BLOCKCHAIN-BASED DATA VERIFICATION METHOD AND APPARATUS, AND ELECTRONIC DEVICE

摘要

One or more implementations of the present specification relate to the blockchain field, and in particular, to data verification methods and apparatuses, and electronic devices. The method can include: obtaining a data identifier of target data published by a data provider in a blockchain, where the data identifier indicates a storage location of the target data in the blockchain; determining whether the target data has been stored in the blockchain based on the data identifier; if the target data has been stored in the blockchain, obtaining the target data from the storage location indicated by the data identifier, where the target data stored in the blockchain carries verification information used to verify authenticity of the target data; and verifying authenticity of the obtained target data based on the verification information, and outputting a verification result to a data verifier.