system/chain/point.hpp
+++ b/include/bitcoin/system/chain/point.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/chain/point_iterator.hpp b/include/bitcoin/system/chain/point_iterator.hpp
index ad22c719dc..703e5ba991 100644
--- a/include/bitcoin/system/chain/point_iterator.hpp
+++ b/include/bitcoin/system/chain/point_iterator.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/chain/point_value.hpp b/include/bitcoin/system/chain/point_value.hpp
index d2047ab683..097bc31d8c 100644
--- a/include/bitcoin/system/chain/point_value.hpp
+++ b/include/bitcoin/system/chain/point_value.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/chain/points_value.hpp b/include/bitcoin/system/chain/points_value.hpp
index ea2708a4f6..e28c4e06a9 100644
--- a/include/bitcoin/system/chain/points_value.hpp
+++ b/include/bitcoin/system/chain/points_value.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/chain/script.hpp b/include/bitcoin/system/chain/script.hpp
index 8b3c81a244..f7928d24f0 100644
--- a/include/bitcoin/system/chain/script.hpp
+++ b/include/bitcoin/system/chain/script.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/chain/stealth.hpp b/include/bitcoin/system/chain/stealth.hpp
index b9f8ed392e..2aff5152ad 100644
--- a/include/bitcoin/system/chain/stealth.hpp
+++ b/include/bitcoin/system/chain/stealth.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/chain/transaction.hpp b/include/bitcoin/system/chain/transaction.hpp
index 59c247e4bc..fc38b46a06 100644
--- a/include/bitcoin/system/chain/transaction.hpp
+++ b/include/bitcoin/system/chain/transaction.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/chain/witness.hpp b/include/bitcoin/system/chain/witness.hpp
index 340e99f646..3fd7a78745 100644
--- a/include/bitcoin/system/chain/witness.hpp
+++ b/include/bitcoin/system/chain/witness.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/compat.h b/include/bitcoin/system/compat.h
index ae335412f5..8fe75fd83a 100644
--- a/include/bitcoin/system/compat.h
+++ b/include/bitcoin/system/compat.h
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/compat.hpp b/include/bitcoin/system/compat.hpp
index 7e83c5dec3..7ec7425c9a 100644
--- a/include/bitcoin/system/compat.hpp
+++ b/include/bitcoin/system/compat.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/config/authority.hpp b/include/bitcoin/system/config/authority.hpp
index 008b803f86..4d36656139 100644
--- a/include/bitcoin/system/config/authority.hpp
+++ b/include/bitcoin/system/config/authority.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/config/base16.hpp b/include/bitcoin/system/config/base16.hpp
index 79ab745432..4b5cf5b6fb 100644
--- a/include/bitcoin/system/config/base16.hpp
+++ b/include/bitcoin/system/config/base16.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/config/base2.hpp b/include/bitcoin/system/config/base2.hpp
index 495741cbb4..52939cda8c 100644
--- a/include/bitcoin/system/config/base2.hpp
+++ b/include/bitcoin/system/config/base2.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/config/base58.hpp b/include/bitcoin/system/config/base58.hpp
index a08ffc4690..6998a067db 100644
--- a/include/bitcoin/system/config/base58.hpp
+++ b/include/bitcoin/system/config/base58.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/config/base64.hpp b/include/bitcoin/system/config/base64.hpp
index 96ba7309b2..3468b69f23 100644
--- a/include/bitcoin/system/config/base64.hpp
+++ b/include/bitcoin/system/config/base64.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/config/checkpoint.hpp b/include/bitcoin/system/config/checkpoint.hpp
index 296cc1800a..611e28d699 100644
--- a/include/bitcoin/system/config/checkpoint.hpp
+++ b/include/bitcoin/system/config/checkpoint.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/config/directory.hpp b/include/bitcoin/system/config/directory.hpp
index 369b95993b..fbdaebe154 100644
--- a/include/bitcoin/system/config/directory.hpp
+++ b/include/bitcoin/system/config/directory.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/config/endpoint.hpp b/include/bitcoin/system/config/endpoint.hpp
index 8c94894a0c..26593057da 100644
--- a/include/bitcoin/system/config/endpoint.hpp
+++ b/include/bitcoin/system/config/endpoint.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/config/hash160.hpp b/include/bitcoin/system/config/hash160.hpp
index 920ac012be..063b561e48 100644
--- a/include/bitcoin/system/config/hash160.hpp
+++ b/include/bitcoin/system/config/hash160.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/config/hash256.hpp b/include/bitcoin/system/config/hash256.hpp
index f2e82c0b60..34610d0882 100644
--- a/include/bitcoin/system/config/hash256.hpp
+++ b/include/bitcoin/system/config/hash256.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/config/parameter.hpp b/include/bitcoin/system/config/parameter.hpp
index dd53d5a260..22e0d0cedd 100644
--- a/include/bitcoin/system/config/parameter.hpp
+++ b/include/bitcoin/system/config/parameter.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/config/parser.hpp b/include/bitcoin/system/config/parser.hpp
index 796db872e8..e81e2f9d43 100644
--- a/include/bitcoin/system/config/parser.hpp
+++ b/include/bitcoin/system/config/parser.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/config/printer.hpp b/include/bitcoin/system/config/printer.hpp
index 0977242369..0f00ff4da5 100644
--- a/include/bitcoin/system/config/printer.hpp
+++ b/include/bitcoin/system/config/printer.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/config/settings.hpp b/include/bitcoin/system/config/settings.hpp
index f6fec6dcb0..aa4f4d6b59 100644
--- a/include/bitcoin/system/config/settings.hpp
+++ b/include/bitcoin/system/config/settings.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/config/sodium.hpp b/include/bitcoin/system/config/sodium.hpp
index d42e1b7922..d5c5d18b77 100644
--- a/include/bitcoin/system/config/sodium.hpp
+++ b/include/bitcoin/system/config/sodium.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/constants.hpp b/include/bitcoin/system/constants.hpp
index 8ec74aeac8..ee49114dc0 100644
--- a/include/bitcoin/system/constants.hpp
+++ b/include/bitcoin/system/constants.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/define.hpp b/include/bitcoin/system/define.hpp
index 8d46733f6e..004dec8c13 100644
--- a/include/bitcoin/system/define.hpp
+++ b/include/bitcoin/system/define.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/error.hpp b/include/bitcoin/system/error.hpp
index 3367df4da4..0d20f5f43b 100644
--- a/include/bitcoin/system/error.hpp
+++ b/include/bitcoin/system/error.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/formats/base_10.hpp b/include/bitcoin/system/formats/base_10.hpp
index c9fd5a385a..e934e9921e 100644
--- a/include/bitcoin/system/formats/base_10.hpp
+++ b/include/bitcoin/system/formats/base_10.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/formats/base_16.hpp b/include/bitcoin/system/formats/base_16.hpp
index 7aff2e2f17..c9a75e09d5 100644
--- a/include/bitcoin/system/formats/base_16.hpp
+++ b/include/bitcoin/system/formats/base_16.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/formats/base_58.hpp b/include/bitcoin/system/formats/base_58.hpp
index 9ddb4a9a7b..0f4cdf2531 100644
--- a/include/bitcoin/system/formats/base_58.hpp
+++ b/include/bitcoin/system/formats/base_58.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/formats/base_64.hpp b/include/bitcoin/system/formats/base_64.hpp
index ec659be943..f7c5789182 100644
--- a/include/bitcoin/system/formats/base_64.hpp
+++ b/include/bitcoin/system/formats/base_64.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/formats/base_85.hpp b/include/bitcoin/system/formats/base_85.hpp
index c25cc3aff7..644ba5f071 100644
--- a/include/bitcoin/system/formats/base_85.hpp
+++ b/include/bitcoin/system/formats/base_85.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/handlers.hpp b/include/bitcoin/system/handlers.hpp
index 670d13ee33..c2170e5be5 100644
--- a/include/bitcoin/system/handlers.hpp
+++ b/include/bitcoin/system/handlers.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/impl/formats/base_16.ipp b/include/bitcoin/system/impl/formats/base_16.ipp
index c61b1999f7..4b9e8beb5b 100644
--- a/include/bitcoin/system/impl/formats/base_16.ipp
+++ b/include/bitcoin/system/impl/formats/base_16.ipp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/impl/formats/base_58.ipp b/include/bitcoin/system/impl/formats/base_58.ipp
index 8cf6f7babe..550eaa2066 100644
--- a/include/bitcoin/system/impl/formats/base_58.ipp
+++ b/include/bitcoin/system/impl/formats/base_58.ipp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/impl/log/features/counter.ipp b/include/bitcoin/system/impl/log/features/counter.ipp
index f9ef7dbd3c..06d70a7925 100644
--- a/include/bitcoin/system/impl/log/features/counter.ipp
+++ b/include/bitcoin/system/impl/log/features/counter.ipp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/impl/log/features/gauge.ipp b/include/bitcoin/system/impl/log/features/gauge.ipp
index ae853dd19f..cd9f41b76e 100644
--- a/include/bitcoin/system/impl/log/features/gauge.ipp
+++ b/include/bitcoin/system/impl/log/features/gauge.ipp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/impl/log/features/metric.ipp b/include/bitcoin/system/impl/log/features/metric.ipp
index 34053c5490..f0f635a603 100644
--- a/include/bitcoin/system/impl/log/features/metric.ipp
+++ b/include/bitcoin/system/impl/log/features/metric.ipp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/impl/log/features/rate.ipp b/include/bitcoin/system/impl/log/features/rate.ipp
index 2a28bb8597..750a1e2114 100644
--- a/include/bitcoin/system/impl/log/features/rate.ipp
+++ b/include/bitcoin/system/impl/log/features/rate.ipp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/impl/log/features/timer.ipp b/include/bitcoin/system/impl/log/features/timer.ipp
index b9aa9e4345..49fada2ad9 100644
--- a/include/bitcoin/system/impl/log/features/timer.ipp
+++ b/include/bitcoin/system/impl/log/features/timer.ipp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/impl/machine/interpreter.ipp b/include/bitcoin/system/impl/machine/interpreter.ipp
index 7ef5564350..0bda64df1a 100644
--- a/include/bitcoin/system/impl/machine/interpreter.ipp
+++ b/include/bitcoin/system/impl/machine/interpreter.ipp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/impl/machine/number.ipp b/include/bitcoin/system/impl/machine/number.ipp
index 1927f6c86b..1c0496f063 100644
--- a/include/bitcoin/system/impl/machine/number.ipp
+++ b/include/bitcoin/system/impl/machine/number.ipp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/impl/machine/operation.ipp b/include/bitcoin/system/impl/machine/operation.ipp
index 9c8eabb0df..029bb5983d 100644
--- a/include/bitcoin/system/impl/machine/operation.ipp
+++ b/include/bitcoin/system/impl/machine/operation.ipp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/impl/machine/program.ipp b/include/bitcoin/system/impl/machine/program.ipp
index 08137aea82..f37b3d583d 100644
--- a/include/bitcoin/system/impl/machine/program.ipp
+++ b/include/bitcoin/system/impl/machine/program.ipp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/impl/math/checksum.ipp b/include/bitcoin/system/impl/math/checksum.ipp
index f9e3b7948a..56e6aede06 100644
--- a/include/bitcoin/system/impl/math/checksum.ipp
+++ b/include/bitcoin/system/impl/math/checksum.ipp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/impl/math/hash.ipp b/include/bitcoin/system/impl/math/hash.ipp
index ef2d0dc339..3c9c906f92 100644
--- a/include/bitcoin/system/impl/math/hash.ipp
+++ b/include/bitcoin/system/impl/math/hash.ipp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/impl/utility/array_slice.ipp b/include/bitcoin/system/impl/utility/array_slice.ipp
index a459c9c59b..d6a9ebbf24 100644
--- a/include/bitcoin/system/impl/utility/array_slice.ipp
+++ b/include/bitcoin/system/impl/utility/array_slice.ipp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/impl/utility/collection.ipp b/include/bitcoin/system/impl/utility/collection.ipp
index c6f81c0471..2b6e8a3cae 100644
--- a/include/bitcoin/system/impl/utility/collection.ipp
+++ b/include/bitcoin/system/impl/utility/collection.ipp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/impl/utility/data.ipp b/include/bitcoin/system/impl/utility/data.ipp
index cc10576773..b0b419f393 100644
--- a/include/bitcoin/system/impl/utility/data.ipp
+++ b/include/bitcoin/system/impl/utility/data.ipp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/impl/utility/deserializer.ipp b/include/bitcoin/system/impl/utility/deserializer.ipp
index 13464393fa..f3abe4146a 100644
--- a/include/bitcoin/system/impl/utility/deserializer.ipp
+++ b/include/bitcoin/system/impl/utility/deserializer.ipp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/impl/utility/endian.ipp b/include/bitcoin/system/impl/utility/endian.ipp
index 57ccfbd90e..a7042c35c8 100644
--- a/include/bitcoin/system/impl/utility/endian.ipp
+++ b/include/bitcoin/system/impl/utility/endian.ipp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/impl/utility/istream_reader.ipp b/include/bitcoin/system/impl/utility/istream_reader.ipp
index a33f81fbbc..32cadd45dc 100644
--- a/include/bitcoin/system/impl/utility/istream_reader.ipp
+++ b/include/bitcoin/system/impl/utility/istream_reader.ipp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/impl/utility/ostream_writer.ipp b/include/bitcoin/system/impl/utility/ostream_writer.ipp
index 740faf6d6a..f6e209b259 100644
--- a/include/bitcoin/system/impl/utility/ostream_writer.ipp
+++ b/include/bitcoin/system/impl/utility/ostream_writer.ipp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/impl/utility/pending.ipp b/include/bitcoin/system/impl/utility/pending.ipp
