Computing on Bitcoin #94
June 19, 2026 - Week 25
Welcome to a new edition of Computing on Bitcoin News! Here's a roundup of recent work contributing to the future of Bitcoin scalability and programmability.
Let's dive in
A new article by the Fairgate team announces that Union Bridge has gone live on Rootstock Testnet, marking a new stage in the development of BitVMX-powered Bitcoin bridging.
bitvmx.org/knowledge
🔗
Union Bridge Reaches Testnet: A Milestone for BitVMX-Powered Bitcoin Bridging
Bitcoin bridging has long been one of the most trust-intensive operations in the ecosystem. Most existing solutions rely on federations, custodians, or multisig committees: models that enabled early Bitcoin DeFi but came at the cost of counterparty risk and centralization. Union Bridge, developed jointly by Fairgate and Rootstock, is designed to change that.
A new article by the Fairgate team announces that Union Bridge has gone live on Rootstock Testnet, marking a new stage in the development of BitVMX-powered Bitcoin bridging.
spark.money/research
🔗
Zero-Knowledge Proofs on Bitcoin: From Client-Side Validation to ZK Rollups
The practical impact: RGB can now express confidential asset transfers where amounts and asset types are hidden using zero-knowledge proofs, verified entirely client-side without any on-chain computation. This model avoids the verification bottleneck that plagues other Bitcoin ZK approaches because Bitcoin's consensus layer never needs to evaluate a proof.
A new interview with Super Testnet explores the implications of BIP 110, proposed soft fork activation mechanisms, and the broader process of Bitcoin consensus changes.
BIP 110 & The Future of Soft Forks | SUPER TESTNET
youtube.com/@BitcoinRails
One of Bitcoin's most prolific experimental developers, Super Testnet is known for building software at the frontier of Bitcoin research — including notable contributions to BitVM, Drivechains, Lightning, and numerous prototypes that have pushed the boundaries of Bitcoin's design space.
Thanks for reading!
We’ll keep following the research, discussions, and deployments shaping this rapidly evolving landscape.
Until next week!
The Fairgate Team