Circle Launches Bitcoin-Backed USDC Borrowing for Institutions
Circle Launches Bitcoin-Backed USDC Borrowing for Institutions
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Key Points
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cirBTC is backed 1:1 by Bitcoin held in custody by Circle National Trust, and Circle uses Chainlink proof-of-reserves verification to provide on-chain confirmation of the underlying collateral.
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After an institution repays its USDC loan, the collateral is released, allowing the borrower to redeem cirBTC and ultimately recover the underlying Bitcoin; the process is designed to avoid separately coordinating custody, bridging and DeFi transactions.
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Circle’s Arc infrastructure supports additional tokenized assets, including BlackRock’s BUIDL and Circle’s USYC, while using USDC as its native gas token—positioning the blockchain for more than Bitcoin-backed borrowing alone.
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The launch reflects a wider institutional-credit trend: Anchorage Digital partnered with Kamino to enable borrowing against staked Solana held at Anchorage Digital Bank, while Lombard and Bitwise developed a separate model for borrowing against custodied Bitcoin with Morpho providing the lending infrastructure.
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According to Crypto Briefing, Morpho vaults backed by cirBTC attracted more than $150 million in combined USDC and EURC deposits on Arc’s launch day, indicating early liquidity demand for the new collateral model.
Circle has launched a new service that lets institutional customers borrow USDC stablecoins using their Bitcoin as collateral—without having to sell it. Crypto Economy reports that the Digital Asset-Backed Borrowing service converts Bitcoin into cirBTC tokens backed 1:1 by actual Bitcoin held by Circle National Trust. Customers can then use these tokens to access loans through lending protocols like Morpho, receiving USDC directly into their Circle Mint accounts.
The move reflects a broader push by crypto firms to unlock institutional liquidity while keeping custody arrangements intact. The Defiant notes that Morpho vaults backed by cirBTC attracted over $150 million in combined USDC and EURC deposits on Arc's launch day, signaling strong early demand for the new collateral model.
How Bitcoin Becomes Borrowing Power
When an institution deposits Bitcoin, Circle wraps it into cirBTC tokens—each one backed by real Bitcoin held in custody. News.Bitcoin explains that customers then supply these cirBTC tokens through their own wallet to third-party lending markets on Circle's Arc blockchain or Ethereum. The borrowed USDC automatically appears in the customer's Circle Mint balance. Interest rates and collateral requirements are set by the lending protocol, not Circle.
Once a customer repays the USDC loan, their collateral unlocks automatically. They can then redeem cirBTC for their original Bitcoin. Grafa highlights that this design avoids the typical friction of coordinating custody, bridging, and DeFi transactions separately—keeping everything streamlined within Circle's infrastructure.
Morpho Leads Early Adoption, Rivals Close Behind
Morpho is the initial lending protocol supporting cirBTC borrowing, but Circle plans to add Aave and other platforms. The Defiant reports that the cirBTC market on Arc holds $14.3 million of borrowed USDC backed by 287 cirBTC tokens, with major crypto firms Galaxy and Keyrock supplying most of the lending capital. The figure represents a sharp jump from just $1.37 million on September 17.
Circle is not alone in this space. Crypto Briefing notes that Anchorage Digital partnered with Kamino to let customers borrow against staked Solana held at Anchorage Digital Bank, while Lombard and Bitwise built a separate model for Bitcoin-backed borrowing using Morpho. The trend shows institutional crypto firms racing to offer collateral-based lending without forcing clients to sell their holdings.
Arc Expands Beyond Bitcoin to Tokenized Assets
Circle's Arc blockchain is emerging as a hub for institutional tokenized assets. Coinfomania reports that Arc now supports BlackRock's BUIDL fund token, Circle's USYC stablecoin, and USDC as its native gas token. This multi-asset approach positions Arc as more than just a Bitcoin-borrowing platform—it's becoming infrastructure for a broader institutional DeFi ecosystem.
The service is available to eligible institutional Circle Mint customers but excludes New York-based clients due to regulatory constraints. Crypto Economy emphasizes that all positions are overcollateralized—meaning borrowers must put up more collateral than the value of their USDC loan—to protect lenders from price swings.
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