index 4e9b3b4e6f..6b94ff29a4 100644
--- a/include/bitcoin/system/impl/utility/pending.ipp
+++ b/include/bitcoin/system/impl/utility/pending.ipp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/impl/utility/resubscriber.ipp b/include/bitcoin/system/impl/utility/resubscriber.ipp
index 0ea16f05ab..fe3cbccf7d 100644
--- a/include/bitcoin/system/impl/utility/resubscriber.ipp
+++ b/include/bitcoin/system/impl/utility/resubscriber.ipp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/impl/utility/serializer.ipp b/include/bitcoin/system/impl/utility/serializer.ipp
index e647543bfd..e525907c0a 100644
--- a/include/bitcoin/system/impl/utility/serializer.ipp
+++ b/include/bitcoin/system/impl/utility/serializer.ipp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/impl/utility/subscriber.ipp b/include/bitcoin/system/impl/utility/subscriber.ipp
index cf214f3d03..f595ff0525 100644
--- a/include/bitcoin/system/impl/utility/subscriber.ipp
+++ b/include/bitcoin/system/impl/utility/subscriber.ipp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/impl/utility/track.ipp b/include/bitcoin/system/impl/utility/track.ipp
index d4708cd96b..c8ac1a6310 100644
--- a/include/bitcoin/system/impl/utility/track.ipp
+++ b/include/bitcoin/system/impl/utility/track.ipp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/log/attributes.hpp b/include/bitcoin/system/log/attributes.hpp
index 6c15af5da4..f426f61fac 100644
--- a/include/bitcoin/system/log/attributes.hpp
+++ b/include/bitcoin/system/log/attributes.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/log/features/counter.hpp b/include/bitcoin/system/log/features/counter.hpp
index ad04e929d9..31831a65b2 100644
--- a/include/bitcoin/system/log/features/counter.hpp
+++ b/include/bitcoin/system/log/features/counter.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/log/features/gauge.hpp b/include/bitcoin/system/log/features/gauge.hpp
index dc05c7b756..10644c9a9c 100644
--- a/include/bitcoin/system/log/features/gauge.hpp
+++ b/include/bitcoin/system/log/features/gauge.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/log/features/metric.hpp b/include/bitcoin/system/log/features/metric.hpp
index 2cfaad2af4..5850694676 100644
--- a/include/bitcoin/system/log/features/metric.hpp
+++ b/include/bitcoin/system/log/features/metric.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/log/features/rate.hpp b/include/bitcoin/system/log/features/rate.hpp
index a4af04205b..3f5cebdded 100644
--- a/include/bitcoin/system/log/features/rate.hpp
+++ b/include/bitcoin/system/log/features/rate.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/log/features/timer.hpp b/include/bitcoin/system/log/features/timer.hpp
index c5c096889d..bbf1e54eb3 100644
--- a/include/bitcoin/system/log/features/timer.hpp
+++ b/include/bitcoin/system/log/features/timer.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/log/rotable_file.hpp b/include/bitcoin/system/log/rotable_file.hpp
index 0df55932e9..d6a75db897 100644
--- a/include/bitcoin/system/log/rotable_file.hpp
+++ b/include/bitcoin/system/log/rotable_file.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/log/severity.hpp b/include/bitcoin/system/log/severity.hpp
index 7befafab61..be5e56fcff 100644
--- a/include/bitcoin/system/log/severity.hpp
+++ b/include/bitcoin/system/log/severity.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/log/sink.hpp b/include/bitcoin/system/log/sink.hpp
index 1302c42b6c..2591f0eae0 100644
--- a/include/bitcoin/system/log/sink.hpp
+++ b/include/bitcoin/system/log/sink.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/log/source.hpp b/include/bitcoin/system/log/source.hpp
index 6577a0d2d2..faa73a5464 100644
--- a/include/bitcoin/system/log/source.hpp
+++ b/include/bitcoin/system/log/source.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/log/statsd_sink.hpp b/include/bitcoin/system/log/statsd_sink.hpp
index 5e717bdd2e..c4214bd9b2 100644
--- a/include/bitcoin/system/log/statsd_sink.hpp
+++ b/include/bitcoin/system/log/statsd_sink.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/log/statsd_source.hpp b/include/bitcoin/system/log/statsd_source.hpp
index 27dfc70faa..41bc9c51c2 100644
--- a/include/bitcoin/system/log/statsd_source.hpp
+++ b/include/bitcoin/system/log/statsd_source.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/log/udp_client_sink.hpp b/include/bitcoin/system/log/udp_client_sink.hpp
index 5f9d01aace..6cd3fabdc1 100644
--- a/include/bitcoin/system/log/udp_client_sink.hpp
+++ b/include/bitcoin/system/log/udp_client_sink.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/machine/interpreter.hpp b/include/bitcoin/system/machine/interpreter.hpp
index 8716e48303..e06dfc2cbe 100644
--- a/include/bitcoin/system/machine/interpreter.hpp
+++ b/include/bitcoin/system/machine/interpreter.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/machine/number.hpp b/include/bitcoin/system/machine/number.hpp
index f116214ad6..b36e3e5d78 100644
--- a/include/bitcoin/system/machine/number.hpp
+++ b/include/bitcoin/system/machine/number.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/machine/opcode.hpp b/include/bitcoin/system/machine/opcode.hpp
index b3df749e92..3626d0c8be 100644
--- a/include/bitcoin/system/machine/opcode.hpp
+++ b/include/bitcoin/system/machine/opcode.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/machine/operation.hpp b/include/bitcoin/system/machine/operation.hpp
index 7f6196b81a..f2bb3140bf 100644
--- a/include/bitcoin/system/machine/operation.hpp
+++ b/include/bitcoin/system/machine/operation.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/machine/program.hpp b/include/bitcoin/system/machine/program.hpp
index 0fe68d3e46..328f5d1d3e 100644
--- a/include/bitcoin/system/machine/program.hpp
+++ b/include/bitcoin/system/machine/program.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/machine/rule_fork.hpp b/include/bitcoin/system/machine/rule_fork.hpp
index a8d0ea1f53..0d6a1c1097 100644
--- a/include/bitcoin/system/machine/rule_fork.hpp
+++ b/include/bitcoin/system/machine/rule_fork.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/machine/script_pattern.hpp b/include/bitcoin/system/machine/script_pattern.hpp
index 062d851953..e4dcb8e13e 100644
--- a/include/bitcoin/system/machine/script_pattern.hpp
+++ b/include/bitcoin/system/machine/script_pattern.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/machine/script_version.hpp b/include/bitcoin/system/machine/script_version.hpp
index f387c67467..434124563a 100644
--- a/include/bitcoin/system/machine/script_version.hpp
+++ b/include/bitcoin/system/machine/script_version.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/machine/sighash_algorithm.hpp b/include/bitcoin/system/machine/sighash_algorithm.hpp
index e45da0688c..d74adb3c09 100644
--- a/include/bitcoin/system/machine/sighash_algorithm.hpp
+++ b/include/bitcoin/system/machine/sighash_algorithm.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/math/checksum.hpp b/include/bitcoin/system/math/checksum.hpp
index ad07fec434..2dbbb68fce 100644
--- a/include/bitcoin/system/math/checksum.hpp
+++ b/include/bitcoin/system/math/checksum.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/math/crypto.hpp b/include/bitcoin/system/math/crypto.hpp
index 66f5f4ab0b..54fe86c777 100644
--- a/include/bitcoin/system/math/crypto.hpp
+++ b/include/bitcoin/system/math/crypto.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/math/elliptic_curve.hpp b/include/bitcoin/system/math/elliptic_curve.hpp
index 210775d7e6..0567b79f40 100644
--- a/include/bitcoin/system/math/elliptic_curve.hpp
+++ b/include/bitcoin/system/math/elliptic_curve.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/math/hash.hpp b/include/bitcoin/system/math/hash.hpp
index caa2135b2a..02c33ba501 100644
--- a/include/bitcoin/system/math/hash.hpp
+++ b/include/bitcoin/system/math/hash.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/math/limits.hpp b/include/bitcoin/system/math/limits.hpp
index dfccdb8a9d..831a98d170 100644
--- a/include/bitcoin/system/math/limits.hpp
+++ b/include/bitcoin/system/math/limits.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/math/stealth.hpp b/include/bitcoin/system/math/stealth.hpp
index ff62a3915c..a38f84b60a 100644
--- a/include/bitcoin/system/math/stealth.hpp
+++ b/include/bitcoin/system/math/stealth.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/math/uint256.hpp b/include/bitcoin/system/math/uint256.hpp
index 15470cb042..464f7a2aa2 100644
--- a/include/bitcoin/system/math/uint256.hpp
+++ b/include/bitcoin/system/math/uint256.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/message/address.hpp b/include/bitcoin/system/message/address.hpp
index 98318e55a1..e361cb9b1f 100644
--- a/include/bitcoin/system/message/address.hpp
+++ b/include/bitcoin/system/message/address.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/message/alert.hpp b/include/bitcoin/system/message/alert.hpp
index 68968d0870..31eedd9bdf 100644
--- a/include/bitcoin/system/message/alert.hpp
+++ b/include/bitcoin/system/message/alert.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/message/alert_payload.hpp b/include/bitcoin/system/message/alert_payload.hpp
index a4b51d9c2c..3f3b95f6ce 100644
--- a/include/bitcoin/system/message/alert_payload.hpp
+++ b/include/bitcoin/system/message/alert_payload.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/message/block.hpp b/include/bitcoin/system/message/block.hpp
index 33b29b4e10..7a9953b37e 100644
--- a/include/bitcoin/system/message/block.hpp
+++ b/include/bitcoin/system/message/block.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/message/block_transactions.hpp b/include/bitcoin/system/message/block_transactions.hpp
index 5adf87dc8c..a3a090de42 100644
--- a/include/bitcoin/system/message/block_transactions.hpp
+++ b/include/bitcoin/system/message/block_transactions.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/message/compact_block.hpp b/include/bitcoin/system/message/compact_block.hpp
index 92c2e5cad3..7eaee501a1 100644
--- a/include/bitcoin/system/message/compact_block.hpp
+++ b/include/bitcoin/system/message/compact_block.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/message/fee_filter.hpp b/include/bitcoin/system/message/fee_filter.hpp
index 8c55c377a1..ffe60b0812 100644
--- a/include/bitcoin/system/message/fee_filter.hpp
+++ b/include/bitcoin/system/message/fee_filter.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/message/filter_add.hpp b/include/bitcoin/system/message/filter_add.hpp
index 3999c87f28..680f7e5220 100644
--- a/include/bitcoin/system/message/filter_add.hpp
+++ b/include/bitcoin/system/message/filter_add.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/message/filter_clear.hpp b/include/bitcoin/system/message/filter_clear.hpp
index 6669c8baa0..edb467b13a 100644
--- a/include/bitcoin/system/message/filter_clear.hpp
+++ b/include/bitcoin/system/message/filter_clear.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/message/filter_load.hpp b/include/bitcoin/system/message/filter_load.hpp
index dbd3451395..4e7098710d 100644
--- a/include/bitcoin/system/message/filter_load.hpp
+++ b/include/bitcoin/system/message/filter_load.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/message/get_address.hpp b/include/bitcoin/system/message/get_address.hpp
index f4adc7c16a..49f66ad152 100644
--- a/include/bitcoin/system/message/get_address.hpp
+++ b/include/bitcoin/system/message/get_address.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/message/get_block_transactions.hpp b/include/bitcoin/system/message/get_block_transactions.hpp
index 0a628adc2c..dedeb94037 100644
--- a/include/bitcoin/system/message/get_block_transactions.hpp
+++ b/include/bitcoin/system/message/get_block_transactions.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/message/get_blocks.hpp b/include/bitcoin/system/message/get_blocks.hpp
index 6f7c69e9b4..32efab0d17 100644
--- a/include/bitcoin/system/message/get_blocks.hpp
+++ b/include/bitcoin/system/message/get_blocks.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/message/get_data.hpp b/include/bitcoin/system/message/get_data.hpp
index 5a7875e89a..d9016175f0 100644
--- a/include/bitcoin/system/message/get_data.hpp
+++ b/include/bitcoin/system/message/get_data.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/message/get_headers.hpp b/include/bitcoin/system/message/get_headers.hpp
index c88cf54467..f36a76459e 100644
--- a/include/bitcoin/system/message/get_headers.hpp
+++ b/include/bitcoin/system/message/get_headers.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/message/header.hpp b/include/bitcoin/system/message/header.hpp
index ebb9ce0785..77b83f4f25 100644
--- a/include/bitcoin/system/message/header.hpp
+++ b/include/bitcoin/system/message/header.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/message/headers.hpp b/include/bitcoin/system/message/headers.hpp
index b559ebf399..def37dc802 100644
--- a/include/bitcoin/system/message/headers.hpp
+++ b/include/bitcoin/system/message/headers.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/message/heading.hpp b/include/bitcoin/system/message/heading.hpp
index bb897fc95e..1d06644e8a 100644
--- a/include/bitcoin/system/message/heading.hpp
+++ b/include/bitcoin/system/message/heading.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/message/inventory.hpp b/include/bitcoin/system/message/inventory.hpp
index 68dcdeb916..14416bc9f3 100644
--- a/include/bitcoin/system/message/inventory.hpp
+++ b/include/bitcoin/system/message/inventory.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/message/inventory_vector.hpp b/include/bitcoin/system/message/inventory_vector.hpp
