cirBTC is now available in the Oneliq trade picker. Circle Wrapped Bitcoin can be selected on Arc Testnet and Ethereum Sepolia. It is the first BTC-backed asset in Oneliq's token list, and its addition follows directly from Oneliq's position within the Circle ecosystem: cirBTC is issued by Circle, deployed on Circle infrastructure, and designed to work within the same platform that serves USDC, EURC, and the broader Circle stack on Arc.
What is cirBTC
Circle Wrapped Bitcoin (cirBTC) is a tokenized representation of Bitcoin issued by Circle. Each token is backed 1:1 by native BTC. The underlying Bitcoin is held by a regulated Circle entity, kept separate from Circle's corporate holdings, and reserved for the exclusive benefit of cirBTC holders. Every token is redeemable for the underlying Bitcoin.
The Bitcoin network does not support smart contracts. That constraint prevents raw BTC from participating in lending protocols, AMM pools, or programmatic payment flows without an external wrapping mechanism. cirBTC resolves this by issuing an EVM-compatible token on smart contract blockchains. In Circle's terms, the token transforms idle Bitcoin into productive capital.
cirBTC follows the same issuance principles as USDC and EURC: regulated reserve custody, transparent backing, and 1:1 redeemability. Circle deployed the token on Ethereum and Arc as the first two networks, with additional chains on the published roadmap.
cirBTC on Oneliq today
cirBTC appears automatically in the Oneliq trade token picker on two networks. No manual token import is required.
| Chain | Contract Address | Decimals |
|---|---|---|
| Arc Testnet | 0xf0C4a4CE82A5746AbAAd9425360Ab04fbBA432BF | 8 |
| Ethereum Sepolia | 0x3a3fe695F684Bf9b9e43CF43C2b895Ea5e392bB3 | 8 |
One clarification on scope. cirBTC on Oneliq today is a hold-and-trade asset. CCTP V2 bridging and Circle Gateway spend flows are not yet supported for cirBTC. Both depend on Circle adding the token to their cross-chain infrastructure, which is part of the multichain roadmap Circle has published for cirBTC. The contract addresses above are the canonical testnet references for any team building on Arc or Ethereum Sepolia.
What cirBTC enables on Arc
Wrapping Bitcoin unlocks the DeFi primitives that BTC cannot access natively: lending, borrowing, and onchain trading on smart contract chains. cirBTC is the form in which that capital becomes programmable within the Circle ecosystem.
Paired with USDC, cirBTC enables holders to post it as collateral and borrow USDC, accessing capital without selling the underlying Bitcoin position. Circle identifies this as the foundational institutional use case for the token.
This integration is part of the Arc ecosystem roadmap. Oneliq will surface it as protocols ship.
The neutral issuer design
Circle does not operate a competing exchange or lending book. That distinction matters specifically for wrapped tokens.
When an exchange issues a wrapped BTC token, the issuer holds privileged mint and burn access while competing with the lending and trading protocols built around it. The structural conflict of interest is inherent to that model. So is the custody risk: a wrapped token is only as reliable as its issuer.
cirBTC is built around the same principles that govern USDC and EURC. The issuer is neutral. Reserves are segregated from corporate assets. The token is redeemable 1:1 for the underlying asset. Circle has maintained this model across USDC at significant scale, providing a meaningful baseline for what cirBTC's issuer credibility looks like in practice.
On Arc specifically, USDC is the native gas token. Every transaction on the network settles fees in USDC. BTC-denominated positions on Arc therefore carry USD-denominated transaction costs rather than ETH-denominated ones, which is an operational advantage for both protocols and institutions managing BTC exposure on the network.
What's next
Circle has published a multichain roadmap for cirBTC that mirrors the expansion model used for USDC: sequential rollout to additional networks as infrastructure and regulatory conditions permit. Oneliq already has CCTP V2 deployed across eight testnets. When Circle adds cirBTC support to those networks, the routing layer on Oneliq's side is already in place.
As lending protocols come to Arc, cirBTC is positioned as a first-class collateral asset from day one. The token is deployed on Arc Testnet and Ethereum Sepolia today, and any team can begin integration testing against the contracts immediately.
Try it
Open oneliq.xyz/trade and connect a wallet. Select Arc Testnet or Ethereum Sepolia, then open the token picker. cirBTC appears in the list automatically. For teams building protocols that plan to support the token, the contract addresses in the table above are the canonical testnet references for both networks.
Bitcoin in the Circle ecosystem.
cirBTC is live on Oneliq on Arc Testnet and Ethereum Sepolia. No import needed.
Open Trade Read the docsOneliq is a non-custodial frontend currently on Arc Testnet. cirBTC is Circle's testnet token. Nothing here is real money or financial advice. We don't custody funds; you always retain control of your wallet.