diff --git a/README.md b/README.md
index c5b6ce4588e..6628e0a5c98 100644
--- a/README.md
+++ b/README.md
@@ -19,7 +19,7 @@ License
 -------
 
 Bitcoin Core is released under the terms of the MIT license. See [COPYING](COPYING) for more
-information or see https://opensource.org/licenses/MIT.
+information or see https://opensource.org/license/MIT.
 
 Development Process
 -------------------
diff --git a/contrib/debian/copyright b/contrib/debian/copyright
index af8a1bc0c14..4e4deef9a1f 100644
--- a/contrib/debian/copyright
+++ b/contrib/debian/copyright
@@ -121,17 +121,6 @@ Comment:
  You should have received a copy of the GNU General Public License along
  with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-License: GPL-3+
- Permission is granted to copy, distribute and/or modify this document
- under the terms of the GNU General Public License, Version 3 or any
- later version published by the Free Software Foundation.
-Comment:
- On Debian systems the GNU General Public License (GPL) version 3 is
- located in '/usr/share/common-licenses/GPL-3'.
- .
- You should have received a copy of the GNU General Public License along
- with this program.  If not, see <http://www.gnu.org/licenses/>.
-
 License: public-domain
  This work is in the public domain.
 
diff --git a/contrib/devtools/copyright_header.py b/contrib/devtools/copyright_header.py
index 3c98ee7b20d..12d7276455c 100755
--- a/contrib/devtools/copyright_header.py
+++ b/contrib/devtools/copyright_header.py
@@ -22,7 +22,6 @@ EXCLUDE = [
     'src/test/fuzz/FuzzedDataProvider.h',
     'src/tinyformat.h',
     'src/bench/nanobench.h',
-    'test/functional/test_framework/bignum.py',
     # python init:
     '*__init__.py',
 ]
@@ -94,7 +93,6 @@ EXPECTED_HOLDER_NAMES = [
     r"Satoshi Nakamoto",
     r"The Bitcoin Core developers",
     r"BitPay Inc\.",
-    r"University of Illinois at Urbana-Champaign\.",
     r"Pieter Wuille",
     r"Wladimir J\. van der Laan",
     r"Jeff Garzik",
diff --git a/src/clientversion.cpp b/src/clientversion.cpp
index 10e9472b84b..d9e65037ae4 100644
--- a/src/clientversion.cpp
+++ b/src/clientversion.cpp
@@ -96,6 +96,6 @@ std::string LicenseInfo()
            "\n" +
            "\n" +
            _("This is experimental software.") + "\n" +
-           strprintf(_("Distributed under the MIT software license, see the accompanying file %s or %s"), "COPYING", "<https://opensource.org/licenses/MIT>").translated +
+           strprintf(_("Distributed under the MIT software license, see the accompanying file %s or %s"), "COPYING", "<https://opensource.org/license/MIT>").translated +
            "\n";
 }
diff --git a/src/node/peerman_args.cpp b/src/node/peerman_args.cpp
index b0ae2663651..d1f2ca4d381 100644
--- a/src/node/peerman_args.cpp
+++ b/src/node/peerman_args.cpp
@@ -1,3 +1,7 @@
+// Copyright (c) 2023 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
 #include <node/peerman_args.h>
 
 #include <common/args.h>
diff --git a/src/node/peerman_args.h b/src/node/peerman_args.h
index 73dbdb446c2..00006a7d328 100644
--- a/src/node/peerman_args.h
+++ b/src/node/peerman_args.h
@@ -1,3 +1,7 @@
+// Copyright (c) 2023 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
 #ifndef BITCOIN_NODE_PEERMAN_ARGS_H
 #define BITCOIN_NODE_PEERMAN_ARGS_H
 
