Identity verification method and system

The invention relates to the technical field of computers, and discloses an identity verification method and system, which can realize cross-country identity verification on the premise of meeting data outbound management and control of various countries. The method comprises the following steps that: an application which needs an identity verification service sends a first request to a digital identity client, wherein the first request comprises an identity and first information; the application receives signature information returned by the digital identity client and a public key corresponding to the identity identifier, wherein the signature information is obtained by allowing the digital identity client to a private key corresponding to the public key to digitally sign the first information; the application sends a second request to a first node of the first block chain, and the second request comprises signature information and a public key, so that the first node performs verification according to the signature information and the public key; and the application receives a verification result of the verification returned by the first node, and carries out identity verification according to the verification result.