It appears that Circle's native blockchain Arc has been launched, but public testing has not been announced yet.

BlockBeats News, July 13th, According to crypto KOL @amathxbt and others, Circle's affiliated public chain Arc may have been privately launched. Cross-chain protocols LayerZero and LI.FI have been deployed to the Arc network, but have not been publicly tested by the community.

According to public information, Arc is a public Layer 1 blockchain, positioned as the "Economic Operating System of the Internet," providing a shared, composable infrastructure to support economic contracts, stablecoins, tokenized assets, and global market operations.

In May of this year, Circle officially released the ARC Whitepaper, outlining ARC as the design framework for the native coordinated assets of the Arc blockchain network. The Arc public testnet was launched in October 2025, with the mainnet expected to go live in the summer of 2026.