cirBTC Is Now Live on Ethereum for Wrapped BTC Deployment

Circle has launched cirBTC on Ethereum, introducing a wrapped bitcoin token designed to let institutions use BTC as collateral across onchain markets without moving native bitcoin out of secure custody. The launch is aimed at firms active in lending, OTC trading, market making, treasury management and settlement, where access to liquid collateral and efficient execution are increasingly important.

cirBTC is a 1:1 wrapped bitcoin asset backed by native BTC held with a regulated Circle entity and segregated from Circle’s corporate assets. The structure is intended to give institutional users a way to put bitcoin to work in smart contract-based markets while the underlying BTC remains safeguarded. In practice, this means holders can retain exposure to bitcoin while using cirBTC in supported third-party protocols where wrapped BTC is accepted.

The token’s arrival on Ethereum is significant because Ethereum remains one of the deepest and most active onchain financial environments. Lending markets, decentralized exchanges, tokenized asset platforms and stablecoin flows already operate at scale there, making it a natural venue for institutional crypto activity. By issuing cirBTC on Ethereum, Circle is positioning the asset for immediate use in existing DeFi and capital markets workflows.

Circle says cirBTC is built around security and neutrality. The company emphasizes that it does not run a competing centralized exchange, decentralized exchange or lending protocol, which it presents as an advantage for institutions that want a wrapper without issuer-driven market steering. For market makers, OTC desks, lending platforms and asset managers, the appeal lies in having a bitcoin-backed token with clear redemption, custody and reserve structures.

Reserve transparency is another core feature. cirBTC is designed to provide ongoing visibility through Chainlink Proof of Reserve, along with multi-address transparency that allows counterparties to review holdings directly on the Bitcoin blockchain. That monitoring model is intended to support always-on risk management in markets that never close.

The new token also fits into Circle’s broader product stack. Circle Mint provides the institutional minting and redemption workflow, while USDC can be used alongside cirBTC in supported DeFi markets as a dollar-backed settlement asset. Circle describes this as a cleaner path from custody to tokenization to settlement, combining bitcoin collateral and dollar liquidity within one operational framework.

Although Ethereum is the starting point, Circle says cirBTC is designed for a multichain future and for eventual integration with Arc, Circle’s own infrastructure for stablecoin finance. The company frames Ethereum as the immediate launch venue because of its existing liquidity and institutional adoption, while Arc represents a longer-term expansion path.

Circle positions cirBTC as a disciplined institutional standard for wrapped bitcoin: fully backed, segregated, verifiable and neutral. The launch reflects a broader push to make bitcoin more usable in onchain credit and capital markets without forcing holders to sell their BTC.