diff --git a/CITATION.cff b/CITATION.cff
index 3a0487b..31234ab 100644
--- a/CITATION.cff
+++ b/CITATION.cff
@@ -10,6 +10,14 @@ authors:
 repository-code: "https://github.com/sparkainlp-x/qldpc_decoder_cpp"
 url: "https://sparkainlpx.xyz"
 license: MIT
+doi: "10.5281/zenodo.22985527"
+identifiers:
+  - type: doi
+    value: "10.5281/zenodo.22985527"
+    description: "Concept DOI (all versions, Zenodo)"
+  - type: doi
+    value: "10.5281/zenodo.22985528"
+    description: "Version DOI for v0.1.1 (Zenodo)"
 version: "0.1.1"
 date-released: "2026-09-26"
 abstract: >-
diff --git a/README.md b/README.md
index 5d08998..8a59a4a 100644
--- a/README.md
+++ b/README.md
@@ -6,6 +6,7 @@ C++/HLS **research scaffold** for a qLDPC decoder: CMake + Catch2 + a sparse GF(
 [![C++ CI](https://github.com/sparkainlp-x/qldpc_decoder_cpp/actions/workflows/ci.yml/badge.svg)](https://github.com/sparkainlp-x/qldpc_decoder_cpp/actions/workflows/ci.yml)
 [![Status: research prototype](https://img.shields.io/badge/status-research%20prototype-orange.svg)](#what-it-is-not)
 [![Hardware results: UNRUN](https://img.shields.io/badge/hardware%20results-UNRUN-lightgrey.svg)](#evidence-tags)
+[![DOI](https://zenodo.org/badge/DOI/10.5281/zenodo.22985527.svg)](https://doi.org/10.5281/zenodo.22985527)
 
 *English first; the original French documentation follows below. / La documentation originale en français suit.*
 
@@ -76,6 +77,8 @@ ADR-001 governs the OES-32 residual family (normative: [oes32-residual@b77b612](
 
 ## Citation
 
+Archived on Zenodo: concept DOI [10.5281/zenodo.22985527](https://doi.org/10.5281/zenodo.22985527) (all versions; resolves to the latest). The v0.1.1 archive is [10.5281/zenodo.22985528](https://doi.org/10.5281/zenodo.22985528).
+
 Citation metadata is in [CITATION.cff](CITATION.cff); GitHub shows a "Cite this repository" button. Please also cite the upstream [`ldpc`](https://github.com/quantumgizmos/ldpc) library by Joschka Roffe.
 
 ## License