Claims hash
The claims fingerprint, a SHA-256 hash, under the item-claims byte prefix 0x11, of the JCS-canonicalized claims a user submitted and nothing else; independently reproducible by anyone holding the claims, and one of the two inputs bound into the item's composite fingerprint.
Overview
The claims hash is the SHA-256 hash of exactly what you submitted: your claims map is put into canonical byte form with JCS and hashed under the item-claims byte prefix 0x11. Nothing Truestamp generates is mixed into it, so anyone holding a copy of the claims can recompute the hash and compare, without trusting Truestamp. In prose Truestamp calls it the claims fingerprint. It is one of the two independent fingerprints described in the item’s composite fingerprint: the claims hash and the metadata hash are both inputs to the item hash that enters the Merkle tree. The prefix mechanics are covered in domain-separated hashing.