index 637128ceb3..0025432ba8 100644
--- a/include/bitcoin/system/message/inventory_vector.hpp
+++ b/include/bitcoin/system/message/inventory_vector.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/message/memory_pool.hpp b/include/bitcoin/system/message/memory_pool.hpp
index 894bdb9fcb..071c8b6c28 100644
--- a/include/bitcoin/system/message/memory_pool.hpp
+++ b/include/bitcoin/system/message/memory_pool.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/message/merkle_block.hpp b/include/bitcoin/system/message/merkle_block.hpp
index 5375f95a21..c3e5bd91ee 100644
--- a/include/bitcoin/system/message/merkle_block.hpp
+++ b/include/bitcoin/system/message/merkle_block.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/message/messages.hpp b/include/bitcoin/system/message/messages.hpp
index cc6e671c16..d9fc287a42 100644
--- a/include/bitcoin/system/message/messages.hpp
+++ b/include/bitcoin/system/message/messages.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/message/network_address.hpp b/include/bitcoin/system/message/network_address.hpp
index 3f4d321d8a..c570101cc3 100644
--- a/include/bitcoin/system/message/network_address.hpp
+++ b/include/bitcoin/system/message/network_address.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/message/not_found.hpp b/include/bitcoin/system/message/not_found.hpp
index 9d313533bb..febaf74662 100644
--- a/include/bitcoin/system/message/not_found.hpp
+++ b/include/bitcoin/system/message/not_found.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/message/ping.hpp b/include/bitcoin/system/message/ping.hpp
index 450828a7f6..908050e2e3 100644
--- a/include/bitcoin/system/message/ping.hpp
+++ b/include/bitcoin/system/message/ping.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/message/pong.hpp b/include/bitcoin/system/message/pong.hpp
index f7a3517e59..4657c2bef7 100644
--- a/include/bitcoin/system/message/pong.hpp
+++ b/include/bitcoin/system/message/pong.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/message/prefilled_transaction.hpp b/include/bitcoin/system/message/prefilled_transaction.hpp
index 2bdbe20471..35a7770a97 100644
--- a/include/bitcoin/system/message/prefilled_transaction.hpp
+++ b/include/bitcoin/system/message/prefilled_transaction.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/message/reject.hpp b/include/bitcoin/system/message/reject.hpp
index a029b3d533..2c17446145 100644
--- a/include/bitcoin/system/message/reject.hpp
+++ b/include/bitcoin/system/message/reject.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/message/send_compact.hpp b/include/bitcoin/system/message/send_compact.hpp
index b711399cb1..dff7e56e3f 100644
--- a/include/bitcoin/system/message/send_compact.hpp
+++ b/include/bitcoin/system/message/send_compact.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/message/send_headers.hpp b/include/bitcoin/system/message/send_headers.hpp
index f8987351af..fee79de528 100644
--- a/include/bitcoin/system/message/send_headers.hpp
+++ b/include/bitcoin/system/message/send_headers.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/message/transaction.hpp b/include/bitcoin/system/message/transaction.hpp
index 49cb806a24..ac50edacea 100644
--- a/include/bitcoin/system/message/transaction.hpp
+++ b/include/bitcoin/system/message/transaction.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/message/verack.hpp b/include/bitcoin/system/message/verack.hpp
index b2768855ff..7672063316 100644
--- a/include/bitcoin/system/message/verack.hpp
+++ b/include/bitcoin/system/message/verack.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/message/version.hpp b/include/bitcoin/system/message/version.hpp
index 885c390ff2..8c332b9fef 100644
--- a/include/bitcoin/system/message/version.hpp
+++ b/include/bitcoin/system/message/version.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/unicode/console_streambuf.hpp b/include/bitcoin/system/unicode/console_streambuf.hpp
index ef159f2b92..8e5bba7382 100644
--- a/include/bitcoin/system/unicode/console_streambuf.hpp
+++ b/include/bitcoin/system/unicode/console_streambuf.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2019 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/unicode/ifstream.hpp b/include/bitcoin/system/unicode/ifstream.hpp
index 60ef25dd89..35d7cfe90a 100644
--- a/include/bitcoin/system/unicode/ifstream.hpp
+++ b/include/bitcoin/system/unicode/ifstream.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/unicode/ofstream.hpp b/include/bitcoin/system/unicode/ofstream.hpp
index 1c1d192a11..c85cdadefe 100644
--- a/include/bitcoin/system/unicode/ofstream.hpp
+++ b/include/bitcoin/system/unicode/ofstream.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/unicode/unicode.hpp b/include/bitcoin/system/unicode/unicode.hpp
index 71d7a83b97..56cf2f9a9f 100644
--- a/include/bitcoin/system/unicode/unicode.hpp
+++ b/include/bitcoin/system/unicode/unicode.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2019 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/unicode/unicode_istream.hpp b/include/bitcoin/system/unicode/unicode_istream.hpp
index 154b1c6a2b..680d42731d 100644
--- a/include/bitcoin/system/unicode/unicode_istream.hpp
+++ b/include/bitcoin/system/unicode/unicode_istream.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/unicode/unicode_ostream.hpp b/include/bitcoin/system/unicode/unicode_ostream.hpp
index ad13b35a20..fcb0b918bc 100644
--- a/include/bitcoin/system/unicode/unicode_ostream.hpp
+++ b/include/bitcoin/system/unicode/unicode_ostream.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/unicode/unicode_streambuf.hpp b/include/bitcoin/system/unicode/unicode_streambuf.hpp
index 713c1b31ec..789b97b3a9 100644
--- a/include/bitcoin/system/unicode/unicode_streambuf.hpp
+++ b/include/bitcoin/system/unicode/unicode_streambuf.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/utility/array_slice.hpp b/include/bitcoin/system/utility/array_slice.hpp
index d9252c3af4..1d772d8587 100644
--- a/include/bitcoin/system/utility/array_slice.hpp
+++ b/include/bitcoin/system/utility/array_slice.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/utility/asio.hpp b/include/bitcoin/system/utility/asio.hpp
index 1c9629cf7c..0f00337d20 100644
--- a/include/bitcoin/system/utility/asio.hpp
+++ b/include/bitcoin/system/utility/asio.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/utility/assert.hpp b/include/bitcoin/system/utility/assert.hpp
index 8ebd316b15..03ae918e14 100644
--- a/include/bitcoin/system/utility/assert.hpp
+++ b/include/bitcoin/system/utility/assert.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/utility/atomic.hpp b/include/bitcoin/system/utility/atomic.hpp
index 61133f7d41..c2bcdadb65 100644
--- a/include/bitcoin/system/utility/atomic.hpp
+++ b/include/bitcoin/system/utility/atomic.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/utility/binary.hpp b/include/bitcoin/system/utility/binary.hpp
index 0a58ec75c4..c67172ac2a 100644
--- a/include/bitcoin/system/utility/binary.hpp
+++ b/include/bitcoin/system/utility/binary.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/utility/collection.hpp b/include/bitcoin/system/utility/collection.hpp
index 1516c9c6f9..476ae6ab88 100644
--- a/include/bitcoin/system/utility/collection.hpp
+++ b/include/bitcoin/system/utility/collection.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/utility/color.hpp b/include/bitcoin/system/utility/color.hpp
index 6872da1083..bbb2f3eb26 100644
--- a/include/bitcoin/system/utility/color.hpp
+++ b/include/bitcoin/system/utility/color.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/utility/conditional_lock.hpp b/include/bitcoin/system/utility/conditional_lock.hpp
index 92e5fd5800..09beb6e866 100644
--- a/include/bitcoin/system/utility/conditional_lock.hpp
+++ b/include/bitcoin/system/utility/conditional_lock.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/utility/container_sink.hpp b/include/bitcoin/system/utility/container_sink.hpp
index f91b2f8329..11765e1991 100644
--- a/include/bitcoin/system/utility/container_sink.hpp
+++ b/include/bitcoin/system/utility/container_sink.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/utility/container_source.hpp b/include/bitcoin/system/utility/container_source.hpp
index 5b67528636..e6e110fe2e 100644
--- a/include/bitcoin/system/utility/container_source.hpp
+++ b/include/bitcoin/system/utility/container_source.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/utility/data.hpp b/include/bitcoin/system/utility/data.hpp
index f85f1a809a..7fa72219ab 100644
--- a/include/bitcoin/system/utility/data.hpp
+++ b/include/bitcoin/system/utility/data.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/utility/deadline.hpp b/include/bitcoin/system/utility/deadline.hpp
index 7791148476..43fa39bf0d 100644
--- a/include/bitcoin/system/utility/deadline.hpp
+++ b/include/bitcoin/system/utility/deadline.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/utility/decorator.hpp b/include/bitcoin/system/utility/decorator.hpp
index 06551211a4..3613d9b098 100644
--- a/include/bitcoin/system/utility/decorator.hpp
+++ b/include/bitcoin/system/utility/decorator.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/utility/delegates.hpp b/include/bitcoin/system/utility/delegates.hpp
index 220c647910..73edf33a85 100644
--- a/include/bitcoin/system/utility/delegates.hpp
+++ b/include/bitcoin/system/utility/delegates.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/utility/deserializer.hpp b/include/bitcoin/system/utility/deserializer.hpp
index 6bee72c4aa..ea30036e41 100644
--- a/include/bitcoin/system/utility/deserializer.hpp
+++ b/include/bitcoin/system/utility/deserializer.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/utility/dispatcher.hpp b/include/bitcoin/system/utility/dispatcher.hpp
index 5ead8c4f54..697dcca08f 100644
--- a/include/bitcoin/system/utility/dispatcher.hpp
+++ b/include/bitcoin/system/utility/dispatcher.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/utility/enable_shared_from_base.hpp b/include/bitcoin/system/utility/enable_shared_from_base.hpp
index fc50d059fb..8c584ed9ad 100644
--- a/include/bitcoin/system/utility/enable_shared_from_base.hpp
+++ b/include/bitcoin/system/utility/enable_shared_from_base.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/utility/endian.hpp b/include/bitcoin/system/utility/endian.hpp
index f7ab7c4c23..0e1e05928e 100644
--- a/include/bitcoin/system/utility/endian.hpp
+++ b/include/bitcoin/system/utility/endian.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/utility/exceptions.hpp b/include/bitcoin/system/utility/exceptions.hpp
index 7ca6e40d63..0a83377eb3 100644
--- a/include/bitcoin/system/utility/exceptions.hpp
+++ b/include/bitcoin/system/utility/exceptions.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/utility/flush_lock.hpp b/include/bitcoin/system/utility/flush_lock.hpp
index 1cc7edbae3..dddce8858b 100644
--- a/include/bitcoin/system/utility/flush_lock.hpp
+++ b/include/bitcoin/system/utility/flush_lock.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/utility/interprocess_lock.hpp b/include/bitcoin/system/utility/interprocess_lock.hpp
index 578cf0dbfe..48c530c6b8 100644
--- a/include/bitcoin/system/utility/interprocess_lock.hpp
+++ b/include/bitcoin/system/utility/interprocess_lock.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/utility/istream_reader.hpp b/include/bitcoin/system/utility/istream_reader.hpp
index b6cd181027..3621d56b8e 100644
--- a/include/bitcoin/system/utility/istream_reader.hpp
+++ b/include/bitcoin/system/utility/istream_reader.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/utility/monitor.hpp b/include/bitcoin/system/utility/monitor.hpp
index 798c360f03..02c4ceab5f 100644
--- a/include/bitcoin/system/utility/monitor.hpp
+++ b/include/bitcoin/system/utility/monitor.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/utility/noncopyable.hpp b/include/bitcoin/system/utility/noncopyable.hpp
index 551936965a..ad71a4817e 100644
--- a/include/bitcoin/system/utility/noncopyable.hpp
+++ b/include/bitcoin/system/utility/noncopyable.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/utility/ostream_writer.hpp b/include/bitcoin/system/utility/ostream_writer.hpp
index ff4790f107..1f0e4d38c6 100644
--- a/include/bitcoin/system/utility/ostream_writer.hpp
+++ b/include/bitcoin/system/utility/ostream_writer.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/utility/pending.hpp b/include/bitcoin/system/utility/pending.hpp
index 52a3545ef3..9d34b2e64d 100644
--- a/include/bitcoin/system/utility/pending.hpp
+++ b/include/bitcoin/system/utility/pending.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/utility/png.hpp b/include/bitcoin/system/utility/png.hpp
index 54b1f86c6d..53d7eaaffc 100644
--- a/include/bitcoin/system/utility/png.hpp
+++ b/include/bitcoin/system/utility/png.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/utility/prioritized_mutex.hpp b/include/bitcoin/system/utility/prioritized_mutex.hpp
index 587cac9b81..ee147c5931 100644
--- a/include/bitcoin/system/utility/prioritized_mutex.hpp
+++ b/include/bitcoin/system/utility/prioritized_mutex.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/utility/pseudo_random.hpp b/include/bitcoin/system/utility/pseudo_random.hpp
index b5935b2560..d83fb612ef 100644
--- a/include/bitcoin/system/utility/pseudo_random.hpp
+++ b/include/bitcoin/system/utility/pseudo_random.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
@@ -28,6 +28,10 @@
 
 namespace libbitcoin {
 
+/**
+ * This pseudo random number is seeded via system clock, and is not intended
+ * for uses requiring true randomness.
