Make hindsight fail the hash test.
Commit the exact forecast before its horizon, test a rewrite, then verify the original bytes. Integrity proof only; not trusted-time notarization or financial advice.
Create the commitment before testing any rewrite.
Original-
Rewrite test-
Original verify-
SHA-256 commitment will appear here.
Canonical order: version, author, market, prediction, horizon, confidence_percent, created_at.