Merkle Tree
Fleeting- External reference: https://en.wikipedia.org/wiki/Merkle_tree
In cryptography and computer science, a hash tree or Merkle tree is a tree in which every leaf node is labelled with the cryptographic hash of a data block, and every non-leaf node is labelled with the cryptographic hash of the labels of its child nodes. Hash trees allow efficient and secure verification of the contents of large data structures. Hash trees are a generalization of hash lists and hash chains.
It could be seen as an event sourcing of integrity checked blocks.