BTC.b FAQ

BTC.b represents Bitcoin across multiple blockchains with 1:1 backing. Key features include no yield, no KYC requirement, and availability on Ethereum, Avalanche, MegaETH, Monad, and Stable.

BTC.b was originally created by Ava Labs for the Avalanche ecosystem in 2022. In October 2025, Lombard acquired BTC.b’s infrastructure.

BTC.b offers straightforward Bitcoin representation without yield mechanisms, while LBTC enables earning opportunities alongside holdings.

• BTC.b: 0% minting fee, 0.0001 BTC redemption fee, no KYC
• WBTC: 0.25% fees, KYC required, merchant-dependent access

• BTC.b: Decentralized consortium model, no geographic restrictions
• cbBTC: Coinbase-centralized, account-dependent access

No direct conversion exists; redemption to native BTC followed by re-minting is required, though some DEXs may offer swaps.

1. Go to the Lombard app and select BTC.b minting
2. Connect your destination wallet and choose the destination chain
3. Lombard generates a unique deposit address tied to your destination
4. Send BTC to that address from any wallet that supports SegWit
5. Wait for 3-6 Bitcoin confirmations
6. BTC.b mints automatically to your destination address

Minimum deposit: 0.0002 BTC. No maximum limit. Minting fee is 0%.

Warning: Any UTXOs spent into the protocol are irrecoverable if containing Ordinals or inscriptions.

2-hour processing window including security verification and consortium coordination. Cannot be cancelled post-confirmation.

Lower fees result from Lombard’s decentralized model without intermediary merchants.

• 14-member consortium (OKX, Galaxy, Kraken, DCG)
• Hardware Security Modules with offline key storage
• Chainlink Proof of Reserve verification
• 10 independent audits across six firms (OpenZeppelin, Halborn, Veridise, Sherlock, ABDK, Cantina)

BTC.b mints natively from BTC on Ethereum, Avalanche, MegaETH, Monad and Stable, and can be bridged between those chains through Ethereum. BTC.b is not deployed on Solana or Sui.

Katana was deprecated on September 16, 2026. BTC.b on Katana can only be bridged to Ethereum, until December 10, 2026.

Bridge your full BTC.b balance from Katana to Ethereum before December 10, 2026. Native minting and redemption on Katana are disabled, and Ethereum is the only bridge destination. BTC.b does not bridge from Katana back to Avalanche or to any other chain.

Once on Ethereum you can hold BTC.b, deploy it into DeFi, bridge it to another supported chain, or redeem it for native BTC. Step-by-step instructions: Migrate from a Deprecated Chain.