Circle launches Bitcoin-backed cirBTC on Arc network
Circle has launched cirBTC, a Bitcoin-backed collateral token, on the Arc network; it went live on September 21, 2026.
Circle has introduced Bitcoin-backed collateral into a regulated, stablecoin-native blockchain environment without requiring BTC holders to sell any Bitcoin. Circle Wrapped Bitcoin, branded cirBTC, started on the Arc network on September 21, 2026, five days after Arc launched its mainnet.