BALLOT RECEIPT  (arcaeon-receipt)
Issued (UTC): 2026-09-09T23:58:02Z

WHAT THIS RECEIPT PROVES
  - the score and the ballot are unaltered since the timestamp
WHAT THIS RECEIPT DOES NOT PROVE
  - the score is correct
  - the sim was not attempted before

Method: sha256 digest of the canonical JSON ballot object (score, verdict, and whatever fields the grading engine produced), bound to a stated timestamp inside the receipt body; hash-chained in arcaeon-ledger, one row per ballot.

SUBJECT
  trainee: a. dubois
  scenario: call_taking.gen79_noise_late_music
  grader: call_taking.grader

RESULTS (1 check)
  a. dubois  call_taking.gen79_noise_late_music  score=64 THIN  grader=call_taking.grader  at 2026-09-09T23:58:02Z

INTEGRITY
  body digest: sha256:json-c14n:v1:4233a8b9111376912d3383d58756d894e851acfaeafe85d47fc1cbfbfbf8b6cb
  ledger: namespace=ballot rows=6 chain=02fbe19328d5f97f1cdaf017965dedff
  witness: local-file (none (self-controlled file))
  anchor: none status=skipped

To verify: recompute the body digest from the JSON receipt's body fields (canonical JSON, sha256), compare to body_digest; if an OpenTimestamps proof is attached, write the body_digest plus a newline to a file, save the proof beside it, and run `ots verify`. No contact with the issuer is required.
