To clarify, this proposal has been under active discussion on Delving Bitcoin for several weeks prior to this mailing list post. Including replies from Murch:

https://delvingbitcoin.org/t/p2wots-post-quantum-utxo-winternitz-signatures/2530

A live signet with full P2WOTS support is live for testing and a wallet demo can be interacted with from my website. I will resubmit the BIP pull request once sufficient mailing list discussion has taken place here as well.

https://block_opuslux.ar.io

Happy to answer any technical questions!

Regards,
Opus Lux

On Monday, June 8th, 2026 at 4:07 PM, opus lux <opusluxofficial@proton.me> wrote:

> Hi all,
>
> I's like to officially propose P2WOTS (Pay-to-Winternitz-One-Time-Signature), a new native Bitcoin output type using witness version three. It provides post quantum security using only SHA-256 and contains no elliptic curve key material anywhere.
>
> The 34 byte scriptPubKey commits to a Merkle Key Tree over 64 independent WOTS+ one time key pairs.
> This construction directly solves the WOTS+ one time signing limitation, each spend consumes a fresh independent slot key, making address reuse safe without ever violating the one time property.
>
> BIP draft PR:
> https://github.com/bitcoin/bips/pull/2194
>
> Looking forward to technical feedback from the community.
>
> Regards,Opus Lux

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