Ledger

Six pieces of standard cryptography, each doing one small job exactly: RFC 8785 canonical JSON so two parties hash the same bytes, a hash chain so a line cannot be edited unnoticed, RFC 6962 Merkle proofs so one record is provable without shipping the log, C2SP signed checkpoints so a tree head has an author, Blum commit–reveal so nobody picks a number after seeing yours, and a beacon-plus-VDF time bracket that bounds a record from below in time. Every result below is recomputed in your browser and every failure case is run, not described.