+ */
 class BC_API pseudo_random
 {
   public:
diff --git a/include/bitcoin/system/utility/reader.hpp b/include/bitcoin/system/utility/reader.hpp
index 9f62bc032f..0e180d2d39 100644
--- a/include/bitcoin/system/utility/reader.hpp
+++ b/include/bitcoin/system/utility/reader.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/utility/resubscriber.hpp b/include/bitcoin/system/utility/resubscriber.hpp
index 5993d2d041..60783d9cc6 100644
--- a/include/bitcoin/system/utility/resubscriber.hpp
+++ b/include/bitcoin/system/utility/resubscriber.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/utility/scope_lock.hpp b/include/bitcoin/system/utility/scope_lock.hpp
index 347dd36f75..3b834797ef 100644
--- a/include/bitcoin/system/utility/scope_lock.hpp
+++ b/include/bitcoin/system/utility/scope_lock.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/utility/sequencer.hpp b/include/bitcoin/system/utility/sequencer.hpp
index 108e50f65d..892559d7ec 100644
--- a/include/bitcoin/system/utility/sequencer.hpp
+++ b/include/bitcoin/system/utility/sequencer.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/utility/sequential_lock.hpp b/include/bitcoin/system/utility/sequential_lock.hpp
index 73656488f4..1372ffa87f 100644
--- a/include/bitcoin/system/utility/sequential_lock.hpp
+++ b/include/bitcoin/system/utility/sequential_lock.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/utility/serializer.hpp b/include/bitcoin/system/utility/serializer.hpp
index ba8b73636e..c70ae857d3 100644
--- a/include/bitcoin/system/utility/serializer.hpp
+++ b/include/bitcoin/system/utility/serializer.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/utility/socket.hpp b/include/bitcoin/system/utility/socket.hpp
index a5d7993d94..ebfdb1032e 100644
--- a/include/bitcoin/system/utility/socket.hpp
+++ b/include/bitcoin/system/utility/socket.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/utility/string.hpp b/include/bitcoin/system/utility/string.hpp
index 74fd0f83e3..2a15a82a4e 100644
--- a/include/bitcoin/system/utility/string.hpp
+++ b/include/bitcoin/system/utility/string.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/utility/subscriber.hpp b/include/bitcoin/system/utility/subscriber.hpp
index 714cbef672..c1fe6d9134 100644
--- a/include/bitcoin/system/utility/subscriber.hpp
+++ b/include/bitcoin/system/utility/subscriber.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/utility/synchronizer.hpp b/include/bitcoin/system/utility/synchronizer.hpp
index 01c48f5aab..686a38db85 100644
--- a/include/bitcoin/system/utility/synchronizer.hpp
+++ b/include/bitcoin/system/utility/synchronizer.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/utility/thread.hpp b/include/bitcoin/system/utility/thread.hpp
index 3060f6907c..34b1d50457 100644
--- a/include/bitcoin/system/utility/thread.hpp
+++ b/include/bitcoin/system/utility/thread.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/utility/threadpool.hpp b/include/bitcoin/system/utility/threadpool.hpp
index bf3c936eb2..fcbe6f361f 100644
--- a/include/bitcoin/system/utility/threadpool.hpp
+++ b/include/bitcoin/system/utility/threadpool.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/utility/timer.hpp b/include/bitcoin/system/utility/timer.hpp
index 3a3c4db2a3..35e360270c 100644
--- a/include/bitcoin/system/utility/timer.hpp
+++ b/include/bitcoin/system/utility/timer.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/utility/track.hpp b/include/bitcoin/system/utility/track.hpp
index ac0453e6b2..57d60c0a1f 100644
--- a/include/bitcoin/system/utility/track.hpp
+++ b/include/bitcoin/system/utility/track.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/utility/work.hpp b/include/bitcoin/system/utility/work.hpp
index a77f2df10f..59bece6c49 100644
--- a/include/bitcoin/system/utility/work.hpp
+++ b/include/bitcoin/system/utility/work.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/utility/writer.hpp b/include/bitcoin/system/utility/writer.hpp
index 68de68ebca..d7eecf2295 100644
--- a/include/bitcoin/system/utility/writer.hpp
+++ b/include/bitcoin/system/utility/writer.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/version.hpp b/include/bitcoin/system/version.hpp
index 8d7626e368..0264f2cd57 100644
--- a/include/bitcoin/system/version.hpp
+++ b/include/bitcoin/system/version.hpp
@@ -1,5 +1,5 @@
 ///////////////////////////////////////////////////////////////////////////////
-// Copyright (c) 2014-2021 libbitcoin-system developers (see COPYING).
+// Copyright (c) 2014-2023 libbitcoin-system developers (see COPYING).
 //
 //        GENERATED SOURCE CODE, DO NOT EDIT EXCEPT EXPERIMENTALLY
 //
diff --git a/include/bitcoin/system/wallet/bitcoin_uri.hpp b/include/bitcoin/system/wallet/bitcoin_uri.hpp
index bafa9f8ce1..8905b73704 100644
--- a/include/bitcoin/system/wallet/bitcoin_uri.hpp
+++ b/include/bitcoin/system/wallet/bitcoin_uri.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/wallet/dictionary.hpp b/include/bitcoin/system/wallet/dictionary.hpp
index ab7b32ceb3..6c4d2b4073 100644
--- a/include/bitcoin/system/wallet/dictionary.hpp
+++ b/include/bitcoin/system/wallet/dictionary.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/wallet/ec_private.hpp b/include/bitcoin/system/wallet/ec_private.hpp
index 9c600d8d61..ca6b6278c7 100644
--- a/include/bitcoin/system/wallet/ec_private.hpp
+++ b/include/bitcoin/system/wallet/ec_private.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/wallet/ec_public.hpp b/include/bitcoin/system/wallet/ec_public.hpp
index ca161f6d9d..d9773344c5 100644
--- a/include/bitcoin/system/wallet/ec_public.hpp
+++ b/include/bitcoin/system/wallet/ec_public.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/wallet/ek_private.hpp b/include/bitcoin/system/wallet/ek_private.hpp
index 1bd96c0a47..3405a176b5 100644
--- a/include/bitcoin/system/wallet/ek_private.hpp
+++ b/include/bitcoin/system/wallet/ek_private.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/wallet/ek_public.hpp b/include/bitcoin/system/wallet/ek_public.hpp
index 63930ffca4..6d37ffaa09 100644
--- a/include/bitcoin/system/wallet/ek_public.hpp
+++ b/include/bitcoin/system/wallet/ek_public.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/wallet/ek_token.hpp b/include/bitcoin/system/wallet/ek_token.hpp
index 1b04681695..396792a2d7 100644
--- a/include/bitcoin/system/wallet/ek_token.hpp
+++ b/include/bitcoin/system/wallet/ek_token.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/wallet/electrum.hpp b/include/bitcoin/system/wallet/electrum.hpp
index 2d58d3461c..664daffa2e 100644
--- a/include/bitcoin/system/wallet/electrum.hpp
+++ b/include/bitcoin/system/wallet/electrum.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2019 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/wallet/electrum_dictionary.hpp b/include/bitcoin/system/wallet/electrum_dictionary.hpp
index 60077ba8f8..aea9027990 100644
--- a/include/bitcoin/system/wallet/electrum_dictionary.hpp
+++ b/include/bitcoin/system/wallet/electrum_dictionary.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2019 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/wallet/encrypted_keys.hpp b/include/bitcoin/system/wallet/encrypted_keys.hpp
index e9a7df4210..77561aff56 100644
--- a/include/bitcoin/system/wallet/encrypted_keys.hpp
+++ b/include/bitcoin/system/wallet/encrypted_keys.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/wallet/hd_private.hpp b/include/bitcoin/system/wallet/hd_private.hpp
index ee3a787c77..97f3be3ea1 100644
--- a/include/bitcoin/system/wallet/hd_private.hpp
+++ b/include/bitcoin/system/wallet/hd_private.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/wallet/hd_public.hpp b/include/bitcoin/system/wallet/hd_public.hpp
index f5be5c2838..37ec9ddf8e 100644
--- a/include/bitcoin/system/wallet/hd_public.hpp
+++ b/include/bitcoin/system/wallet/hd_public.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/wallet/message.hpp b/include/bitcoin/system/wallet/message.hpp
index 05913a1222..a9c4e04c00 100644
--- a/include/bitcoin/system/wallet/message.hpp
+++ b/include/bitcoin/system/wallet/message.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/wallet/mini_keys.hpp b/include/bitcoin/system/wallet/mini_keys.hpp
index e45fa792aa..2c0604cc0e 100644
--- a/include/bitcoin/system/wallet/mini_keys.hpp
+++ b/include/bitcoin/system/wallet/mini_keys.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/wallet/mnemonic.hpp b/include/bitcoin/system/wallet/mnemonic.hpp
index 67a9f776e8..f3a7b6670d 100644
--- a/include/bitcoin/system/wallet/mnemonic.hpp
+++ b/include/bitcoin/system/wallet/mnemonic.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/wallet/payment_address.hpp b/include/bitcoin/system/wallet/payment_address.hpp
index f6f8ae54fa..ee825cce29 100644
--- a/include/bitcoin/system/wallet/payment_address.hpp
+++ b/include/bitcoin/system/wallet/payment_address.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/wallet/qrcode.hpp b/include/bitcoin/system/wallet/qrcode.hpp
index 70affb8956..c317d99b75 100644
--- a/include/bitcoin/system/wallet/qrcode.hpp
+++ b/include/bitcoin/system/wallet/qrcode.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/wallet/select_outputs.hpp b/include/bitcoin/system/wallet/select_outputs.hpp
index 98968d486e..3dba286c0d 100644
--- a/include/bitcoin/system/wallet/select_outputs.hpp
+++ b/include/bitcoin/system/wallet/select_outputs.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/wallet/stealth_address.hpp b/include/bitcoin/system/wallet/stealth_address.hpp
index 9916f8cf34..b5af9a6f3a 100644
--- a/include/bitcoin/system/wallet/stealth_address.hpp
+++ b/include/bitcoin/system/wallet/stealth_address.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/wallet/stealth_receiver.hpp b/include/bitcoin/system/wallet/stealth_receiver.hpp
index 25892ddd03..5f04484457 100644
--- a/include/bitcoin/system/wallet/stealth_receiver.hpp
+++ b/include/bitcoin/system/wallet/stealth_receiver.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/wallet/stealth_sender.hpp b/include/bitcoin/system/wallet/stealth_sender.hpp
index a0f2ce3811..b3e4cc05fe 100644
--- a/include/bitcoin/system/wallet/stealth_sender.hpp
+++ b/include/bitcoin/system/wallet/stealth_sender.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/wallet/uri.hpp b/include/bitcoin/system/wallet/uri.hpp
index 816cbb3de9..3ba5d1a6b7 100644
--- a/include/bitcoin/system/wallet/uri.hpp
+++ b/include/bitcoin/system/wallet/uri.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/system/wallet/uri_reader.hpp b/include/bitcoin/system/wallet/uri_reader.hpp
index a0c9502967..968ed46069 100644
--- a/include/bitcoin/system/wallet/uri_reader.hpp
+++ b/include/bitcoin/system/wallet/uri_reader.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/install-cmake.sh b/install-cmake.sh
index 449b40ee27..8a1f0f89ca 100755
--- a/install-cmake.sh
+++ b/install-cmake.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 ###############################################################################
-#  Copyright (c) 2014-2020 libbitcoin-system developers (see COPYING).
