cirBTC supports money flows between USDC and bitcoin (BTC) by connecting BTC collateral with stablecoin liquidity for borrowing, treasury, settlement, and more.
cirBTC is designed to connect USDC and bitcoin (BTC) with multichain stablecoin liquidity, helping institutions leverage BTC collateral to access borrowing, treasury operations, hedging, and onchain settlement without fully unwinding BTC positions.
Bitcoin (BTC) has always excelled at one thing: being bitcoin. For institutions, that core strength can also create operational constraints and limitations. Native BTC can sit in custody, anchor a balance sheet, or support long-term treasury strategies. But BTC cannot function natively in smart contract environments where collateral, credit, and settlement workflows operate.
That is why wrapped BTC was created: to make BTC usable in onchain markets by pairing native BTC held in custody with a 1:1 backed token that can participate in those environments. The market demand for tokenized BTC has been proven, but institutional adoption requires clear reserve design, disciplined custody, transparent verification, reliable redemption mechanics, and an issuer whose incentives support broad distribution.
Circle Wrapped Bitcoin (cirBTC) is now available on Ethereum, with Arc support coming soon. Designed as a Circle-native wrapped BTC token for institutional markets, cirBTC is intended to connect BTC collateral with USDC liquidity across borrowing, treasury operations, hedging, onchain settlement, and more.
Tokenized BTC still has a bitcoin capital efficiency problem
For market makers, OTC desks, lending protocols, trading firms, and digital asset managers, wrapped BTC is core operating infrastructure — it determines how the underlying BTC is held, how minting and redemption work, and which counterparties can use the asset with confidence. Public market data shows tokenized BTC is already a multi-billion-dollar category, with liquidity concentrated across a small number of products.
While scale is important, it alone does not solve for institutional risk. When reserve visibility is delayed, redemption paths are unclear, governance structures are complex, or the issuer also competes for trading flow, institutions price in that friction. Lending parameters become more conservative. Treasury teams hold back. Market makers split inventory across BTC wrappers. BTC collateral remains less productive than it otherwise could be.
Addressing that friction requires a clearer definition of capital efficiency itself: bitcoin capital efficiency means using BTC exposure with greater precision — to finance inventory, settle large trades, post collateral, fund hedges, and access liquidity without selling bitcoin holdings.
Circle Wrapped Bitcoin brings disciplined BTC collateral
Circle Wrapped Bitcoin, with cirBTC as the official token name and symbol, is a BTC product designed for institutions that need a security-focused and strategically neutral option for wrapped BTC. Every cirBTC is 1:1 backed by native BTC.
The underlying BTC is held through Circle’s Bermuda affiliate and custodied by Circle National Trust, a federally chartered national trust bank and qualified custodian under the supervision and examination of the OCC, for the exclusive benefit of cirBTC holders. cirBTC is designed as an institutionally-friendly 1:1 wrapped token, not a staked or derivative version of wrapped BTC.
Reserve transparency is central to cirBTC’s design. Circle uses Chainlink Proof of Reserve to provide onchain reserve data, alongside multi-address transparency that allows counterparties to independently verify BTC collateral metrics on the Bitcoin blockchain.
Institutional risk teams need BTC collateral they can monitor. Lending protocols need onchain reserves they can evaluate. OTC desks and market makers need confidence that minting, redemption, and collateral verification can support real trading workflows, including during volatile market cycles.
How USDC and bitcoin create an onchain credit loop
The natural complementary asset for cirBTC is USDC. In institutional credit workflows, BTC collateral backs cirBTC while USDC serves as a dollar-denominated liquidity leg.
When combined, USDC and bitcoin can form an efficient onchain credit loop. A trading firm can use cirBTC collateral in supported third-party lending markets and borrow USDC to fund trading operations. An OTC desk can help clients access tokenized BTC liquidity and settle directly onchain. A digital asset manager can manage stablecoin balances against BTC-backed collateral. A market maker can support cirBTC trading pairs while managing inventory across venues.
USDC is institutional-grade digital dollar infrastructure, with Q1 2026 circulating volumes exceeding $75 billion with over $20 trillion in cumulative transaction volume. These numbers demonstrate the operational depth of USDC to support high-velocity minting, redemption, settlement, and liquidity movement at scale.
