Data storage, data check, and data linkage method and apparatus

A non-transitory computer-readable storage medium, configured with instructions executable by one or more processors to cause the one or more processors to perform operations comprising:

• receiving a data backtracking request, the data backtracking request comprising a version identifier of a first data version of a target object that is stored external to a blockchain;
• setting the version identifier of the first data version as a starting version identifier and executing one or more iterations of the following operations:
• searching, in the blockchain, for a target data block containing the starting version identifier;
• obtaining, from the target data block, a version identifier of a data version prior to the starting data version;
• and
• setting the starting version identifier to be the obtained version identifier;
• terminating the one or more iterations of the operations when obtaining a data block comprising a version identifier of an initial data version of the target object, wherein the data block comprises a check value that is null;
• determining, based on at least one data block comprising the version identifier of the initial data version, data content corresponding to the initial data version of the target object by obtaining the data content from a cloud data gateway or a cloud database based on the version identifier of the initial data version;
• and
• analyzing, based on the determined data content corresponding to the initial data version of the target object, an evolution process of the target object to ensure authenticity of data evolution.

A system comprising a processor and a non-transitory computer-readable storage medium storing instructions executable by the processor to cause the system to:

• receive a data backtracking request, the data backtracking request comprising a version identifier of a first data version of a target object that is stored external to a blockchain;
• set the version identifier of the first data version as a starting version identifier and execute one or more iterations of the following operations:
• searching, in the blockchain, for a target data block containing the starting version identifier;
• obtaining, from the target data block, a version identifier of a data version prior to the starting data version;
• and
• setting the starting version identifier to be the obtained version identifier;
• terminate the one or more iterations of the operations when obtaining a data block comprising a version identifier of an initial data version of the target object, wherein the data block comprises a check value that is null;
• determine, based on at least one data block comprising the version identifier of the initial data version, data content corresponding to the initial data version of the target object by obtaining the data content from a cloud data gateway or a cloud database based on the version identifier of the initial data version;
• and
• analyze, based on the determined data content corresponding to the initial data version of the target object, an evolution process of the target object to ensure authenticity of data evolution.