+#  Copyright (c) 2014-2023 libbitcoin-system developers (see COPYING).
 #
 #         GENERATED SOURCE CODE, DO NOT EDIT EXCEPT EXPERIMENTALLY
 #
diff --git a/install-cmakepresets.sh b/install-cmakepresets.sh
index f5765a562b..1166ce9c13 100755
--- a/install-cmakepresets.sh
+++ b/install-cmakepresets.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 ###############################################################################
-#  Copyright (c) 2014-2020 libbitcoin-system developers (see COPYING).
+#  Copyright (c) 2014-2023 libbitcoin-system developers (see COPYING).
 #
 #         GENERATED SOURCE CODE, DO NOT EDIT EXCEPT EXPERIMENTALLY
 #
diff --git a/install.sh b/install.sh
index 0b2f4bc5ae..20c6f0666e 100755
--- a/install.sh
+++ b/install.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 ###############################################################################
-#  Copyright (c) 2014-2020 libbitcoin-system developers (see COPYING).
+#  Copyright (c) 2014-2023 libbitcoin-system developers (see COPYING).
 #
 #         GENERATED SOURCE CODE, DO NOT EDIT EXCEPT EXPERIMENTALLY
 #
diff --git a/libbitcoin-system-test_runner.sh b/libbitcoin-system-test_runner.sh
index d6f51aa835..662cc3ee69 100755
--- a/libbitcoin-system-test_runner.sh
+++ b/libbitcoin-system-test_runner.sh
@@ -1,6 +1,6 @@
 #!/bin/sh
 ###############################################################################
-#  Copyright (c) 2014-2020 libbitcoin-system developers (see COPYING).
+#  Copyright (c) 2014-2023 libbitcoin-system developers (see COPYING).
 #
 #         GENERATED SOURCE CODE, DO NOT EDIT EXCEPT EXPERIMENTALLY
 #
diff --git a/libbitcoin-system.pc.in b/libbitcoin-system.pc.in
index 24ec042f58..25ee579669 100644
--- a/libbitcoin-system.pc.in
+++ b/libbitcoin-system.pc.in
@@ -1,5 +1,5 @@
 ###############################################################################
-#  Copyright (c) 2014-2020 libbitcoin-system developers (see COPYING).
+#  Copyright (c) 2014-2023 libbitcoin-system developers (see COPYING).
 #
 #         GENERATED SOURCE CODE, DO NOT EDIT EXCEPT EXPERIMENTALLY
 #
diff --git a/src/chain/block.cpp b/src/chain/block.cpp
index e1431ead77..4967859f0f 100644
--- a/src/chain/block.cpp
+++ b/src/chain/block.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/chain/chain_state.cpp b/src/chain/chain_state.cpp
index dbe98c8e09..239ef0a6ab 100644
--- a/src/chain/chain_state.cpp
+++ b/src/chain/chain_state.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/chain/compact.cpp b/src/chain/compact.cpp
index 3eec8bf566..6d80111353 100644
--- a/src/chain/compact.cpp
+++ b/src/chain/compact.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/chain/header.cpp b/src/chain/header.cpp
index d2432576f3..04b481d62d 100644
--- a/src/chain/header.cpp
+++ b/src/chain/header.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/chain/input.cpp b/src/chain/input.cpp
index 54570d3ec1..de43eb599c 100644
--- a/src/chain/input.cpp
+++ b/src/chain/input.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/chain/output.cpp b/src/chain/output.cpp
index 0f5d5c98fc..cb34dd4c6c 100644
--- a/src/chain/output.cpp
+++ b/src/chain/output.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/chain/output_point.cpp b/src/chain/output_point.cpp
index 894d8aff2e..0f80fd429c 100644
--- a/src/chain/output_point.cpp
+++ b/src/chain/output_point.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/chain/point.cpp b/src/chain/point.cpp
index 1b45db3217..54a652259a 100644
--- a/src/chain/point.cpp
+++ b/src/chain/point.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/chain/point_iterator.cpp b/src/chain/point_iterator.cpp
index ec1f53f692..7bad448302 100644
--- a/src/chain/point_iterator.cpp
+++ b/src/chain/point_iterator.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/chain/point_value.cpp b/src/chain/point_value.cpp
index ab3ffd52f0..8c79fbc7af 100644
--- a/src/chain/point_value.cpp
+++ b/src/chain/point_value.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/chain/points_value.cpp b/src/chain/points_value.cpp
index 1b36ddd1ea..a4ae60b4fc 100644
--- a/src/chain/points_value.cpp
+++ b/src/chain/points_value.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/chain/script.cpp b/src/chain/script.cpp
index f58dbb784b..abcd3bedf7 100644
--- a/src/chain/script.cpp
+++ b/src/chain/script.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/chain/transaction.cpp b/src/chain/transaction.cpp
index de6c2955a3..e042a601b1 100644
--- a/src/chain/transaction.cpp
+++ b/src/chain/transaction.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/chain/witness.cpp b/src/chain/witness.cpp
index fca55454a9..83864a4fda 100644
--- a/src/chain/witness.cpp
+++ b/src/chain/witness.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/config/authority.cpp b/src/config/authority.cpp
index e88ef1258c..3de82f0643 100644
--- a/src/config/authority.cpp
+++ b/src/config/authority.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/config/base16.cpp b/src/config/base16.cpp
index 21b8785d6f..f2717c8bfc 100644
--- a/src/config/base16.cpp
+++ b/src/config/base16.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/config/base2.cpp b/src/config/base2.cpp
index b548eaa2fb..da411e12a8 100644
--- a/src/config/base2.cpp
+++ b/src/config/base2.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/config/base58.cpp b/src/config/base58.cpp
index c37ec09a99..3931d942de 100644
--- a/src/config/base58.cpp
+++ b/src/config/base58.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/config/base64.cpp b/src/config/base64.cpp
index 4bc6a33028..a887f08dca 100644
--- a/src/config/base64.cpp
+++ b/src/config/base64.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/config/checkpoint.cpp b/src/config/checkpoint.cpp
index 56b57f8b64..499f0cc5f1 100644
--- a/src/config/checkpoint.cpp
+++ b/src/config/checkpoint.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/config/directory.cpp b/src/config/directory.cpp
index 376f690bae..cda6c0110c 100644
--- a/src/config/directory.cpp
+++ b/src/config/directory.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/config/endpoint.cpp b/src/config/endpoint.cpp
index 72306d00d8..1b5df5b102 100644
--- a/src/config/endpoint.cpp
+++ b/src/config/endpoint.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/config/hash160.cpp b/src/config/hash160.cpp
index b002e7348d..c30f835aed 100644
--- a/src/config/hash160.cpp
+++ b/src/config/hash160.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/config/hash256.cpp b/src/config/hash256.cpp
index 02eed2353e..58a575fc23 100644
--- a/src/config/hash256.cpp
+++ b/src/config/hash256.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/config/parameter.cpp b/src/config/parameter.cpp
index 2ed3396b46..2e91fd0a97 100644
--- a/src/config/parameter.cpp
+++ b/src/config/parameter.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/config/parser.cpp b/src/config/parser.cpp
index 3db3144a0f..206c627694 100644
--- a/src/config/parser.cpp
+++ b/src/config/parser.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/config/printer.cpp b/src/config/printer.cpp
index bc0b561676..c03e8b3ec4 100644
--- a/src/config/printer.cpp
+++ b/src/config/printer.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/config/sodium.cpp b/src/config/sodium.cpp
index 541be54600..b348dc339d 100644
--- a/src/config/sodium.cpp
+++ b/src/config/sodium.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/error.cpp b/src/error.cpp
index 3a1f79b448..92536dae5b 100644
--- a/src/error.cpp
+++ b/src/error.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/formats/base_10.cpp b/src/formats/base_10.cpp
index b09e0585c5..478682dccf 100644
--- a/src/formats/base_10.cpp
+++ b/src/formats/base_10.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/formats/base_16.cpp b/src/formats/base_16.cpp
index 410656118f..fe5f6870ad 100644
--- a/src/formats/base_16.cpp
+++ b/src/formats/base_16.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/formats/base_58.cpp b/src/formats/base_58.cpp
index 5d2f080393..c5ddb814db 100644
--- a/src/formats/base_58.cpp
+++ b/src/formats/base_58.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/formats/base_64.cpp b/src/formats/base_64.cpp
index 9422593d09..b2311a2d68 100644
--- a/src/formats/base_64.cpp
+++ b/src/formats/base_64.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/formats/base_85.cpp b/src/formats/base_85.cpp
index 72a9efd275..271a142876 100644
--- a/src/formats/base_85.cpp
+++ b/src/formats/base_85.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/log/sink.cpp b/src/log/sink.cpp
index dda29bea29..3d55bbb5a7 100644
--- a/src/log/sink.cpp
+++ b/src/log/sink.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/log/statsd_sink.cpp b/src/log/statsd_sink.cpp
index 1fce8ccf86..2e26864316 100644
--- a/src/log/statsd_sink.cpp
+++ b/src/log/statsd_sink.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/log/udp_client_sink.cpp b/src/log/udp_client_sink.cpp
index 9048827b6a..11cb7ed0c3 100644
--- a/src/log/udp_client_sink.cpp
+++ b/src/log/udp_client_sink.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/machine/interpreter.cpp b/src/machine/interpreter.cpp
index 6e4d7e3ead..cae2378616 100644
--- a/src/machine/interpreter.cpp
+++ b/src/machine/interpreter.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/machine/number.cpp b/src/machine/number.cpp
index 9d5618036a..c3870cb1b2 100644
--- a/src/machine/number.cpp
+++ b/src/machine/number.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/machine/opcode.cpp b/src/machine/opcode.cpp
index 4cf0ff0195..bc1ccf5837 100644
--- a/src/machine/opcode.cpp
+++ b/src/machine/opcode.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/machine/operation.cpp b/src/machine/operation.cpp
index d2433fb7ff..7029df093a 100644
--- a/src/machine/operation.cpp
+++ b/src/machine/operation.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/machine/program.cpp b/src/machine/program.cpp
index 39c99d05cd..a4958cdffe 100644
--- a/src/machine/program.cpp
+++ b/src/machine/program.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/math/checksum.cpp b/src/math/checksum.cpp
index ef18b83a5d..df5a447ffe 100644
--- a/src/math/checksum.cpp
+++ b/src/math/checksum.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/math/crypto.cpp b/src/math/crypto.cpp
index f6a2b4fcd2..9933d2f6ad 100644
--- a/src/math/crypto.cpp
+++ b/src/math/crypto.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/math/elliptic_curve.cpp b/src/math/elliptic_curve.cpp
index 2c7afa040c..4b97e59b04 100644
--- a/src/math/elliptic_curve.cpp
+++ b/src/math/elliptic_curve.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/math/hash.cpp b/src/math/hash.cpp
index 7cd9cfa03a..d6ce1dde7c 100644
--- a/src/math/hash.cpp
+++ b/src/math/hash.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/math/secp256k1_initializer.cpp b/src/math/secp256k1_initializer.cpp
index 3b4b30f106..c69a4c7c1b 100644
--- a/src/math/secp256k1_initializer.cpp
+++ b/src/math/secp256k1_initializer.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/math/secp256k1_initializer.hpp b/src/math/secp256k1_initializer.hpp
index 5d5b97516a..ea1e44ae87 100644
--- a/src/math/secp256k1_initializer.hpp
+++ b/src/math/secp256k1_initializer.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/math/stealth.cpp b/src/math/stealth.cpp
index 278c371357..40b4ecc6f7 100644
--- a/src/math/stealth.cpp
+++ b/src/math/stealth.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/message/address.cpp b/src/message/address.cpp
index aad3a7bc9a..e9ac869356 100644
--- a/src/message/address.cpp
+++ b/src/message/address.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/message/alert.cpp b/src/message/alert.cpp
index d16eedaeec..bb9a171609 100644
--- a/src/message/alert.cpp
+++ b/src/message/alert.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/message/alert_payload.cpp b/src/message/alert_payload.cpp
index 14ab4ccd1c..5c460abdde 100644
--- a/src/message/alert_payload.cpp
+++ b/src/message/alert_payload.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/message/block.cpp b/src/message/block.cpp
index 9a5ac34246..cf8602c1b0 100644
--- a/src/message/block.cpp
+++ b/src/message/block.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/message/block_transactions.cpp b/src/message/block_transactions.cpp
index 95feae15ee..51b361a5bf 100644
--- a/src/message/block_transactions.cpp
+++ b/src/message/block_transactions.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/message/compact_block.cpp b/src/message/compact_block.cpp
index 1573090012..c750891966 100644
--- a/src/message/compact_block.cpp
+++ b/src/message/compact_block.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/message/fee_filter.cpp b/src/message/fee_filter.cpp
index 8dbdc864e9..d354154625 100644
--- a/src/message/fee_filter.cpp
+++ b/src/message/fee_filter.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/message/filter_add.cpp b/src/message/filter_add.cpp
index e5f4d4d65e..9f28c2264f 100644
--- a/src/message/filter_add.cpp
+++ b/src/message/filter_add.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/message/filter_clear.cpp b/src/message/filter_clear.cpp
