Ethereum Attestation Service | 165 followers on LinkedIn. Open-source public good for making attestations on or off chain about anything. | Ethereum Attestation Service (EAS) is a public good that enables anyone to make attestations on or off-chain about anything. You simply register a schema (or use an existing one) about any topic and make attestations using that schema. In order to decentralize more than money and assets there needs to be a generic ledger for making statements on Ethereum.