Jinse Finance reported that Circle announced on Tuesday the deployment of the public testnet for its payment-oriented Arc blockchain, which has attracted participation from over 100 financial institutions and technology companies, including BlackRock, Visa, HSBC, and Anthropic. The Arc blockchain offers USD-denominated fees, sub-second settlement, and optional privacy controls, aiming to support financial services such as tokenized funds, cross-border payments, and foreign exchange settlements.