Moonstone Research · living report
The Integrity Ledger
What our data pipeline caught, missed, and fixed · as of 2026-08-05 · published monthly
36,132
sold listings screened
177
bulk-lot floods collapsed
largest: 86× $15 on 2026-07-21
2
rows flagged disputed
provider or curve disagreement
3,436
verified grade rows served
The audit record
| Date | Sample | Wrong-card comps surviving | Correct comps discarded |
|---|---|---|---|
| 2026-08-03 | 50 random slabs (first audit) | 4.3% | 40.7% |
| 2026-08-03 | 50 random (post-fix) | 0.88% | 7% |
| 2026-08-04 | 50 random (third) | 0.3% | 1.83% |
| 2026-08-04 | 50 adversarial | 2.3% | — |
| 2026-08-04 | 50 adversarial (post-fix) | 2% | 0.4% |
| 2026-08-04 | 50 adversarial, exact-membership | 1.96% | 13% |
Audit rows are measured by independent adversarial test runs against production and appended verbatim — the trajectory includes our regressions, because a ledger that omits them isn't one.