Abstract: The disclosed technology relates to identity verification in blockchain transactions. An exemplary identity management system may receive an authorization request that can include a wallet address, a blockchain network identifier, a dApp smart contract address, a function signature, transaction data, and a redirect address. The wallet address is enrolled by providing obtained user data to a KYC provider system, receiving validated user data, providing the validated user data to a sanction provider system, and receiving a sanction list result. A access token is issued that includes an issuer identifier, the function signature, the dApp smart contract address, and an indication of wallet address successfully enrollment. A message is then returned that includes the access token and the transaction data. The dApp smart contract is configured to execute the function after verifying the access token via an identity verification smart contract that is inherited by the dApp smart contract.