Key Highlights
- Circle deployed cirBTC on Ethereum mainnet June 8, 2026, aiming to capture market share from WBTC’s $9 billion wrapped Bitcoin dominance.
- Each cirBTC token represents one Bitcoin stored in regulated, segregated custody accounts designed for institutional participants.
- Chainlink Proof of Reserve
- provides continuous on-chain validation of cirBTC Bitcoin holdings, eliminating dependency on periodic third-party attestations.
- WBTC commands approximately 85% of the wrapped Bitcoin sector with around 119,000 tokens currently circulating.
- Coinbase’s cbBTC has grown to approximately $5.9 billion in market capitalization following its September 2024 debut.
Circle has unveiled cirBTC, an ERC-20 token representing Bitcoin on a 1:1 basis, operational on Ethereum mainnet as of June 8, 2026. This offering addresses institutional participants requiring Bitcoin collateral within Ethereum-based smart contract environments. The launch positions cirBTC as a competitor to WBTC’s approximate $9 billion valuation and commanding 85% market position, featuring continuous reserve validation capabilities.
cirBTC Launches With Institutional Focus and Transparent Reserve System
Circle developed cirBTC specifically for institutional clients, encompassing OTC trading desks, market makers, lending platforms, and DeFi protocol operators. The token operates on Ethereum as an ERC-20 standard asset with full native Bitcoin backing held under regulated custody arrangements. Circle Mint handles both issuance and redemption processes via its institutional liquidity infrastructure.
Chainlink Proof of Reserve enables continuous backing verification through transparent Bitcoin wallet addresses. Market participants can validate reserves directly on-chain, removing the need to wait for scheduled attestation reports. Circle emphasized that “every cirBTC token maintains complete backing through segregated Bitcoin holdings.”
Circle maintains Bitcoin reserves independently from corporate treasury assets. Institutions can retain native BTC under custody while cirBTC tokens move freely across Ethereum applications. This infrastructure leverages identical settlement mechanisms that power USDC transaction processing.
WBTC Holds Commanding Position While cirBTC Pursues Institutional Adoption
BitGo launched Wrapped Bitcoin in January 2019 and continues operating as exclusive custodian. WBTC maintains approximately 119,000 tokens in circulation, representing roughly $8–9 billion in aggregate value. The product commands nearly 85% of the wrapped Bitcoin market segment.
Coinbase released cbBTC in September 2024 as an institutional-grade alternative. This token has achieved approximately $5.9 billion in total market valuation. Additional exchange-backed offerings from Kraken, Binance, Bitget, and OKX collectively account for remaining market presence.
Circle presents cirBTC as an independent issuer operating without exchange-related activities. The organization does not maintain a centralized exchange, decentralized exchange, or proprietary lending operation. Circle noted that “neutral infrastructure eliminates potential information conflicts for institutional participants.”
Aggregate tokenized Bitcoin supply across various wrapper products stands between $15 billion and $20 billion during Q2 2026. This volume represents below 2% of Bitcoin’s $1.7 trillion overall market capitalization. Institutional appetite for regulated on-chain Bitcoin representations has expanded since 2024.
Circle enters this competitive landscape leveraging its USDC distribution infrastructure and established institutional connections. The firm applies its proven custody and token issuance framework to Bitcoin-backed collateral products. The cirBTC token remains operational on Ethereum mainnet following its June 8, 2026 activation.
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