Tipsterday

Daily digest

Each night every prediction of the previous day is folded into a single hash that also covers the day before it. Change one old prediction and every hash after it stops matching. Back to the track record

How to check a day yourself

  1. Fetch the day: GET /api/v1/track-record/digests/2026-09-22 — it returns the counts and hashes below.
  2. Take the last prediction of that day (its hash is on every match page) and recompute sha256(day | count | lastSnapshotId | lastSnapshotHash | previousRootHash).
  3. Compare it with the root hash. Any edited prediction changes it, and every later day with it.
  4. The anchor commit puts that root hash in a public repository, with a timestamp we do not control — so a rewritten history is visible, not deniable.

No day has been published yet — the first digest lands the morning after launch.