Borrow against bitcoin without unwinding BTC positions
For many BTC holders, selling is a blunt instrument that can reduce potential upside exposure, disrupt strategic treasury operations, create accounting complexity, or trigger taxable events. The ability to borrow against bitcoin provides novel ways to put BTC reserves to work and unlock capital efficiency at scale.
cirBTC is designed to make BTC-backed collateral usable in supported onchain environments while the underlying BTC remains in a transparent reserve structure. Where supported by third-party protocols, institutions may be able to use cirBTC collateral to borrow USDC for operational expenses, margin needs, hedging, inventory financing, settlement, and more.
cirBTC is not a yield-bearing token. The value is in market access: the ability to participate in credit markets while USDC suppliers and borrowers meet in onchain markets that set their own terms, rates, and risk profiles. cirBTC supports a clearer path to productive bitcoin deployment where BTC can remain part of a long-term corporate strategy while also supporting near-term liquidity needs.
Built for treasury, liquidity access, and onchain settlement
Capital efficiency supports faster settlement, cleaner inventory movement, better collateral mobility, and more predictable liquidity access — especially when digital asset markets move quickly. Now available on Ethereum with Arc support forthcoming, cirBTC is designed to support a growing multichain architecture so institutions can move value seamlessly across the chains that power capital-efficient workflows. Ethereum provides access to well-established DeFi liquidity and existing institutional workflows. Planned Arc support will give cirBTC a natural role inside Circle’s full-stack platform, where USDC, Circle Mint, and onchain settlement infrastructure synergistically work together.
Circle's strategic neutrality has a precise meaning: Circle does not operate a competing centralized exchange (CEX), decentralized exchange (DEX), or lending protocol. Circle’s incentive is for cirBTC to work across venues, chains, and protocols, not to compete for institutional order flow or users.
These aligned market structure incentives matter when selecting a wrapped BTC product. Lending protocols need collateral that can be adopted without venue conflict. OTC desks need assets clients can accept across workflows. Market makers need inventory that can move where liquidity develops. Digital asset managers need infrastructure that passes risk review processes.
Circle’s full-stack advantage
Operational risk is cumulative. Every additional issuer, venue, custodian, bridge, and redemption path creates another underwriting layer. The broader opportunity with cirBTC is not merely using it in isolation, but deploying it inside a Circle-native stack where stablecoin liquidity meets BTC collateral through infrastructure built for institutional use. Circle Mint provides workflows for minting and redemption. Core layers such as custody and conversion are designed to operate through Circle’s stack to reduce cross-issuer complexity.
A Circle-native relationship between cirBTC and USDC can make workflows easier to evaluate, integrate, and scale. Circle’s objective is to bring BTC collateral into onchain finance with the transparency, redemption design, and liquidity institutions require.
A more capital-efficient bitcoin market
Institutional confidence in wrapped BTC will not be defined by market cap but by the collateral assets that earn that confidence and move through the markets where capital is already working. cirBTC is designed to connect bitcoin’s role as long-term collateral with USDC’s role as programmable stablecoin liquidity. For institutions, that powerful combination can support borrowing, treasury management, hedging, liquidity access, and onchain settlement without fully unwinding BTC exposure.
Now available on Ethereum, with cirBTC on Arc support coming soon, subject to applicable regulatory approvals. Learn more.
cirBTC is issued by Circle International Bermuda Limited, a Class F Digital Asset Business licensed and regulated by the Bermuda Monetary Authority. Circle Mint and related distribution services are provided by Circle Internet Financial, LLC, NMLS # 1201441.
Arc testnet is offered by Circle Technology Services, LLC (“CTS”). CTS is a software provider and does not provide regulated financial or advisory services. You are solely responsible for services you provide to users, including obtaining any necessary licenses or approvals and otherwise complying with applicable laws.
Arc has not been reviewed or approved by the New York State Department of Financial Services.
The product features described in these materials are for informational purposes only. All product features may be modified, delayed, or cancelled without prior notice, at any time and at the sole discretion of Circle Technology Services, LLC. Nothing herein constitutes a commitment, warranty, guarantee or investment advice.
Nothing herein constitutes tax advice; you should consult your own tax advisors regarding the treatment of digital asset transactions.
USDC is issued by regulated affiliates of Circle. See Circle’s list of regulatory authorizations.
Circle Mint and money transmission services are provided by Circle Internet Financial, LLC. Circle Internet Financial, LLC, NMLS # 1201441, is a licensed provider of money transmission services. See Circle’s licenses here. Circle Mint is currently available only to institutions and is not available to individuals.
