Circle launches cirBTC on Ethereum for institutional DeFi

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Circle launches cirBTC

Highlights

Circle launched cirBTC, a 1:1 BTC-backed token, on Ethereum.
The product lets institutions use wrapped BTC in supported DeFi markets.
BTC reserves are held by a regulated Circle entity and segregated from corporate assets.

cirBTC is a 1:1 Bitcoin-backed token that can be used in Ethereum-based DeFi markets, including lending, liquidity, and settlement workflows. According to information published on the company’s official website, the underlying BTC is held by a regulated Circle entity and kept separate from Circle’s corporate assets, while the token itself is designed to be used as collateral in smart contract markets.

Why Ethereum is the first stop

Bitcoin remains one of the most important collateral assets in crypto, but native BTC does not work directly with Ethereum smart contracts. Wrapped bitcoin products solve that problem by creating a tokenized version of BTC that can circulate on Ethereum and other programmable networks.

A trading desk, market maker, or asset manager can keep exposure to Bitcoin while using a wrapped version as collateral in supported protocols. Circle is starting with Ethereum because much of the institutional onchain market already sits there, from decentralized exchanges and lending protocols to stablecoin flows and tokenized assets.

The product also fits into Circle’s existing infrastructure. Circle Mint will handle institutional minting and redemption, while USDC can be used alongside cirBTC in supported third-party DeFi markets. Circle says cirBTC is also planned for Arc and a broader multichain rollout over time.

Reserve checks and market neutrality

Circle says cirBTC will provide ongoing reserve visibility through Chainlink Proof of Reserve. The model is designed to let counterparties review holdings directly on the Bitcoin blockchain, rather than relying only on periodic statements.

Circle is also leaning on a neutrality argument. The company does not operate a competing centralized exchange, decentralized exchange, or lending protocol, which may make cirBTC easier for institutions to use across their own venues and client relationships. That distinction matters as wrapped BTC becomes more important for lending desks, OTC trading, market making, and treasury operations.

A new contest in bitcoin collateral

The launch of cirBTC also reflects a broader shift in crypto markets. Bitcoin is no longer only a buy-and-hold asset for treasuries and funds. More institutions want to use BTC as collateral, settlement fuel, and balance-sheet infrastructure.

If cirBTC gains adoption, it could help move more Bitcoin-linked liquidity into Ethereum-based credit and capital markets.

We also reported Circle launches USDC and CCTP on the Injective blockchain.

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