Gateway gives cirBTC holders a shared balance, with advertised fast access after deposit finality and a separate seven-day fallback exit.
Circle added its Bitcoin-backed token, cirBTC, to Gateway on Oct. 23, letting holders use one deposited balance across the Ethereum and Arc blockchains. Gateway treats deposits across supported networks as a single spendable balance per asset, reducing the need to keep funds ready on both chains, according to Circle’s announcement.
The expansion also adds the EURC stablecoin alongside USDC. Circle’s asset-specific documentation lists cirBTC on Ethereum and Arc mainnet. EURC is supported on those networks plus Avalanche, Base, Solana and World Chain.
Gateway keeps a separate balance for each asset. A cirBTC transfer burns the token on the source network and mints cirBTC on the destination; it neither converts the balance into USDC nor transfers native Bitcoin. For an exchange or wallet serving both chains, Circle says the shared inventory can be deployed where a withdrawal or payment needs to land.
Circle advertises cross-chain access in under 500 milliseconds once the deposit has finalized and the balance is established. That estimate excludes the initial funding wait and is not guaranteed. Its confirmation table lists an average of roughly 13 to 19 minutes for an Ethereum deposit before Gateway updates the balance or issues an attestation.
A separate seven-day withdrawal option lets holders reclaim funds directly from the Gateway Wallet contract without relying on Circle’s API. Circle’s asset documentation explicitly extends that withdrawal delay to cirBTC. It is a fallback exit, rather than the ordinary transfer time between Ethereum and Arc.
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