diff --git a/src/node/txdownloadman_impl.cpp b/src/node/txdownloadman_impl.cpp
index 452c75da05d..9a4daa14098 100644
--- a/src/node/txdownloadman_impl.cpp
+++ b/src/node/txdownloadman_impl.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2024
+// Copyright (c) 2024 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/node/txdownloadman_impl.h b/src/node/txdownloadman_impl.h
index d9688d0c8d8..401cd4fd14b 100644
--- a/src/node/txdownloadman_impl.h
+++ b/src/node/txdownloadman_impl.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2024
+// Copyright (c) 2024 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 #ifndef BITCOIN_NODE_TXDOWNLOADMAN_IMPL_H
diff --git a/src/test/fuzz/headerssync.cpp b/src/test/fuzz/headerssync.cpp
index 8135b0d4eab..90cc615f381 100644
--- a/src/test/fuzz/headerssync.cpp
+++ b/src/test/fuzz/headerssync.cpp
@@ -1,3 +1,7 @@
+// Copyright (c) 2022 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
 #include <arith_uint256.h>
 #include <chain.h>
 #include <chainparams.h>
diff --git a/src/test/fuzz/partially_downloaded_block.cpp b/src/test/fuzz/partially_downloaded_block.cpp
index 8c6565e48b8..11fe267cef1 100644
--- a/src/test/fuzz/partially_downloaded_block.cpp
+++ b/src/test/fuzz/partially_downloaded_block.cpp
@@ -1,3 +1,7 @@
+// Copyright (c) 2023 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or https://www.opensource.org/licenses/mit-license.php.
+
 #include <blockencodings.h>
 #include <consensus/merkle.h>
 #include <consensus/validation.h>
diff --git a/src/univalue/include/univalue_escapes.h b/src/univalue/include/univalue_escapes.h
index 83767e8ac5d..822da1f7077 100644
--- a/src/univalue/include/univalue_escapes.h
+++ b/src/univalue/include/univalue_escapes.h
@@ -1,3 +1,8 @@
+// Copyright 2014 BitPay Inc.
+// Copyright 2015 Bitcoin Core Developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or https://opensource.org/licenses/mit-license.php.
+
 #ifndef BITCOIN_UNIVALUE_INCLUDE_UNIVALUE_ESCAPES_H
 #define BITCOIN_UNIVALUE_INCLUDE_UNIVALUE_ESCAPES_H
 static const char *escapes[256] = {
diff --git a/src/univalue/test/test_json.cpp b/src/univalue/test/test_json.cpp
index f8c10238d4d..9ec095031fb 100644
--- a/src/univalue/test/test_json.cpp
+++ b/src/univalue/test/test_json.cpp
@@ -1,3 +1,8 @@
+// Copyright 2014 BitPay Inc.
+// Copyright 2015 Bitcoin Core Developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or https://opensource.org/licenses/mit-license.php.
+
 // Test program that can be called by the JSON test suite at
 // https://github.com/nst/JSONTestSuite.
 //
diff --git a/src/util/transaction_identifier.h b/src/util/transaction_identifier.h
index 81b053843df..2d9128a7120 100644
--- a/src/util/transaction_identifier.h
+++ b/src/util/transaction_identifier.h
@@ -1,3 +1,7 @@
+// Copyright (c) 2023 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
 #ifndef BITCOIN_UTIL_TRANSACTION_IDENTIFIER_H
 #define BITCOIN_UTIL_TRANSACTION_IDENTIFIER_H
 
diff --git a/src/wallet/migrate.cpp b/src/wallet/migrate.cpp
index f97ee0756c1..cb70336a603 100644
--- a/src/wallet/migrate.cpp
+++ b/src/wallet/migrate.cpp
@@ -1,3 +1,4 @@
+// Copyright (c) 2024 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/test/lint/lint_ignore_dirs.py b/test/lint/lint_ignore_dirs.py
index 7525eac341d..5541f46a934 100644
--- a/test/lint/lint_ignore_dirs.py
+++ b/test/lint/lint_ignore_dirs.py
@@ -1,3 +1,8 @@
+#!/usr/bin/env python3
+# Copyright (c) 2024 The Bitcoin Core developers
+# Distributed under the MIT software license, see the accompanying
+# file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
 SHARED_EXCLUDED_SUBTREES = ["src/leveldb/",
                  "src/crc32c/",
                  "src/secp256k1/",