B² Network (BSquared)
Bitcoin L2 with EVM compatibility, ZK proof rollup combined with optimistic challenge mechanism. Deployed 2024, growing 2025-2026.
Architecture
- EVM execution (Solidity contracts).
- ZK proofs for state validity.
- Optimistic challenges as backup verification.
- Bridge: federation + planned BitVM upgrade.
- Native token: B²BTC (peg-style) + B² (governance/utility).
Use cases
- DeFi: yield protocols, lending, AMMs.
- Bitcoin staking-like products: bridged BTC earns yield in B² ecosystem.
- NFTs / Asset issuance.
Position
One of multiple "Bitcoin L2" projects competing for TVL in 2024-2025. Notable but smaller than Stacks, RSK, Merlin in TVL terms (early 2026).
Limitations
- Federation trust for current bridge.
- EVM compatibility but smaller dApp ecosystem.
- Unclear path to fully trustless bridging.