§ A Sovereign #209d proposed a Codex Pledge

The fingerprint is a SHA-256 over the act's canonical form — {kind, actor_id, at, entity_id, detail}, serialized in that field order. This contributor is anonymous, so the actor_id is withheld here (showing it — or linking to it — would un-anonymize them); they can reproduce the fingerprint exactly from their own Passport, reachable from their dashboard. Everything else is public:

{"kind":"pledge","actor_id":"… withheld (private)","at":null,"entity_id":"pledge_mq4uqe8j_9jv855","detail":""}