Blockchain Attestations: Signing Is Not Proving

A blockchain attestation proves who signed a statement, not that the statement is true. Coinbase issued 723,690 on the Base network to certify verified accounts. This is the number recorded on October 19, 2026 on the EASSCAN explorer. The W3C, which sets web standards, reminds that verifying a credential does not amount to validating its content. An attestation is a declaration from one entity about another entity, such as an address, or about data. Decentralized identity is one of its building blocks. On Ethereum and its layer 2 networks, a dedicated protocol is called Ethereum Attestation Service, or EAS.