Hashing the pick's canonical bytes with your device's SHA-256.
This is to certify that the pick recorded below was
cryptographically committed to Saturday Racing's transparency
ledger before the race ran. The commitment is a SHA-256
leaf hash of the canonical bytes; any subsequent tampering
breaks the hash and this certificate turns red. The check
runs on the reader's own device — no trust required from us.
This is the exact JSON that was hashed. Copy it, run sha256sum on it yourself, and you should get the leaf hash above.
{"attribution":{"pick_source":"story_score","prompt_version":"htw_backfill_v1"},"committed_at":"2026-07-13T21:10:28Z","issuer":"saturday-racing.com","predicted_at":"2026-07-07T08:56:15Z","product":"horses_to_watch","product_lane":"","race":{"course":"Nottingham","external_id":"rac_11977225","internal_id":2088,"race_date":"2026-06-25","race_time":"10:30"},"schema":"sr-pick-v1","selection":{"advised_odds":"11/8","confidence_final":"Medium","confidence_raw":"","horse":"Food For Thought","position_claim":"win"}}
The Merkle proof
Each hop is a sibling hash. Your browser walks these from the leaf up to the root, hashing pairs at each step.