diff --git a/pkgs/development/python-modules/opentimestamps/default.nix b/pkgs/development/python-modules/opentimestamps/default.nix
new file mode 100644
index 00000000000..1271a46f047
--- /dev/null
+++ b/pkgs/development/python-modules/opentimestamps/default.nix
@@ -0,0 +1,29 @@
+{ lib, buildPythonPackage, fetchFromGitHub, isPy3k
+, bitcoinlib, GitPython, pysha3 }:
+
+buildPythonPackage rec {
+  name = "opentimestamps-${version}";
+  version = "0.2.1";
+  disabled = (!isPy3k);
+
+  src = fetchFromGitHub {
+    owner = "opentimestamps";
+    repo = "python-opentimestamps";
+    rev = "python-opentimestamps-v0.2.1";
+    sha256 = "1cilv1ls9mdqk8zriqfkz7xcl8i1ncm0f89n4c8k4s82kf5y56rm";
+  };
+
+  # Remove a failing test which expects the test source file to reside in the
+  # project's Git repo
+  patchPhase = ''
+    rm opentimestamps/tests/core/test_git.py
+  '';
+
+  propagatedBuildInputs = [ bitcoinlib GitPython pysha3 ];
+
+  meta = {
+    description = "Create and verify OpenTimestamps proofs";
+    homepage = https://github.com/opentimestamps/python-opentimestamps;
+    license = lib.licenses.lgpl3;
+  };
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 49a99cc4939..d97d6d45d84 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -11400,6 +11400,8 @@ in {
 
   openpyxl = callPackage ../development/python-modules/openpyxl { };
 
+  opentimestamps = callPackage ../development/python-modules/opentimestamps { };
+
   ordereddict = buildPythonPackage rec {
     name = "ordereddict-${version}";
     version = "1.1";