Computing on Bitcoin #43
June 13, 2025 - Week 24
Welcome to this week’s edition of Computing on Bitcoin News!
As always, we spotlight the most important developments related to Bitcoin scalability, interoperability and bridging.
Let’s dive into the latest.
TOOP (Transfer of Ownership Protocol) by Ariel Futoransky, Fadi Barbara, Ramses Fernandez, Gabriel Larotonda, and Sergio Lerner from Fairgate Labs, proposes a secure, flexible Bitcoin asset bridging system using a 1-of-n committee.
fairgate.io/publications
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TOOP: Transfer of Ownership Protocol
Our latest paper introduces the Transfer of Ownership Protocol (TOOP)—a significant advancement in the security of trust minimizing transfer protocol for assets originating on Bitcoin into other blockchains.
Bitlayer has successfully executed the first live BitVM bridge use cases on Bitcoin mainnet, including Assert and Disprove transactions.
medium.com/@Bitlayer
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First BitVM Bridge Use Case Successfully Executed on Bitcoin Mainnet
This article details two comprehensive BitVM Bridge use cases executed on the Bitcoin mainnet. Notably, one of these cases involved the processing of two distinct NSTs: an Assert transaction and a Disprove transaction. This demonstration is a powerful testament to both the BitVM Bridge’s capabilities and the success of our mining pool collaborations.
Romain Pellerin, IOHK CTO, introduces Cardinal Protocol, using BitVMX and MuSig2, enabling BTC and Ordinals to access DeFi on Cardano and beyond.
 | input-output-hk |
🧵1/ Introducing Cardinal Protocol 🟧
— Romain Pellerin🇫🇷🇺🇸 (@rom1_pellerin) June 9, 2025
A new primitive for Bitcoin:
→ Wrap any BTC UTXO
→ Find DeFi yield with it: lending, staking, borrowing
→ Trust-minimized (1-of-n honest operator)
We made history with the 1st cross-chain Ordinal wrap!
📜 https://t.co/DKT10LsrwA
Thanks for reading this edition of Computing on Bitcoin News!
We’ll be back next Friday with more technical updates, novel protocols, and boundary-pushing ideas from across the Bitcoin ecosystem.