A non-transitory computer tangible medium is disclosed containing instructions for securing a large data set with a blockchained Merkle B-Tree. These instructions provide for accessing a large data set stored within a digital storage device, assigning each object of the large data set to a node of a Merkle B-Tree, and generating vertical blockchains that begin with a root node of the Merkle B-Tree and extend outward toward leaf nodes of the Merkle B-Tree based on data within each object. As a result, vertically blockchained Merkle B-Tree for containing the large data set as data are formed.