Method For Registration Of Data In A Blockchain Database And A Method For Verifying Data

A method for registration of a digital document as a digital file in a blockchain database and for verifying the digital document, in which a plurality of database transactions are constructed of a plurality of data containers, in a system comprising a plurality of storage nodes for storing at least a portion of the blockchain database, a plurality of approval nodes for approving transactions in the blockchain database and a first computer for generating transactions in the blockchain database, the computer having access to the blockchain database and having access to a first private key, comprising the steps of:

• a) providing a first set of data, relating to the contents of the digital file;
• b) providing a second set of data, relating to the origin of the digital file;
• c) generating a third set of data by merging a header, the first set of data, the second set of data and a suffix into a data frame, where the header contains information about a size of the first set of data, while the size of the suffix is adjusted between zero and a size of a standard data container used in the blockchain database such that the size of the data frame is a multiple of the size of the standard data container used in the blockchain database;
• d) dividing the third set of data into an integer number N≥1 of parts of equal size, the size corresponding to the size of the standard data container used in the blockchain database;
• e) generating, by the first computer or an intermediary computer connected to the first computer and one or more of the approval nodes, a single blockchain database transaction for all the N parts obtained in the step d), signing the transaction by the first private key and sending the transaction and a first public key matching the first private key to one or more of the approval nodes for approval;
• f) obtaining approval for the transaction from one or more of the approval nodes;
• g) registering the transaction approved in the step f) in a block of the blockchain database with a timestamp of registration by the one or more storage nodes;
• registering the digital document as the digital file in the blockchain database by the first entity;
• and transmitting the digital document from the first entity to a second entity.