Claims
The user-supplied data map an item is made of - a required name plus optional external content hash and algorithm, description, URL, location, freeform metadata, and user timestamp, JCS-canonicalized so the claims hash stays independently reproducible by the submitter.
Overview
Claims are the user-supplied data map an item is made of. A claims map has a required name and optional fields: a hash of external content together with its algorithm (supplied together or omitted together), a description, a public HTTPS URL, geographic coordinates, a freeform metadata object, and a user-provided timestamp. The map is canonicalized with JCS into a single deterministic byte form before hashing, so the claims hash covers exactly what you submitted and nothing else, and anyone holding a copy of the claims can recompute it without trusting Truestamp. When the external hash is omitted, the claims content itself is the timestamped data of record, and the proof alone reconstitutes it. The claims hash is one of the two inputs bound into the item’s composite fingerprint, and the proof bundle format describes how a proof carries its subject data.