Open USD Stablecoin Launch on Base Draws BlackRock, Visa, Mastercard

The Open USD stablecoin (OUSD) is launching on the Base blockchain, backed by a consortium of over 140 partners that includes BlackRock, Coinbase, Mastercard, Stripe, and Visa. The stablecoin uses the B20 token standard, which offers fixed precision and an immutable currency code – features designed for enterprise payment systems rather than retail speculation.

The launch follows Base's Beryl upgrade, which cut gas costs and improved throughput. That technical shift matters because stablecoin settlement at scale demands low transaction friction. A stablecoin carrying the B20 standard on a low-cost L2 network is a different product from the ERC-20 stablecoins that dominate DeFi today.

The partner list is the story here. BlackRock's presence signals institutional interest in onchain dollar representation that goes beyond crypto-native use cases. Stripe's involvement points toward merchant settlement. Visa and Mastercard have been experimenting with stablecoin rails for years, and their backing of OUSD suggests the infrastructure is moving past pilot phases. Coinbase, which built Base, gets a native stablecoin on its own chain without the regulatory overhead of issuing one directly.

For the stablecoin sector, the launch adds another competitor to a market dominated by USDT and USDC. Tether's market cap sits above $140 billion; Circle's USDC is near $60 billion. OUSD starts from zero but carries a consortium structure that could accelerate enterprise adoption faster than either incumbent. The B20 standard also differentiates it from the ERC-20 tokens that most stablecoins use, which could matter for compliance and interoperability in regulated markets.

The read-through for Base is clearer. A major stablecoin launch with this partner set validates the chain as a settlement layer for real-world assets. The RWA Tokenization Draws 29% of New Crypto Startups, Report Finds trend has mostly played out on Ethereum mainnet. Base, with lower fees and Coinbase distribution, could capture the next wave.

What would confirm the thesis: transaction volume on OUSD exceeding $1 billion within six months of launch, or a public integration announcement from one of the partner firms naming a specific use case. What would weaken it: the stablecoin remaining a proof-of-concept with low adoption, or regulatory pushback from U.S. authorities on the consortium model.