{
 "rule": "sma-50-volcap",
 "method": "Each record day is settled against the exchange's daily closes 1, 7 and 30 days later. hash = sha256(prev_hash + payload), genesis first, in seq order; payload.signal_hash is the hash of the record row it settles. Contents are published 7 days after the record day; recompute each hash to verify nothing was changed.",
 "rows": [
  {
   "seq": 1,
   "signal_day": "2026-09-24",
   "horizon": 1,
   "settled_at": "2026-09-26T20:42:29.110Z",
   "payload": null,
   "prev_hash": "genesis",
   "hash": "3a49480f0a98ff7f90a4fb42b1775234f5f95a28bb8661d72a6960445acb0060"
  }
 ]
}