Cross-chain transaction existence verification method and system based on deep learning

The invention discloses a cross-chain transaction existence verification method and system based on deep learning, and belongs to the technical field of block chains, and the method comprises the steps: obtaining a to-be-transacted block chain; when the to-be-transacted block chain is a heterogeneous chain cross chain, extracting a verification party corresponding to each block chain in the to-be-transacted block chain and a transaction chain corresponding to each block chain, and generating a verification party-transaction chain mapping group; constructing a hash time lock verification contract; and inputting the verification party-transaction chain mapping group into a third-party sharing platform, carrying out transaction within a preset locking duration to obtain a cross-chain transaction result, and carrying out existence verification to obtain an existence verification result. The technical problem that in an existing block chain network, due to under-chain transmission and heterogeneous chain differenc