Ownership Proof
Also known as: Wallet Verification, Digital Signature Proof, On-Chain Identity Check
A verifiable method to prove control or possession of a digital asset, wallet, or on-chain identity.
Ownership proof in blockchain is a cryptographic method to demonstrate that a user controls a specific wallet, digital asset, or on-chain identity. This is typically done by signing a message with the private key corresponding to a public address. Ownership proofs are used in KYC-free authentication, DAO voting, NFT airdrops, and token claims. They allow for permissionless interaction without revealing sensitive data. Wallets like MetaMask and Ledger support signing capabilities to generate these proofs securely. Standards like EIP-4361 (Sign-In with Ethereum) formalize identity ownership across dApps.