Here are keyhiglights from the news:
- Circle has unveiled the Arc public testnet, a new layer-1 blockchain aimed at becoming an “Economic OS” for digital finance.
- Arc uses USD Coin as its native gas token and supports smart contracts, cross-chain transfers, and tokenized assets, integrating with Circle’s broader financial infrastructure.
- Major players like Visa, HSBC, and BlackRock have joined the testnet, alongside crypto platforms and financial institutions.
- The testnet enables developers to build and test real-world financial applications, with a full mainnet launch planned for 2026 and a future shift toward decentralized governance.
Circle, the company behind the popular stablecoin USDC, has officially unveiled the Arc blockchain public testnet, marking a significant step in its mission to power the next generation of real-world economic activity on chain.
The announcement comes two months after Circle introduced Arc as a layer-1 blockchain network designed to serve as the “Economic OS for the Internet.” The platform aims to bridge stablecoins, tokenized assets, and traditional finance through scalable and secure blockchain infrastructure.
Arc Blockchain Public Testnet Opens for Global Access
The Arc blockchain public testnet went live on October 28, 2025, allowing developers and enterprises to test smart contracts, conduct cross-chain transfers, and launch tokens in a sandboxed environment.
Circle confirmed that Arc uses USDC as its native gas token, integrating deeply with the company’s ecosystem of products such as the Circle Payments Network, CCTP (Cross-Chain Transfer Protocol), and Gateway for interoperability.
“Arc is designed to be far more than just a blockchain for USDC. It’s built to become home to all forms of digital money and tokenized value,” said Nikhil Chandhok, Chief Product & Technology Officer at Circle.
Developers Can Test Real-World Financial Applications
The Arc blockchain public testnet offers full-stack access for developers to experiment with decentralized finance (DeFi) applications, payment solutions, and digital asset management. Participants can deploy smart contracts, validate wallet operations, and test swaps and cross-asset interactions.
This open access phase will help Circle fine-tune network performance and strengthen integration before the mainnet launch planned for 2026. Circle will initially oversee Arc’s development but aims to transition to decentralized governance as the ecosystem matures.
Major Institutions Join the Arc Testnet
In a show of confidence, several major global firms have joined the Arc blockchain public testnet ecosystem. These include Visa, HSBC, and BlackRock — representing payments, banking, and asset management sectors respectively.
Visa’s participation will help enhance cross-border transaction capabilities, while HSBC brings expertise in connecting traditional finance with blockchain infrastructure. BlackRock, meanwhile, is exploring the use of Arc for tokenized funds and digital investment strategies.
Other ecosystem collaborators include decentralized platforms like Uniswap, developer tools providers such as Alchemy and Chainlink, and wallet partners like MetaMask and Ledger. Financial heavyweights including Deutsche Bank, Goldman Sachs, NYSE, and State Street are also testing integrations.
Looking Ahead to Mainnet Launch in 2026
The Arc blockchain public testnet marks a critical milestone for Circle as it positions itself beyond stablecoin issuance and toward full-stack blockchain infrastructure. With active collaboration from global institutions and developers, Arc is set to become a key player in connecting traditional finance with the decentralized economy.
As testing continues, the crypto and fintech industries are watching closely — and 2026 could see the launch of one of the most ambitious blockchain projects led by a regulated financial technology company.
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