Overview

In Truestamp, a commitment is the act of recording a hash in a durable place where it can later be checked independently. The word covers two distinct, load-bearing events, and a complete proof needs both: Item Commitment, where an item’s hash becomes a leaf in the Merkle tree of a finalized Truestamp block, and Block Commitment, where a batch of block hashes is Merkle-rooted into an epoch whose single root is recorded on a public blockchain such as Stellar or Bitcoin. The first event ties an item to Truestamp’s internal ledger; the second ties that ledger to an independent external witness. The distinction is explained in depth in Item Commitment vs Block Commitment, and the sequence in which the two events happen and strengthen a proof is walked through in the proof lifecycle.