index 4686270d03..71f7d0a00d 100644
--- a/src/message/filter_clear.cpp
+++ b/src/message/filter_clear.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/message/filter_load.cpp b/src/message/filter_load.cpp
index 497b861bbc..3dd00d6860 100644
--- a/src/message/filter_load.cpp
+++ b/src/message/filter_load.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/message/get_address.cpp b/src/message/get_address.cpp
index cfca1ccb9d..c4fa3b51da 100644
--- a/src/message/get_address.cpp
+++ b/src/message/get_address.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/message/get_block_transactions.cpp b/src/message/get_block_transactions.cpp
index 7c7b97069c..97db9d68bf 100644
--- a/src/message/get_block_transactions.cpp
+++ b/src/message/get_block_transactions.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/message/get_blocks.cpp b/src/message/get_blocks.cpp
index 54607c5744..5a19e9150b 100644
--- a/src/message/get_blocks.cpp
+++ b/src/message/get_blocks.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/message/get_data.cpp b/src/message/get_data.cpp
index dc0730b425..4acf6d6535 100644
--- a/src/message/get_data.cpp
+++ b/src/message/get_data.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/message/get_headers.cpp b/src/message/get_headers.cpp
index fb3768ad22..6194e4abf1 100644
--- a/src/message/get_headers.cpp
+++ b/src/message/get_headers.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/message/header.cpp b/src/message/header.cpp
index b2fb3cc632..f3da0b96ad 100644
--- a/src/message/header.cpp
+++ b/src/message/header.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/message/headers.cpp b/src/message/headers.cpp
index c9d092d1d8..fb5391e1fc 100644
--- a/src/message/headers.cpp
+++ b/src/message/headers.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/message/heading.cpp b/src/message/heading.cpp
index aab901d2c1..15d1bfc52f 100644
--- a/src/message/heading.cpp
+++ b/src/message/heading.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/message/inventory.cpp b/src/message/inventory.cpp
index e61740f241..5f76e666ac 100644
--- a/src/message/inventory.cpp
+++ b/src/message/inventory.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/message/inventory_vector.cpp b/src/message/inventory_vector.cpp
index 1c81a6d527..3fd9d93044 100644
--- a/src/message/inventory_vector.cpp
+++ b/src/message/inventory_vector.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/message/memory_pool.cpp b/src/message/memory_pool.cpp
index d64034ca5f..a11f27e32d 100644
--- a/src/message/memory_pool.cpp
+++ b/src/message/memory_pool.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/message/merkle_block.cpp b/src/message/merkle_block.cpp
index 592fd52c98..42f1caa7eb 100644
--- a/src/message/merkle_block.cpp
+++ b/src/message/merkle_block.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/message/messages.cpp b/src/message/messages.cpp
index bdebf4b60d..f1f2c768d0 100644
--- a/src/message/messages.cpp
+++ b/src/message/messages.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/message/network_address.cpp b/src/message/network_address.cpp
index 251eecd79d..134bf88869 100644
--- a/src/message/network_address.cpp
+++ b/src/message/network_address.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/message/not_found.cpp b/src/message/not_found.cpp
index 9154c6d576..7e6a69dae6 100644
--- a/src/message/not_found.cpp
+++ b/src/message/not_found.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/message/ping.cpp b/src/message/ping.cpp
index b256299558..4838f64e3a 100644
--- a/src/message/ping.cpp
+++ b/src/message/ping.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/message/pong.cpp b/src/message/pong.cpp
index a9f9f304d5..981ec4c671 100644
--- a/src/message/pong.cpp
+++ b/src/message/pong.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/message/prefilled_transaction.cpp b/src/message/prefilled_transaction.cpp
index d63f2e1f9c..e71d52a842 100644
--- a/src/message/prefilled_transaction.cpp
+++ b/src/message/prefilled_transaction.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/message/reject.cpp b/src/message/reject.cpp
index cfedef107a..85550cb7f2 100644
--- a/src/message/reject.cpp
+++ b/src/message/reject.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/message/send_compact.cpp b/src/message/send_compact.cpp
index 4f8ff8e879..6d34de1381 100644
--- a/src/message/send_compact.cpp
+++ b/src/message/send_compact.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/message/send_headers.cpp b/src/message/send_headers.cpp
index c589940b4e..3ae3191775 100644
--- a/src/message/send_headers.cpp
+++ b/src/message/send_headers.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/message/transaction.cpp b/src/message/transaction.cpp
index d076f4ec25..b80a4f3781 100644
--- a/src/message/transaction.cpp
+++ b/src/message/transaction.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/message/verack.cpp b/src/message/verack.cpp
index 1a60814932..dc58fbe0fe 100644
--- a/src/message/verack.cpp
+++ b/src/message/verack.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/message/version.cpp b/src/message/version.cpp
index 8338443981..e731f2c9d1 100644
--- a/src/message/version.cpp
+++ b/src/message/version.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/unicode/console_streambuf.cpp b/src/unicode/console_streambuf.cpp
index 2777ed5b44..c4777c2442 100644
--- a/src/unicode/console_streambuf.cpp
+++ b/src/unicode/console_streambuf.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2019 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/unicode/ifstream.cpp b/src/unicode/ifstream.cpp
index 6b04a9e049..15b3324e3c 100644
--- a/src/unicode/ifstream.cpp
+++ b/src/unicode/ifstream.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/unicode/ofstream.cpp b/src/unicode/ofstream.cpp
index 297bd4a33e..aed3caf8d6 100644
--- a/src/unicode/ofstream.cpp
+++ b/src/unicode/ofstream.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/unicode/unicode.cpp b/src/unicode/unicode.cpp
index dd4993b7d3..78ff8398a7 100644
--- a/src/unicode/unicode.cpp
+++ b/src/unicode/unicode.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2019 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/unicode/unicode_istream.cpp b/src/unicode/unicode_istream.cpp
index 098cb947ec..d67e9252e1 100644
--- a/src/unicode/unicode_istream.cpp
+++ b/src/unicode/unicode_istream.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/unicode/unicode_ostream.cpp b/src/unicode/unicode_ostream.cpp
index 522c9a0d5a..dcca42f48d 100644
--- a/src/unicode/unicode_ostream.cpp
+++ b/src/unicode/unicode_ostream.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/unicode/unicode_streambuf.cpp b/src/unicode/unicode_streambuf.cpp
index b3315d9cd5..d340478e1e 100644
--- a/src/unicode/unicode_streambuf.cpp
+++ b/src/unicode/unicode_streambuf.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/utility/binary.cpp b/src/utility/binary.cpp
index c9e6f0bc5a..efd97ae23e 100644
--- a/src/utility/binary.cpp
+++ b/src/utility/binary.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/utility/conditional_lock.cpp b/src/utility/conditional_lock.cpp
index 9eaf70e645..d5fe0c0723 100644
--- a/src/utility/conditional_lock.cpp
+++ b/src/utility/conditional_lock.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/utility/deadline.cpp b/src/utility/deadline.cpp
index 71c1effd85..eacfe08fb7 100644
--- a/src/utility/deadline.cpp
+++ b/src/utility/deadline.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/utility/dispatcher.cpp b/src/utility/dispatcher.cpp
index 704ba60742..d2cc2dd085 100644
--- a/src/utility/dispatcher.cpp
+++ b/src/utility/dispatcher.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/utility/flush_lock.cpp b/src/utility/flush_lock.cpp
index 067e16f388..31d771be62 100644
--- a/src/utility/flush_lock.cpp
+++ b/src/utility/flush_lock.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/utility/interprocess_lock.cpp b/src/utility/interprocess_lock.cpp
index 7a199d41b6..e466d13932 100644
--- a/src/utility/interprocess_lock.cpp
+++ b/src/utility/interprocess_lock.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/utility/istream_reader.cpp b/src/utility/istream_reader.cpp
index fad868233b..9703394db4 100644
--- a/src/utility/istream_reader.cpp
+++ b/src/utility/istream_reader.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/utility/monitor.cpp b/src/utility/monitor.cpp
index 792af82ca2..26df29fd3c 100644
--- a/src/utility/monitor.cpp
+++ b/src/utility/monitor.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/utility/ostream_writer.cpp b/src/utility/ostream_writer.cpp
index 8a290487af..8be01c897d 100644
--- a/src/utility/ostream_writer.cpp
+++ b/src/utility/ostream_writer.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/utility/png.cpp b/src/utility/png.cpp
index 4998212d02..1550b9dfda 100644
--- a/src/utility/png.cpp
+++ b/src/utility/png.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/utility/prioritized_mutex.cpp b/src/utility/prioritized_mutex.cpp
index 1679b2f230..6b818ddaba 100644
--- a/src/utility/prioritized_mutex.cpp
+++ b/src/utility/prioritized_mutex.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/utility/pseudo_random.cpp b/src/utility/pseudo_random.cpp
index 6b0aa8320b..36011b800e 100644
--- a/src/utility/pseudo_random.cpp
+++ b/src/utility/pseudo_random.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/utility/scope_lock.cpp b/src/utility/scope_lock.cpp
index 5ac7701eda..cf7a566f8c 100644
--- a/src/utility/scope_lock.cpp
+++ b/src/utility/scope_lock.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/utility/sequencer.cpp b/src/utility/sequencer.cpp
index 176f739a26..8fa43ae15a 100644
--- a/src/utility/sequencer.cpp
+++ b/src/utility/sequencer.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/utility/sequential_lock.cpp b/src/utility/sequential_lock.cpp
index 36d38795e3..fae797605a 100644
--- a/src/utility/sequential_lock.cpp
+++ b/src/utility/sequential_lock.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/utility/socket.cpp b/src/utility/socket.cpp
index d7fdea2563..b3f077552b 100644
--- a/src/utility/socket.cpp
+++ b/src/utility/socket.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/utility/string.cpp b/src/utility/string.cpp
index a8a50ef1fa..bd25b2debd 100644
--- a/src/utility/string.cpp
+++ b/src/utility/string.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/utility/thread.cpp b/src/utility/thread.cpp
index f3f946fce5..379db3a034 100644
--- a/src/utility/thread.cpp
+++ b/src/utility/thread.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/utility/threadpool.cpp b/src/utility/threadpool.cpp
index 54625c52af..d8866caa43 100644
--- a/src/utility/threadpool.cpp
+++ b/src/utility/threadpool.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/utility/work.cpp b/src/utility/work.cpp
index f4c33e102d..7d1e94fe03 100644
--- a/src/utility/work.cpp
+++ b/src/utility/work.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/wallet/bitcoin_uri.cpp b/src/wallet/bitcoin_uri.cpp
index 1f2e29212f..267f023d0e 100644
--- a/src/wallet/bitcoin_uri.cpp
+++ b/src/wallet/bitcoin_uri.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/wallet/dictionary.cpp b/src/wallet/dictionary.cpp
index ad8e5a1f4c..35c77c479d 100644
--- a/src/wallet/dictionary.cpp
+++ b/src/wallet/dictionary.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/wallet/ec_private.cpp b/src/wallet/ec_private.cpp
index 12751683d4..991ce8fd49 100644
--- a/src/wallet/ec_private.cpp
+++ b/src/wallet/ec_private.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/wallet/ec_public.cpp b/src/wallet/ec_public.cpp
index c5c7399ab4..311d8572e6 100644
--- a/src/wallet/ec_public.cpp
+++ b/src/wallet/ec_public.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/wallet/ek_private.cpp b/src/wallet/ek_private.cpp
index d90c38d928..5f9c8f15a1 100644
--- a/src/wallet/ek_private.cpp
+++ b/src/wallet/ek_private.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/wallet/ek_public.cpp b/src/wallet/ek_public.cpp
index 0e23e58edc..5513aa1ab6 100644
--- a/src/wallet/ek_public.cpp
+++ b/src/wallet/ek_public.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/wallet/ek_token.cpp b/src/wallet/ek_token.cpp
index 22bbc877b1..39fce5db65 100644
--- a/src/wallet/ek_token.cpp
+++ b/src/wallet/ek_token.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/wallet/electrum.cpp b/src/wallet/electrum.cpp
index d52e5d73d6..cc7156c52e 100644
--- a/src/wallet/electrum.cpp
+++ b/src/wallet/electrum.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2019 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/wallet/electrum_dictionary.cpp b/src/wallet/electrum_dictionary.cpp
index b2ab020f90..797914a26a 100644
--- a/src/wallet/electrum_dictionary.cpp
+++ b/src/wallet/electrum_dictionary.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2019 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/wallet/encrypted_keys.cpp b/src/wallet/encrypted_keys.cpp
index 3a5d8b8576..bfd8a51cf6 100644
--- a/src/wallet/encrypted_keys.cpp
+++ b/src/wallet/encrypted_keys.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2019 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/wallet/hd_private.cpp b/src/wallet/hd_private.cpp
