One or more embodiments of the present specification relate to data verification methods, apparatuses, and electronic devices. An example method includes obtaining a smart contract from a main chain network, determining, based on the smart contract, a sub-chain network corresponding to the main chain network and including a first blockchain node and a second blockchain node, sending through the sub-chain network, a data verification request that includes data to be verified, receiving a verification result and verification progress information, storing the verification result in the sub-chain network, and storing the verification progress information in the main chain network.