BOB (Build on Bitcoin) Hybrid L2 combining Bitcoin and Ethereum. Built on Optimism's OP Stack but with Bitcoin-anchored security mechanisms. Architecture - OP Stack for execution (Optimistic rollup style). - Anchored to Ethereum for data availability + initial security. - Bitcoin anchoring : state hashes also committed to Bitcoin via inscriptions / Taproot commitments. - Bridges : native to Ethereum, with Bitcoin via federation + zk proofs. Hybrid security The "hybrid" model means BOB inherits both: - Ethereum's data availability + fraud proofs. - Bitcoin's PoW for state finality (via anchori…