Overview

Committed is the normal resting state on both of Truestamp’s ledgers, with two related meanings. An item becomes committed when its item hash is included as a Merkle-tree leaf in a finalized block; this is Item Commitment, and from that point the item is verifiable. A block is created finalized and becomes committed when its block hash is covered by an epoch whose Merkle root is recorded on a public blockchain; this is Block Commitment. The two events are distinct and a complete proof depends on both: a downloadable proof for an item is only issued once its covering block has at least one public-blockchain commitment. The distinction is explained in Item Commitment vs Block Commitment and the batching in the epoch concept.