diff --git a/AUTHORS b/AUTHORS
new file mode 100644
index 0000000..d042c1a
--- /dev/null
+++ b/AUTHORS
@@ -0,0 +1,4 @@
+# The Hush Developers
+
+Duke Leto https://git.hush.is/duke
+
diff --git a/README.md b/README.md
index 47e1a1b..bc066f5 100644
--- a/README.md
+++ b/README.md
@@ -64,3 +64,9 @@ the -p 5353 option.
 ## LICENSE
 
 GPLv3
+
+## CONTRIBUTORS
+
+See a list of people who contributed to this code in AUTHORS. If you have made
+contributions to this code, you are welcome to submit a PR adding yourself to this
+file.
diff --git a/bitcoin.cpp b/bitcoin.cpp
index 1af523f..1b50400 100644
--- a/bitcoin.cpp
+++ b/bitcoin.cpp
@@ -1,5 +1,8 @@
-#include <algorithm>
+// Copyright (c) 2018-2021 The Hush developers
+// Distributed under the GPLv3 software license, see the accompanying
+// file LICENSE or https://www.gnu.org/licenses/gpl-3.0.en.html
 
+#include <algorithm>
 #include "coin.h"
 #include "db.h"
 #include "netbase.h"
diff --git a/bitcoin.h b/bitcoin.h
index 2ae9ffe..c978556 100644
--- a/bitcoin.h
+++ b/bitcoin.h
@@ -1,3 +1,6 @@
+// Copyright (c) 2018-2021 The Hush developers
+// Distributed under the GPLv3 software license, see the accompanying
+// file LICENSE or https://www.gnu.org/licenses/gpl-3.0.en.html
 #ifndef _BITCOIN_H_
 #define _BITCOIN_H_ 1
 
diff --git a/db.cpp b/db.cpp
index 1574bfb..a096ad6 100644
--- a/db.cpp
+++ b/db.cpp
@@ -1,3 +1,6 @@
+// Copyright (c) 2018-2021 The Hush developers
+// Distributed under the GPLv3 software license, see the accompanying
+// file LICENSE or https://www.gnu.org/licenses/gpl-3.0.en.html
 #include "db.h"
 #include <stdlib.h>
 
diff --git a/db.h b/db.h
index d35dd38..d405e47 100644
--- a/db.h
+++ b/db.h
@@ -1,3 +1,6 @@
+// Copyright (c) 2018-2021 The Hush developers
+// Distributed under the GPLv3 software license, see the accompanying
+// file LICENSE or https://www.gnu.org/licenses/gpl-3.0.en.html
 #include <stdint.h>
 #include <math.h>
 
diff --git a/dns.h b/dns.h
index d1fddd7..3fefb06 100644
--- a/dns.h
+++ b/dns.h
@@ -1,3 +1,6 @@
+// Copyright (c) 2018-2021 The Hush developers
+// Distributed under the GPLv3 software license, see the accompanying
+// file LICENSE or https://www.gnu.org/licenses/gpl-3.0.en.html
 #ifndef _DNS_H_
 #define _DNS_H_ 1
 
diff --git a/main.cpp b/main.cpp
index 9901d5c..1177edb 100644
--- a/main.cpp
+++ b/main.cpp
@@ -1,3 +1,6 @@
+// Copyright (c) 2018-2021 The Hush developers
+// Distributed under the GPLv3 software license, see the accompanying
+// file LICENSE or https://www.gnu.org/licenses/gpl-3.0.en.html
 #include <algorithm>
 
 #define __STDC_FORMAT_MACROS
@@ -8,7 +11,6 @@
 #include <stdlib.h>
 #include <getopt.h>
 #include <atomic>
-
 #include "bitcoin.h"
 #include "db.h"
 
diff --git a/util.cpp b/util.cpp
index 3a87429..32a6f6c 100644
--- a/util.cpp
+++ b/util.cpp
@@ -1,3 +1,6 @@
+// Copyright (c) 2018-2021 The Hush developers
+// Distributed under the GPLv3 software license, see the accompanying
+// file LICENSE or https://www.gnu.org/licenses/gpl-3.0.en.html
 #include <stdio.h>
 #include "util.h"
 
diff --git a/util.h b/util.h
index fbcbd1f..e677654 100644
--- a/util.h
+++ b/util.h
@@ -1,3 +1,7 @@
+// Copyright (c) 2018-2021 The Hush developers
+// Distributed under the GPLv3 software license, see the accompanying
+// file LICENSE or https://www.gnu.org/licenses/gpl-3.0.en.html
+
 #ifndef _UTIL_H_
 #define _UTIL_H_ 1