cirBTC Live on Arc, Ethereum, and Tower with Proof of Reserve

cirBTC, Circle's 1:1 BTC-backed wrapped Bitcoin token, is live on Arc, bringing BTC liquidity into Circle's Economic OS for lending, trading, collateral, settlement, and treasury workflows. It went live on Ethereum for all Circle Mint LLC customers ahead of that, with underlying BTC segregated at Circle National Trust, a federally chartered national trust bank and qualified custodian supervised by the OCC.

cirBTC is now also tradable on Tower Exchange, the stablecoin-focused DEX aggregator in the Arc ecosystem, expanding where the token can be traded onchain.

Circle has added Digital Asset-Backed Borrowing in Circle Mint for eligible Circle Mint LLC customers: deposit BTC, mint cirBTC, and borrow USDC, using BTC-backed cirBTC as collateral through supported third-party lending markets on Arc. That borrowing capability is powered by Morpho.

• Designed for tokenized BTC transparency: segregated custody, disclosed reserve addresses, Chainlink Proof of Reserve, and onchain reserve data.
• Morpho powers the Arc lending leg of the borrowing workflow.