Label 309 · Open standard

Roadmap

The standard is designed and implemented across three languages. This is the path to a public, community-governed standard.

1. June 2026Done

   Launch the standard’s home

   This site: the spec, the plain-language ELI5 track, the practical guides, agent-readable artifacts, and links to every open-source repository.

2. Done

   Open-sourced the implementations

   Published the TypeScript and Python SDKs, the Rust SDK, the CLI, and the standard corpus under Apache-2.0 / CC-BY-4.0 — all live on npm, PyPI, and crates.io.

3. Done

   Accepted as CIP-0190

   Accepted into the official Cardano CIP process as CIP-0190. Its CIP status is Proposed, on the path to Active.

   github.com/cardano-foundation/CIPs/tree/master/CIP-0190
4. Done

   First vendor: cardanowall.com

   The full reference product — account, publish, verify, inbox, identity, billing — proving the standard end to end.

   cardanowall.com
5. July 2026Done

   Open-source the publish gateway

   The complete publish gateway is now open source. The SDKs and CLI prepare and verify records, but submitting one runs through a gateway — it holds the Cardano wallet that pays for the transaction, plus the Arweave wallet that stores a sealed file. It's a self-hostable publish backend, one Rust binary plus Postgres, that anyone can run on their own machine or online — wired into the desktop app and the CLI, and shipped both as source and as a ready-to-run Docker image. Run one privately, or operate one as a paid service for others.

   github.com/cardanowall/label-309-gateway
6. Done

   A CI/CD action for GitHub, GitLab, and beyond

   An open-source step you drop into a pipeline to anchor a Proof of Existence on every build or release. It ships as a portable core with a native GitHub Action and a GitLab CI/CD component, and runs the same way on other platforms. Set a gateway endpoint and API key in your CI secrets, and a successful run publishes a Merkle root of your files or commits, optionally with the full tree on Arweave, so any single file or commit can be proven against the on-chain root later.

   github.com/cardanowall/poe-attest
7. 7
   In progress

   Explorer support: Cardanoscan and AdaStat

   Cardanoscan already recognises label-309 metadata and renders the transaction as a full Proof of Existence — explicitly labelled as a Proof of Existence per the Label 309 standard, with every metadata field laid out and displayed correctly. AdaStat support is in progress. Either way, anyone can see and check a record in the explorer they already use.

8. 8
   Planned

   Open-source desktop apps

   Native clients so anyone can publish and verify from their own machine, fully open source.

9. 9
   August 2026Planned

   An independent reference gateway

   A second, operator-independent publish/verify API for developers and automation — same wire contract, separate operator.

10. 10
    Planned

    A wallet integration guide

    A guide for Cardano wallets to recognise, display, and verify Label 309 records natively — the bridge from the standard to everyday wallets.

11. 11
    Planned

    First wallet integrations

    The first popular Cardano wallets ship Label 309 support, so people can publish and verify without ever leaving their wallet.