Circle Arc Public Mainnet Launches Sept 16

Wall Street's biggest names will secure a blockchain starting tomorrow. Circle's Arc network opens its public mainnet on Sept. 16, with BlackRock, DTCC, Visa, Mastercard, and seven more financial institutions as founding validators. A Sept. 15 report carried by Gate confirms the schedule.

Arc is a Layer 1 built for money movement. Payments, foreign exchange, capital markets, tokenized assets, and connected financial applications are the stated targets. Fees are paid in USDC, so users never touch a separate gas token, according to a Bitget Wallet guide published Sept. 14. The chain is EVM-compatible with finality targeted under one second.

Arc aims at specific money flows. Bitget's guide lists payments and cross-border transfers, onchain foreign exchange between stablecoins, trading and settlement, collateral, tokenized assets, treasury movement, and applications where AI agents use programmable financial infrastructure. The chain connects with Circle's wider stack, including USDC and the Cross-Chain Transfer Protocol for moving USDC across supported networks. Once public, developers can build trading, lending, borrowing, and liquidity applications alongside the payments and tokenization products.

The validator list reads like a finance conference badge wall. Circle's Aug. 5 announcement names BlackRock, DTCC, Galaxy, Global Payments, ICE, Mastercard, MoneyGram, SBI Group, Standard Chartered, Sumitomo Corporation, and Visa alongside Circle. More than 100 builders worked on the private mainnet ahead of launch.

"Our participation as a founding validator on Arc reflects that commitment, supporting trusted, interoperable infrastructure that can help connect emerging blockchain networks with the broader financial systems businesses rely on every day," said Jorn Lambert, chief product officer at Mastercard. Anthony Soohoo, chairman and CEO of MoneyGram, called Arc infrastructure that makes stablecoins practical for real-world payments. Visa's Rubail Birwadker described compliant, high-trust infrastructure for onchain payments.

Ole Matthiessen of Standard Chartered called the launch progress toward trusted and compliant onchain applications for institutions. Visa's Rubail Birwadker described compliant, high-trust infrastructure for onchain payments.

BlackRock brings the heaviest weight. It expects to deploy BUIDL, its USD Institutional Digital Liquidity Fund, on Arc through native USDC integration, letting institutions subscribe, redeem, and deploy inside one onchain environment. "Stablecoins and tokenized assets are inextricably linked within the future of financial market infrastructure," said Robert Mitchnick, BlackRock's global head of digital assets. "Purpose-built rails like Arc can support faster settlement, improved collateral mobility, and broader institutional adoption of digital assets."

DTCC brings the longest timeline and the clearest rationale. Its multi-chain strategy targets accelerated settlement, enhanced asset mobility, extended trading hours, and lower cost and operational friction. DTC-tokenized assets would keep the same protections, rights, and safeguards as traditionally held assets. "Our integration with Arc reinforces our commitment to building connected, onchain digital market infrastructure," said Frank LaSalla, DTCC president, CEO, and director. Circle is working with the clearinghouse to tokenize assets held at The Depository Trust Company on Arc starting in the second half of 2027. That would allow stablecoin-native settlement outside DTC against DTC-tokenized assets, keeping the protections of traditionally held assets. BlackRock, BNY, DTCC, and Standard Chartered are each exploring further integrations across settlement, custody, stablecoin access, and repo.

More than 100 ecosystem and enterprise builders from banks, asset managers, and DeFi protocols worked on the private mainnet ahead of launch, Circle said. Day one already has tenants across borrowing, trading, card settlement, custody, and cross-network movement. DeFi and capital allocators include Aave, Aerodrome, FalconX, Galaxy, GSR, Keyrock, Morpho, Nonco, Uniswap, and XFX. Rain, Thunes, and Wirex route payments across cards, consumer platforms, and cross-border flows. Binance Wallet, Chainlink, Fireblocks, Kraken, Ledger, MetaMask, Uniswap Labs, and Upbit handle custody and access. Bitget Wallet supports Arc from launch day. On Sept. 15, meme-coin launchpad Pools announced it would be Arc's first launchpad, which Arc's product lead confirmed by retweeting, according to PANews reporting carried by Gate.

At launch Circle plans a product suite around the chain: a composable application framework for common onchain workflows, AI-assisted tools for building applications and smart contracts, capabilities for issuers to deploy and manage tokenized real-world assets, and interfaces for developers, users, and agents. BlackRock, BNY, DTCC, and Standard Chartered are each exploring further integrations across settlement, custody, stablecoin access, and repo.

Circle's paperwork tempers the pitch. Arc runs on a permissioned validator set. No regulator, including the New York State Department of Financial Services, has reviewed or approved it. Arc Network Services provides software only, not regulated financial services. Features can be modified, delayed, or cancelled without notice. Smart contract bugs, network disruptions, and transactions with no recourse are listed as inherent risks. Neither Arc's operator nor its validators take responsibility for third-party applications built on the network, the disclaimers add.

"Arc is built on a simple premise: that the global financial system deserves a blockchain network it can trust," said Jeremy Allaire, Circle's co-founder, CEO, and chairman. "Arc is ready for a September 16 launch."

After tomorrow, the next dated commitment is the DTCC tokenization work in the second half of 2027.

Image: Circle's founding validator cohort announcement for Arc. Source: Circle pressroom.