Call for Participation in UTXO Web Wallet Interoperability Community Group
The UTXO Web Wallet Interoperability Community Group has been launched:
There are important use cases for self-sovereign identity in the emerging digital wallet ecosystem.
This group’s mission is to enable wallets to integrate the UTXODNS protocol (developed within the IETF) for self-sovereign identity, payment addressing, and verifiable credential presentation.
The group will publish Specifications that allow wallets to:
- Resolve .utxo domain names to multi‑chain blockchain endpoint identifiers, supporting networks such as Bitcoin (BTC), Ethereum (ETH), Solana (SOL), and any other blockchain that uses public key hashes or account‑based addresses.
- Perform self‑sovereign authentication (sign a challenge using a private key bound to a .utxo domain, without any third‑party identity provider).
- Construct and sign payments addressed to a .utxo domain on any supported chain, including stablecoins such as USDC, USDT, and Hong Kong regulated stablecoins.
- Present verifiable credentials such as GLEIF vLEI (real‑time status, selective disclosure).
The group also expects to develop a reference implementation. Native browser APIs may be considered in a future phase once wallet adoption is widespread.
In order to join the group, you will need a W3C account. Please note, however, that W3C Membership is not required to join a Community Group.
This is a community initiative. This group was originally proposed on 2026-06-07 by yidan Zhu. The following people supported its creation: yidan Zhu, shiwen tian, guorong tian, zhiqiang sheng and youli wang. W3C’s hosting of this group does not imply endorsement of the activities.
The group must now choose a chair. Read more about how to get started in a new group and good practice for running a group.
We invite you to share news of this new group on social media and other channels.
If you believe that there is an issue with this group that requires the attention of the W3C staff, please email us at site-comments@w3.org
Thank you,
W3C Community Development Team