index e5785b21c0..458513f2b0 100644
--- a/src/wallet/hd_private.cpp
+++ b/src/wallet/hd_private.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/wallet/hd_public.cpp b/src/wallet/hd_public.cpp
index 783862b844..b7c4c7bd74 100644
--- a/src/wallet/hd_public.cpp
+++ b/src/wallet/hd_public.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/wallet/message.cpp b/src/wallet/message.cpp
index 12e1c5fb5b..e58eef7b20 100644
--- a/src/wallet/message.cpp
+++ b/src/wallet/message.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/wallet/mini_keys.cpp b/src/wallet/mini_keys.cpp
index 415a036288..96d5511e7e 100644
--- a/src/wallet/mini_keys.cpp
+++ b/src/wallet/mini_keys.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/wallet/mnemonic.cpp b/src/wallet/mnemonic.cpp
index a26f040820..6a07463099 100644
--- a/src/wallet/mnemonic.cpp
+++ b/src/wallet/mnemonic.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/wallet/parse_encrypted_keys/parse_encrypted_key.hpp b/src/wallet/parse_encrypted_keys/parse_encrypted_key.hpp
index ef9c51af90..12ba486163 100644
--- a/src/wallet/parse_encrypted_keys/parse_encrypted_key.hpp
+++ b/src/wallet/parse_encrypted_keys/parse_encrypted_key.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/wallet/parse_encrypted_keys/parse_encrypted_key.ipp b/src/wallet/parse_encrypted_keys/parse_encrypted_key.ipp
index 007f338fc2..51cc5dd14e 100644
--- a/src/wallet/parse_encrypted_keys/parse_encrypted_key.ipp
+++ b/src/wallet/parse_encrypted_keys/parse_encrypted_key.ipp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/wallet/parse_encrypted_keys/parse_encrypted_prefix.hpp b/src/wallet/parse_encrypted_keys/parse_encrypted_prefix.hpp
index 8b909a2abf..11b54c4e6c 100644
--- a/src/wallet/parse_encrypted_keys/parse_encrypted_prefix.hpp
+++ b/src/wallet/parse_encrypted_keys/parse_encrypted_prefix.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/wallet/parse_encrypted_keys/parse_encrypted_prefix.ipp b/src/wallet/parse_encrypted_keys/parse_encrypted_prefix.ipp
index 4fd3c974df..8f8e667032 100644
--- a/src/wallet/parse_encrypted_keys/parse_encrypted_prefix.ipp
+++ b/src/wallet/parse_encrypted_keys/parse_encrypted_prefix.ipp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/wallet/parse_encrypted_keys/parse_encrypted_private.cpp b/src/wallet/parse_encrypted_keys/parse_encrypted_private.cpp
index d7c54ce440..ad55d6083c 100644
--- a/src/wallet/parse_encrypted_keys/parse_encrypted_private.cpp
+++ b/src/wallet/parse_encrypted_keys/parse_encrypted_private.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/wallet/parse_encrypted_keys/parse_encrypted_private.hpp b/src/wallet/parse_encrypted_keys/parse_encrypted_private.hpp
index 2994332920..e4370d4ae7 100644
--- a/src/wallet/parse_encrypted_keys/parse_encrypted_private.hpp
+++ b/src/wallet/parse_encrypted_keys/parse_encrypted_private.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/wallet/parse_encrypted_keys/parse_encrypted_public.cpp b/src/wallet/parse_encrypted_keys/parse_encrypted_public.cpp
index a90c9e54ac..9d663e6fee 100644
--- a/src/wallet/parse_encrypted_keys/parse_encrypted_public.cpp
+++ b/src/wallet/parse_encrypted_keys/parse_encrypted_public.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/wallet/parse_encrypted_keys/parse_encrypted_public.hpp b/src/wallet/parse_encrypted_keys/parse_encrypted_public.hpp
index ea4f685002..aed5e51f56 100644
--- a/src/wallet/parse_encrypted_keys/parse_encrypted_public.hpp
+++ b/src/wallet/parse_encrypted_keys/parse_encrypted_public.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/wallet/parse_encrypted_keys/parse_encrypted_token.cpp b/src/wallet/parse_encrypted_keys/parse_encrypted_token.cpp
index 3ea9ff54cc..e41d092458 100644
--- a/src/wallet/parse_encrypted_keys/parse_encrypted_token.cpp
+++ b/src/wallet/parse_encrypted_keys/parse_encrypted_token.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/wallet/parse_encrypted_keys/parse_encrypted_token.hpp b/src/wallet/parse_encrypted_keys/parse_encrypted_token.hpp
index bfafacbe3b..5a826e3bea 100644
--- a/src/wallet/parse_encrypted_keys/parse_encrypted_token.hpp
+++ b/src/wallet/parse_encrypted_keys/parse_encrypted_token.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/wallet/payment_address.cpp b/src/wallet/payment_address.cpp
index ff2d3100c9..4b9b4be3c0 100644
--- a/src/wallet/payment_address.cpp
+++ b/src/wallet/payment_address.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/wallet/qrcode.cpp b/src/wallet/qrcode.cpp
index af4f4ee6d9..a40b20214d 100644
--- a/src/wallet/qrcode.cpp
+++ b/src/wallet/qrcode.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/wallet/select_outputs.cpp b/src/wallet/select_outputs.cpp
index 0231ccf2f2..cec2beb935 100644
--- a/src/wallet/select_outputs.cpp
+++ b/src/wallet/select_outputs.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/wallet/stealth_address.cpp b/src/wallet/stealth_address.cpp
index e3f8677eb7..1f674d720a 100644
--- a/src/wallet/stealth_address.cpp
+++ b/src/wallet/stealth_address.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/wallet/stealth_receiver.cpp b/src/wallet/stealth_receiver.cpp
index 13f404afd7..429d393ac4 100644
--- a/src/wallet/stealth_receiver.cpp
+++ b/src/wallet/stealth_receiver.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/wallet/stealth_sender.cpp b/src/wallet/stealth_sender.cpp
index f1eb0b20c0..1b0ac0ac38 100644
--- a/src/wallet/stealth_sender.cpp
+++ b/src/wallet/stealth_sender.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/wallet/uri.cpp b/src/wallet/uri.cpp
index 840986797d..a430fcc1a6 100644
--- a/src/wallet/uri.cpp
+++ b/src/wallet/uri.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/chain/block.cpp b/test/chain/block.cpp
index 79cb4bfbf8..a2ff5d8f06 100644
--- a/test/chain/block.cpp
+++ b/test/chain/block.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/chain/compact.cpp b/test/chain/compact.cpp
index f99f906271..698a1aa379 100644
--- a/test/chain/compact.cpp
+++ b/test/chain/compact.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/chain/header.cpp b/test/chain/header.cpp
index a1da65c25b..038510c44a 100644
--- a/test/chain/header.cpp
+++ b/test/chain/header.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/chain/input.cpp b/test/chain/input.cpp
index ec60ed9961..27d27ac7ce 100644
--- a/test/chain/input.cpp
+++ b/test/chain/input.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/chain/output.cpp b/test/chain/output.cpp
index 4963f7b682..05f28b6fba 100644
--- a/test/chain/output.cpp
+++ b/test/chain/output.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/chain/output_point.cpp b/test/chain/output_point.cpp
index 97ea37ff61..5c37f421cc 100644
--- a/test/chain/output_point.cpp
+++ b/test/chain/output_point.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/chain/point.cpp b/test/chain/point.cpp
index 401b191527..9323c72820 100644
--- a/test/chain/point.cpp
+++ b/test/chain/point.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/chain/point_iterator.cpp b/test/chain/point_iterator.cpp
index f7cb55e632..a3f04b3635 100644
--- a/test/chain/point_iterator.cpp
+++ b/test/chain/point_iterator.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/chain/point_value.cpp b/test/chain/point_value.cpp
index 925ae429a5..91e15556dc 100644
--- a/test/chain/point_value.cpp
+++ b/test/chain/point_value.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/chain/points_value.cpp b/test/chain/points_value.cpp
index a1863d1c71..fab046189d 100644
--- a/test/chain/points_value.cpp
+++ b/test/chain/points_value.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/chain/satoshi_words.cpp b/test/chain/satoshi_words.cpp
index 4fd4785bc5..f4e964ce08 100644
--- a/test/chain/satoshi_words.cpp
+++ b/test/chain/satoshi_words.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/chain/script.cpp b/test/chain/script.cpp
index c844aa4a0d..79ef3c51e3 100644
--- a/test/chain/script.cpp
+++ b/test/chain/script.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/chain/script.hpp b/test/chain/script.hpp
index 4ca432b1e0..a8fc775649 100644
--- a/test/chain/script.hpp
+++ b/test/chain/script.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/chain/transaction.cpp b/test/chain/transaction.cpp
index 56045c2400..55576e304f 100644
--- a/test/chain/transaction.cpp
+++ b/test/chain/transaction.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/config/authority.cpp b/test/config/authority.cpp
index 3b436db6c7..e5b67a76a0 100644
--- a/test/config/authority.cpp
+++ b/test/config/authority.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/config/base58.cpp b/test/config/base58.cpp
index 5ec64b63dc..04ef0f6552 100644
--- a/test/config/base58.cpp
+++ b/test/config/base58.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/config/checkpoint.cpp b/test/config/checkpoint.cpp
index 58fd745645..19c3b0a750 100644
--- a/test/config/checkpoint.cpp
+++ b/test/config/checkpoint.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/config/endpoint.cpp b/test/config/endpoint.cpp
index fd535b9ddf..883bf1f233 100644
--- a/test/config/endpoint.cpp
+++ b/test/config/endpoint.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/config/hash256.cpp b/test/config/hash256.cpp
index f8969fd246..407cc23997 100644
--- a/test/config/hash256.cpp
+++ b/test/config/hash256.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/config/parameter.cpp b/test/config/parameter.cpp
index 9eb9a64a19..8ad7d11759 100644
--- a/test/config/parameter.cpp
+++ b/test/config/parameter.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/config/printer.cpp b/test/config/printer.cpp
index 28abb73f0d..085aa47d05 100644
--- a/test/config/printer.cpp
+++ b/test/config/printer.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/formats/base_10.cpp b/test/formats/base_10.cpp
index 833ecae812..aaf406096f 100644
--- a/test/formats/base_10.cpp
+++ b/test/formats/base_10.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/formats/base_16.cpp b/test/formats/base_16.cpp
index c94af21fe7..61527a48b9 100644
--- a/test/formats/base_16.cpp
+++ b/test/formats/base_16.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/formats/base_58.cpp b/test/formats/base_58.cpp
index bb19cc2348..e6c02bbbce 100644
--- a/test/formats/base_58.cpp
+++ b/test/formats/base_58.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/formats/base_64.cpp b/test/formats/base_64.cpp
index c2ce0cd861..9cb31bc418 100644
--- a/test/formats/base_64.cpp
+++ b/test/formats/base_64.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/formats/base_85.cpp b/test/formats/base_85.cpp
index c30b81ec4f..9fdb8e3e06 100644
--- a/test/formats/base_85.cpp
+++ b/test/formats/base_85.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/machine/number.cpp b/test/machine/number.cpp
index b03c2c67ce..167993453f 100644
--- a/test/machine/number.cpp
+++ b/test/machine/number.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/machine/number.hpp b/test/machine/number.hpp
index 650bd71f5f..142baee070 100644
--- a/test/machine/number.hpp
+++ b/test/machine/number.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/machine/opcode.cpp b/test/machine/opcode.cpp
index bf2a734acc..efa04ee135 100644
--- a/test/machine/opcode.cpp
+++ b/test/machine/opcode.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/machine/operation.cpp b/test/machine/operation.cpp
index c9bf600a02..39be8eebf0 100644
--- a/test/machine/operation.cpp
+++ b/test/machine/operation.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/main.cpp b/test/main.cpp
index 1394c14a03..2285d6f544 100644
--- a/test/main.cpp
+++ b/test/main.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/math/checksum.cpp b/test/math/checksum.cpp
index 0212c83a98..a05ff37ead 100644
--- a/test/math/checksum.cpp
+++ b/test/math/checksum.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/math/elliptic_curve.cpp b/test/math/elliptic_curve.cpp
index 5c28da9629..c4080bc288 100644
--- a/test/math/elliptic_curve.cpp
+++ b/test/math/elliptic_curve.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/math/hash.cpp b/test/math/hash.cpp
index 83534e2608..a3131e316e 100644
--- a/test/math/hash.cpp
+++ b/test/math/hash.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/math/hash.hpp b/test/math/hash.hpp
index ab51dcce96..3f9f0cced7 100644
--- a/test/math/hash.hpp
+++ b/test/math/hash.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/math/limits.cpp b/test/math/limits.cpp
index fad801e37f..89a19d74f8 100644
--- a/test/math/limits.cpp
+++ b/test/math/limits.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/math/stealth.cpp b/test/math/stealth.cpp
index 0ba652cc2d..24a28c7725 100644
--- a/test/math/stealth.cpp
+++ b/test/math/stealth.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/math/uint256.cpp b/test/math/uint256.cpp
index e184d53424..a1e187cd5d 100644
--- a/test/math/uint256.cpp
+++ b/test/math/uint256.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/message/address.cpp b/test/message/address.cpp
index 423ef8d16b..323784681a 100644
--- a/test/message/address.cpp
