Abstract: A blockchain integration layer uses mappings, for each blockchain of a plurality of blockchains, to integrate blockchain data into a database. A user interface may be presented that allows a user to view the blockchain data from the database, create data for the blockchain in the database, or both. Based on the created data for the blockchain in the database, the blockchain integration layer may modify the blockchain to store the created data. Standardized mappings are used to define the transformations to be used to convert data stored in blockchain blocks into a usable format for external systems. A set of JavaScript object notation (JSON) objects, one for each supported message type, may be used to define the set of transformations to support a blockchain. Using multiple sets of JSON objects, the blockchain integration layer integrates multiple blockchains with the external systems.