Bitcoin’s security and reliability as a store of value are undeniable. However, its liquidity remained untapped for too long due to a lack of trustless bridges and native smart contract capabilities. As BTC is only native to Bitcoin’s L1, any attempt to include it in DeFi relies on the trust assumptions of third party custodians that wrap it. Build On Bitcoin (BOB) aims to expand Bitcoin’s functionality by integrating it with Ethereum’s smart contract capabilities. BOB operates as an OP Stack L2 with a hybrid design incorporating ZKPs, Bitcoin staking, and Ethereum for data availability. By functioning as a rollup, BOB processes transactions off-chain and batches them for settlement on Bitcoin and Ethereum, significantly improving transaction speed and reducing costs compared to Bitcoin’s base layer.

Topics covered in this episode:

• Alexei’s background
• Setbacks for Bitcoin DeFi
• Bitcoin bridges
• BitVM
• BOB operators and trust assumptions
• BOB architecture & Bitcoin staking
• Bitcoin LSTs
• The future of Bitcoin DeFi

Episode links:

• Alexei Zamyatin on X
• Build on Bitcoin on X

Sponsors:

• Gnosis: Gnosis builds decentralized infrastructure for the Ethereum ecosystem, since 2015. This year marks the launch of Gnosis Pay— the world's first Decentralized Payment Network. Get started today at - gnosis.io
• Chorus One: one of the largest node operators worldwide, trusted by 175,000+ accounts across more than 60 networks, Chorus One combines institutional-grade security with the highest yields at - chorus.one

This episode is hosted by Brian Fabian Crain.