+++ b/test/message/address.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/message/alert.cpp b/test/message/alert.cpp
index 83ccf2dc6d..b8cd9747f5 100644
--- a/test/message/alert.cpp
+++ b/test/message/alert.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/message/alert_payload.cpp b/test/message/alert_payload.cpp
index df34ea9d50..1d2e20dbed 100644
--- a/test/message/alert_payload.cpp
+++ b/test/message/alert_payload.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/message/block.cpp b/test/message/block.cpp
index cdbcfe3cb5..3b49f79d49 100644
--- a/test/message/block.cpp
+++ b/test/message/block.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/message/block_transactions.cpp b/test/message/block_transactions.cpp
index 8ade2ef16e..d4a9be1eed 100644
--- a/test/message/block_transactions.cpp
+++ b/test/message/block_transactions.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/message/compact_block.cpp b/test/message/compact_block.cpp
index e59d2e78db..5d41dd8575 100644
--- a/test/message/compact_block.cpp
+++ b/test/message/compact_block.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/message/fee_filter.cpp b/test/message/fee_filter.cpp
index 7805998f7d..366ed47286 100644
--- a/test/message/fee_filter.cpp
+++ b/test/message/fee_filter.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/message/filter_add.cpp b/test/message/filter_add.cpp
index 5920d818ed..27aa17ed80 100644
--- a/test/message/filter_add.cpp
+++ b/test/message/filter_add.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/message/filter_clear.cpp b/test/message/filter_clear.cpp
index a8aa1440a5..829a9215c1 100644
--- a/test/message/filter_clear.cpp
+++ b/test/message/filter_clear.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/message/filter_load.cpp b/test/message/filter_load.cpp
index 59fb00fc92..4afb41fd1a 100644
--- a/test/message/filter_load.cpp
+++ b/test/message/filter_load.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/message/get_address.cpp b/test/message/get_address.cpp
index e6c8ab6ed6..5878992acc 100644
--- a/test/message/get_address.cpp
+++ b/test/message/get_address.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/message/get_block_transactions.cpp b/test/message/get_block_transactions.cpp
index b2d4a31057..bff062c9e9 100644
--- a/test/message/get_block_transactions.cpp
+++ b/test/message/get_block_transactions.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/message/get_blocks.cpp b/test/message/get_blocks.cpp
index c8d3a7a9c9..a665058576 100644
--- a/test/message/get_blocks.cpp
+++ b/test/message/get_blocks.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/message/get_data.cpp b/test/message/get_data.cpp
index ee6530d6d9..b2d8dd77b1 100644
--- a/test/message/get_data.cpp
+++ b/test/message/get_data.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/message/get_headers.cpp b/test/message/get_headers.cpp
index 5ad2f64422..6f85fa06c8 100644
--- a/test/message/get_headers.cpp
+++ b/test/message/get_headers.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/message/header.cpp b/test/message/header.cpp
index 8a0defe709..3eca67d258 100644
--- a/test/message/header.cpp
+++ b/test/message/header.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/message/headers.cpp b/test/message/headers.cpp
index 13e9a055e7..26b332b926 100644
--- a/test/message/headers.cpp
+++ b/test/message/headers.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/message/heading.cpp b/test/message/heading.cpp
index b8cbb256b6..e11c108c7f 100644
--- a/test/message/heading.cpp
+++ b/test/message/heading.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/message/inventory.cpp b/test/message/inventory.cpp
index bdc8b14512..8d551df277 100644
--- a/test/message/inventory.cpp
+++ b/test/message/inventory.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/message/inventory_vector.cpp b/test/message/inventory_vector.cpp
index 5c66ae5ff1..3c3bad5906 100644
--- a/test/message/inventory_vector.cpp
+++ b/test/message/inventory_vector.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/message/memory_pool.cpp b/test/message/memory_pool.cpp
index 5418b1cdec..de34dff409 100644
--- a/test/message/memory_pool.cpp
+++ b/test/message/memory_pool.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/message/merkle_block.cpp b/test/message/merkle_block.cpp
index 9d7134de56..772932b7e2 100644
--- a/test/message/merkle_block.cpp
+++ b/test/message/merkle_block.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/message/messages.cpp b/test/message/messages.cpp
index 2d22172d98..7832a73722 100644
--- a/test/message/messages.cpp
+++ b/test/message/messages.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/message/network_address.cpp b/test/message/network_address.cpp
index 7fff5ff1b5..e42c8c399a 100644
--- a/test/message/network_address.cpp
+++ b/test/message/network_address.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/message/not_found.cpp b/test/message/not_found.cpp
index 9abd456903..08c8d2fade 100644
--- a/test/message/not_found.cpp
+++ b/test/message/not_found.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/message/ping.cpp b/test/message/ping.cpp
index 1a8b6abc0d..0d4de27be4 100644
--- a/test/message/ping.cpp
+++ b/test/message/ping.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/message/pong.cpp b/test/message/pong.cpp
index b8b6f27a27..b8c4e6bb7c 100644
--- a/test/message/pong.cpp
+++ b/test/message/pong.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/message/prefilled_transaction.cpp b/test/message/prefilled_transaction.cpp
index ffc965000e..1ad617cb56 100644
--- a/test/message/prefilled_transaction.cpp
+++ b/test/message/prefilled_transaction.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/message/reject.cpp b/test/message/reject.cpp
index 95388fa23c..5a085ccc79 100644
--- a/test/message/reject.cpp
+++ b/test/message/reject.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/message/send_compact.cpp b/test/message/send_compact.cpp
index 5d78e46eba..b40d9e9d6d 100644
--- a/test/message/send_compact.cpp
+++ b/test/message/send_compact.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/message/send_headers.cpp b/test/message/send_headers.cpp
index 0ed447b289..1c8c95c0e9 100644
--- a/test/message/send_headers.cpp
+++ b/test/message/send_headers.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/message/transaction.cpp b/test/message/transaction.cpp
index 3321bf1b20..ad10850cbd 100644
--- a/test/message/transaction.cpp
+++ b/test/message/transaction.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/message/verack.cpp b/test/message/verack.cpp
index d645198516..812523e749 100644
--- a/test/message/verack.cpp
+++ b/test/message/verack.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/message/version.cpp b/test/message/version.cpp
index 5dd0b9979b..09de0d3662 100644
--- a/test/message/version.cpp
+++ b/test/message/version.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/unicode/unicode.cpp b/test/unicode/unicode.cpp
index 5f234bccb1..c2587fbaca 100644
--- a/test/unicode/unicode.cpp
+++ b/test/unicode/unicode.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2019 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/unicode/unicode_istream.cpp b/test/unicode/unicode_istream.cpp
index d92c1efc2e..e986bd2cc2 100644
--- a/test/unicode/unicode_istream.cpp
+++ b/test/unicode/unicode_istream.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/unicode/unicode_ostream.cpp b/test/unicode/unicode_ostream.cpp
index 86b4d47281..6c7dcf649e 100644
--- a/test/unicode/unicode_ostream.cpp
+++ b/test/unicode/unicode_ostream.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/utility/binary.cpp b/test/utility/binary.cpp
index 63643a48fa..c0b23d9f11 100644
--- a/test/utility/binary.cpp
+++ b/test/utility/binary.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/utility/collection.cpp b/test/utility/collection.cpp
index a911db6b8d..daa2477839 100644
--- a/test/utility/collection.cpp
+++ b/test/utility/collection.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/utility/data.cpp b/test/utility/data.cpp
index 5e55bbcbd8..88f80b559e 100644
--- a/test/utility/data.cpp
+++ b/test/utility/data.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/utility/endian.cpp b/test/utility/endian.cpp
index b1d25aaea9..d896737b8d 100644
--- a/test/utility/endian.cpp
+++ b/test/utility/endian.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/utility/png.cpp b/test/utility/png.cpp
index 1e411ebe24..60874cc594 100644
--- a/test/utility/png.cpp
+++ b/test/utility/png.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/utility/pseudo_random.cpp b/test/utility/pseudo_random.cpp
index 8b4eb989ab..28b3b31c67 100644
--- a/test/utility/pseudo_random.cpp
+++ b/test/utility/pseudo_random.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/utility/serializer.cpp b/test/utility/serializer.cpp
index 1562494b28..0395c378c0 100644
--- a/test/utility/serializer.cpp
+++ b/test/utility/serializer.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/utility/stream.cpp b/test/utility/stream.cpp
index 427380b030..7db9f20d6f 100644
--- a/test/utility/stream.cpp
+++ b/test/utility/stream.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/utility/thread.cpp b/test/utility/thread.cpp
index 12c474e93e..cb07f7d672 100644
--- a/test/utility/thread.cpp
+++ b/test/utility/thread.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/wallet/bitcoin_uri.cpp b/test/wallet/bitcoin_uri.cpp
index 969b4e4102..6632cf819e 100644
--- a/test/wallet/bitcoin_uri.cpp
+++ b/test/wallet/bitcoin_uri.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/wallet/ec_private.cpp b/test/wallet/ec_private.cpp
index 8342516d9d..656d584ed8 100644
--- a/test/wallet/ec_private.cpp
+++ b/test/wallet/ec_private.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/wallet/ec_public.cpp b/test/wallet/ec_public.cpp
index d9ce1ba838..6d9a9da38d 100644
--- a/test/wallet/ec_public.cpp
+++ b/test/wallet/ec_public.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/wallet/electrum.cpp b/test/wallet/electrum.cpp
index e23c8ccd8b..54efc7237a 100644
--- a/test/wallet/electrum.cpp
+++ b/test/wallet/electrum.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2019 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/wallet/encrypted_keys.cpp b/test/wallet/encrypted_keys.cpp
index ded9ec8532..e4dc9ea605 100644
--- a/test/wallet/encrypted_keys.cpp
+++ b/test/wallet/encrypted_keys.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/wallet/hd_private.cpp b/test/wallet/hd_private.cpp
index 53cb8dd1bc..2890031022 100644
--- a/test/wallet/hd_private.cpp
+++ b/test/wallet/hd_private.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/wallet/hd_public.cpp b/test/wallet/hd_public.cpp
index 487bdf9539..761d2071c7 100644
--- a/test/wallet/hd_public.cpp
+++ b/test/wallet/hd_public.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/wallet/message.cpp b/test/wallet/message.cpp
index 20f19cb9ba..029de770e7 100644
--- a/test/wallet/message.cpp
+++ b/test/wallet/message.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/wallet/mnemonic.cpp b/test/wallet/mnemonic.cpp
index f42b725b4c..9f575069e2 100644
--- a/test/wallet/mnemonic.cpp
+++ b/test/wallet/mnemonic.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/wallet/mnemonic.hpp b/test/wallet/mnemonic.hpp
index 5cc784b55c..9cd4f18e06 100644
--- a/test/wallet/mnemonic.hpp
+++ b/test/wallet/mnemonic.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/wallet/payment_address.cpp b/test/wallet/payment_address.cpp
index 0b694d2682..69da177a4d 100644
--- a/test/wallet/payment_address.cpp
+++ b/test/wallet/payment_address.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/wallet/qrcode.cpp b/test/wallet/qrcode.cpp
index 67f02e2bbb..c913ef19fb 100644
--- a/test/wallet/qrcode.cpp
+++ b/test/wallet/qrcode.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/wallet/select_outputs.cpp b/test/wallet/select_outputs.cpp
index 93086336c3..416de88d73 100644
--- a/test/wallet/select_outputs.cpp
+++ b/test/wallet/select_outputs.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/wallet/stealth_address.cpp b/test/wallet/stealth_address.cpp
index 17d42f1944..a4ecb7de11 100644
--- a/test/wallet/stealth_address.cpp
+++ b/test/wallet/stealth_address.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/wallet/stealth_receiver.cpp b/test/wallet/stealth_receiver.cpp
index f6868b99d7..b3f6cfdca6 100644
--- a/test/wallet/stealth_receiver.cpp
+++ b/test/wallet/stealth_receiver.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/wallet/stealth_sender.cpp b/test/wallet/stealth_sender.cpp
index 2c17fc2b2d..4961042a58 100644
--- a/test/wallet/stealth_sender.cpp
+++ b/test/wallet/stealth_sender.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/wallet/uri.cpp b/test/wallet/uri.cpp
index 2b32ff7712..f1e31f4ef8 100644
--- a/test/wallet/uri.cpp
+++ b/test/wallet/uri.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/wallet/uri_reader.cpp b/test/wallet/uri_reader.cpp
index 2b8de7554c..e2deab8ab3 100644
--- a/test/wallet/uri_reader.cpp
+++ b/test/wallet/uri_reader.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2017 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *