Sundial Protocol and ADA Handle Successfully Demonstrate the First-Ever Bridgeless Bitcoin (BTC) Transfer Between Bitcoin and Cardano Mainnets

In a groundbreaking development for blockchain interoperability, the first-ever bridgeless transfer of Bitcoin (BTC) between the Bitcoin and Cardano mainnets was successfully demonstrated on May 4, 2025.

This milestone was achieved through a collaboration between Sundial Protocol and ADA Handle, utilizing an innovative unchained token standard. Blockchain researcher Mintern highlighted this milestone on X, showcasing a breakthrough in DeFi.

"The first-ever bridgeless transfer of $BTC between the Bitcoin and Cardano mainnets was successfully demoed on May 4, 2025. Preformed by @SundialProtocol and @adahandle, using an unchained token standard from BitcoinOS and a xBTC token on BTC.

This new innovation allows for cross-chain liquidity to flow freely and easily, with no need for any complicated bridge technologies or third-party custodians. Instead, the transfer was completed using a simple and efficient process that leverages the unique capabilities of both blockchains.

Sundial Protocol is a pioneering Layer-2 solution on Cardano, designed to bring Bitcoin’s deep liquidity to Cardano’s smart contract ecosystem.

ADA Handle is a service that provides user-friendly, human-readable addresses on the Cardano blockchain, making it easy for people to interact with the ecosystem.

This groundbreaking achievement is a testament to the ingenuity and collaboration of the blockchain community. As we continue to push the boundaries of what’s possible, we can look forward to even more incredible milestones in the future of Web3."

Traditional cross-chain transfers often involve bridges that come with inherent custodial risks and potential vulnerabilities. However, this demonstration went a step further by integrating BitcoinOS’s xBTC token and zero-knowledge proofs to facilitate a seamless and secure BTC transfer to the Cardano blockchain and subsequent return to Bitcoin.

Sundial Protocol is a pioneering Layer-2 solution on Cardano, specifically designed to integrate Bitcoin’s substantial liquidity into Cardano’s smart contract ecosystem.

Sundial Protocol is a Layer-2 scaling solution for the Cardano blockchain. It aims to bring Bitcoin’s liquidity to Cardano’s DeFi ecosystem. Its goal is to enable trustless and efficient BTC transfers on Cardano, unlocking new possibilities for DeFi and decentralized applications on the Cardano network, which is known for its scalability and low transaction costs.

ADA Handle is focused on simplifying interactions within the Cardano blockchain ecosystem by providing user-friendly, human-readable addresses. This service contributes to making blockchain technology more accessible to a broader audience.

The successful bridgeless BTC transfer between Bitcoin and Cardano marks a significant step in the advancement of cross-chain DeFi. It paves the way for similar integrations with other major blockchains, such as Ethereum and Solana, in the future.

This integration will unlock new opportunities for DeFi on Cardano, and its goal is to bring Bitcoin’s liquidity to the Cardano ecosystem. Sundial Protocol is developing an unchained token standard with xBTC for cross-chain interoperability, enabling seamless BTC transfers between Bitcoin and Cardano.

This collaboration will focus on facilitating trustless and efficient BTC transfers, leveraging Sundial Protocol’s strengths in Layer-2 scaling on Cardano and ADA Handle’s expertise in creating a more user-friendly experience on Cardano. Together, they aim to build an innovative solution for rapid and secure cross-chain liquidity.

The role of blockchain researchers in this domain is critical. Mintern, a recognized figure in the field, has been closely following and reporting on key developments in DeFi. Their contribution on X (formerly Twitter) is a valuable resource for staying informed about the latest advancements and analysis within the decentralized finance domain.

As the blockchain industry continues to evolve at a rapid pace, collaborations like the one between Sundial Protocol, ADA Handle, and BitcoinOS will be instrumental in pushing the boundaries of technological innovation and realizing the full potential of decentralized finance.