The demonstration, conducted on mainnet, marks a pivotal advancement in blockchain interoperability. By wrapping 1 BTC into xBTC—a programmable token secured through BitcoinOS’ BitSNARK zero-knowledge proofs—the transaction circumvented custodial bridges, reducing risks and latency.

BitcoinOS states that the xBTC was transferred to Cardano and back to Bitcoin, showcasing seamless cross-chain functionality. BitcoinOS collaborated with Sundial Protocol, a hybrid Bitcoin-Cardano layer two (L2) solution, and Handle, Cardano’s identity platform, to execute the transfer.

Source: BitcoinOS

The process essentially involved wrapping BTC into xBTC on Bitcoin, bridgelessly moving it to Sundial’s Cardano wallet, transferring it to Handle’s wallet, and returning it to Bitcoin before unwrapping it back to native BTC. Edan Yago, a core BitcoinOS contributor, said the demo proves Bitcoin can gain smart contract capabilities while remaining trustlessly anchored to its blockchain.

The demonstration’s abilities turns “Cardano into a seamless DeFi layer for Bitcoin,” he added, highlighting implications for other UTXO-based chains. Sheldon Hunt, founder of Sundial Protocol, said the achievement was a turning point for decentralized interoperability. “It’s a turning point for the entire blockchain ecosystem,” he said. Jonah Peralta of Handle emphasized the breakthrough’s significance for Bitcoin’s utility, stating it unlocks smart contracts and scalability while maintaining Bitcoin’s security.

The innovation allows BTC to participate in decentralized finance (DeFi) across ecosystems without bridges, addressing long-standing challenges of custodial risk and fragmented liquidity. BitcoinOS’ use of zero-knowledge proofs embeds programmable logic directly into Bitcoin transactions, enabling L2 solutions with full Bitcoin security.

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