Verifying a blockchain-type ledger

A non-transitory, computer-readable medium storing one or more instructions executable by a computer system to perform operations comprising:

• receiving, by a server that stores data using a blockchain-type data storage ledger, a verification request for verifying data that is currently stored in the blockchain-type data storage ledger, wherein the verification request comprises a hash value of a data record of the blockchain-type data storage ledger;
• obtaining, by the server, the data record of the blockchain-type data storage ledger that corresponds to the hash value to be verified;
• obtaining, by the server, a value of a service attribute included in the data record, wherein the service attribute is an identification field of the data record;
• determining, by the server, a set of data records of the blockchain-type data storage ledger that each include the value of the service attribute;
• determining, by the server, data blocks of the blockchain-type data storage ledger that store data records included in the set of data records;
• and
• performing, by the server, integrity verification on the data blocks that store the data records included in the set of data records, the performing comprising:
• writing, into a shared memory, for each data block of the data blocks that store the data records included in the set of data records, (i) a block height of the data block, and (ii) a verification status of the data block;
• creating multiple verification threads for verifying the data blocks;
• obtaining each data block having a verification status that indicates that the data block has not been verified, based on the block height and the verification status of the data block according to the shared memory;
• using the multiple verification threads to verify, in parallel, the data blocks that have been obtained;
• and
• updating the verification statuses of the data blocks in the shared memory to indicate their current verification statuses.

A computer-implemented system, comprising:

• one or more computers;
• and
• one or more computer memory devices interoperably coupled with the one or more computers and having tangible, non-transitory, machine-readable media storing one or more instructions that, when executed by the one or more computers, perform one or more operations comprising:
• receiving, by a server that stores data using a blockchain-type data storage ledger, a verification request for verifying data that is currently stored in the blockchain-type data storage ledger, wherein the verification request comprises a hash value of a data record of the blockchain-type data storage ledger;
• obtaining, by the server, the data record of the blockchain-type data storage ledger that corresponds to the hash value to be verified;
• obtaining, by the server, a value of a service attribute included in the data record, wherein the service attribute is an identification field of the data record;
• determining, by the server, a set of data records of the blockchain-type data storage ledger that each include the value of the service attribute;
• determining, by the server, data blocks of the blockchain-type data storage ledger that store data records included in the set of data records;
• and
• performing, by the server, integrity verification on the data blocks that store the data records included in the set of data records, the performing comprising:
• writing, into a shared memory, for each data block of the data blocks that store the data records included in the set of data records, (i) a block height of the data block, and (ii) a verification status of the data block;
• creating multiple verification threads for verifying the data blocks;
• obtaining each data block having a verification status that indicates that the data block has not been verified, based on the block height and the verification status of the data block according to the shared memory;
• using the multiple verification threads to verify, in parallel, the data blocks that have been obtained;
• and
• updating the verification statuses of the data blocks in the shared memory to indicate their current verification statuses.