B² Network: Hybrid ZK + Optimistic Bitcoin L2

B² Network is a hybrid Bitcoin L2 combining ZK proofs and optimistic challenges, with EVM compatibility. Launched in 2024, it supports DeFi, Bitcoin staking, and NFTs.

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007/23/2026
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#bitcoin-l2#evm-compatible#hybrid-rollup#defi

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name: bitcoin-l2-bsquared description: | B² Network (BSquared): hybrid ZK + optimistic Bitcoin L2 with EVM compatibility. Live since 2024. USE WHEN: evaluating B² for deployment, integrating with their bridge, comparing Bitcoin L2 options. allowed-tools: Read, Grep, Glob

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.

See also

Related skills