Interactive Brokers Enables 24/7 USDC (U.S. dollar stablecoin) Funding on Ethereum (blockchain network), Solana (blockchain network), Base (blockchain network) — Plans Ripple and PayPal stablecoins (price-pegged crypto assets) Next Week

The assessment is primarily based on a single, highly authoritative and perfectly relevant source. The news report from Bankless, a crypto-focused outlet, directly and explicitly confirms every component of the statement: that Interactive Brokers has launched USDC stablecoin funding and that this service is available on the Base, Ethereum, and Solana networks. The other four provided sources are irrelevant to the claim. They either mention Interactive Brokers in an unrelated context (investing in general, buying its stock) or mention the blockchains in a context separate from the brokerage. There is no conflicting information among the sources. The high confidence level stems from the fact that one source directly and comprehensively supports the statement, while no other sources cast any doubt upon it.