On October 24, 2025, OxDavinci printed a BTCBwBTC bridge, the BTCtowBTC Bridge, marking a brand new step in blockchain interoperability. BOB is a finality-based hybrid layer 2 community primarily based on the Bitcoin blockchain and is an EVM-compatible optimistic rollup. This design makes it doable to undertake Bitcoin's safety ensures and apply developer instruments to create Ethereum functions comparable to Solidity, Truffle, and Hardhat. This integration will let you deploy DeFi, AI, and privacy-oriented functions with out shifting BTC off-chain or leveraging wrapped tokens.
For a few years, the ability of Bitcoin was locked inside its personal partitions, protected and confirmed, however remoted. @build_on_bob adjustments this by combining the safety of Bitcoin with the pliability of Ethereum.
It's not about shifting BTC off-chain or wrapping it someplace else, it's about increasing Bitcoin… pic.twitter.com/dRx3GU0WRA
— Da Vinci (@OxDavinci) October 24, 2025
Technical background and financial results
In distinction to the wrapping mannequin the place BTC is decrypted on the native chain. BOB extends the financial layer of Bitcoin by immediately tying consensus safety to EVM execution. This two-tier system additionally permits for the aggregation of liquidity within the Bitcoin and Ethereum programs. Now, builders can develop protocols that contain native BTC in DeFi lending. It may also be used for yield farming and staking functions. This mannequin additionally strengthens the usage of Bitcoin as an energetic capital base. We make no compromises within the areas of decentralization and verifiability.
Cross-chain innovation and developer utility
BOB interoperability additionally opens the next functions: Privateness dApps: BOB permits for privacy-friendly contracts which might be suitable with Bitcoin's safety ethos. This gateway gives frictionless entry to EVM, permitting builders utilizing Ethereum and different layer 2s to develop on Bitcoin with out altering their improvement stack.
Since BOB is an optimistic rollup, there’s a typical 7-day withdrawal interval for safety towards fraud. Its mannequin is double-layered and requires steady auditing to keep away from sensible contract vulnerabilities. However, BOB's immutable anchoring to the Bitcoin ledger creates a threat of consensus-level assaults. This makes it considerably lighter than common cross-chain bridges. It has traditionally been prone to abuse, leading to cumulative losses of over $2 billion as of 2020.
Positioning within the blockchain world
Interoperability may also be one of many greatest bottlenecks in blockchain by October 2025. The truth that BOB is suitable with main networks and customizes Bitcoin PoW with Ethereum. The instrument due to this fact represents an vital milestone within the crypto stack. Analysts take into account this to be a bridge protocol, however in step with the trade pattern of minimizing cross-chain liquidity by trusts quite than wrapped asset programs.
