Abstract: The present invention comprises a novel application of blockchain data structure for insurance certificate management generally consisting of an application server with logic for receiving and depositing insurance certificates, a private datastore for privately storing information, a translation element for translating information into the language of the blockchain data structure, and a blockchain structure. The blockchain structure is generally composed of cryptographically linked blocks, a tree that bundles transactions, and transactions as the base element with input and output components and a sending function with a cryptographic signature. The present invention therefore allows for four actions: putting to a private datastore, putting to a private datastore with a cryptographic hash to public blockchain data structure, fetching from a private datastore, and fetching directly from a public blockchain data structure.