Chainstack introduces support for B²

We’re excited to announce that Chainstack now supports the B² Network, a zero-knowledge rollup Layer 2 built on Bitcoin—bringing zk verification commitments, Ethereum compatibility, and novel challenge mechanisms to the world’s most secure blockchain.

With this integration, developers can now explore the frontier of Bitcoin-based rollups using Chainstack’s scalable, test-friendly infrastructure.

Why build on B²?

B² is a practical Bitcoin Layer 2 network, purpose-built to bring smart contract programmability and rollup efficiency to Bitcoin. Key features include:

• ZK verification commitments on Bitcoin: A novel commitment system using Taproot, enabling fraud-proof–driven challenge mechanisms.
• EVM compatibility: Deploy Ethereum-style smart contracts and dApps using both Bitcoin and Ethereum address formats.
• Low cost, fast, and trust-minimized: Rollup efficiency meets Bitcoin-level security for scalable DeFi and infrastructure.

B² is the first zk-powered Bitcoin rollup to introduce a full challenge-based trust system, combining the best of Ethereum’s L2 architecture with Bitcoin-native design.

Build better with B² on Chainstack

Running B² nodes is now zk-native and protocol-flexible with Chainstack. Whether you’re verifying rollup proofs, running fraud challenge simulations, or testing Bitcoin-compatible smart contracts, Chainstack offers:

• Dedicated B² RPC infrastructure for zero-knowledge rollup experimentation
• Transparent flat-rate pricing—ideal for test-heavy cycles and low-overhead builds
• Cloud-deployable anywhere with deep regional support for performance tuning

Get started: Build better with B²

How to get started with B² on Chainstack

1. Spin up a node: Request your a B² node using the Chainstack console or contact our Sales team.
2. Connect with tools: Use standard EVM SDKs or B²-specific commitment and challenge frameworks.
3. Build and deploy: From zk circuits to fraud-proof simulations—Chainstack powers Bitcoin-native innovation.

See our pricing plans

Bringing it all together

With support for B², Chainstack is enabling a new wave of developers to bring Ethereum-style execution to Bitcoin while pioneering next-gen zk verification.

If you’re building at the edge of Bitcoin Layer 2 innovation, Chainstack B² infrastructure is here to support you every step of the way.

Start building with B² today

Power-boost your project on Chainstack

• Discover how you can save thousands in infra costs every month with our unbeatable pricing on the most complete Web3 development platform.
• Input your workload and see how affordable Chainstack is compared to other RPC providers.
• Connect to Ethereum, Solana, BNB Smart Chain, Polygon, Arbitrum, Base, Optimism, Avalanche, TON, Ronin, zkSync Era, Starknet, Scroll, Aptos, Fantom, Cronos, Gnosis Chain, Klaytn, Moonbeam, Celo, Aurora, Oasis Sapphire, Polygon zkEVM, Bitcoin and Harmony mainnet or testnets through an interface designed to help you get the job done.
• To learn more about Chainstack, visit our Developer Portal or join our Discord server and Telegram group. 
• Are you in need of testnet tokens? Request some from our faucets. Multi-chain faucet, Sepolia faucet, Holesky faucet, BNB faucet, zkSync faucet, Scroll faucet.

Have you already explored what you can achieve with Chainstack? Get started for free today.