Certificate of Pick Authentication #327 · Saturday Racing

Verifying in your browser…

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.

The Pick

Horse: Badri
Race: Pontefract · 7 July 2026 · 15:18
Product: Top Rated Today (Sly Man) · Top Rated — Top Signals
Advised odds: 11/4
Confidence: Speculative
Prompt version: top_rated_v1_2026-07-08
Predicted at: 2026-07-08T22:13:45.288118+01:00

Cryptographic Seal

Leaf hash: 8e6aaac846d62f06ea4e3570a3ed78c1edfac17ce609e76e2c2a942e3b4848dc
Your browser: …
Batch: 13 July 2026 · 709 leafleaves · inspect batch →
Merkle root: eba1d4cb07b18df5f26ea6211dae664c2a8d9ce7bdcd95a3a7d9da03ed6cf62b
Your browser walk: …
On-chain: Off-chain verified. Anchoring on-chain is a separate, gas-gated step.

Technical appendix — canonical bytes & Merkle proof

The canonical bytes

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":"top_rated_v1_2026-07-08"},"committed_at":"2026-07-13T21:10:27Z","issuer":"saturday-racing.com","predicted_at":"2026-07-08T21:13:45Z","product":"top_rated","product_lane":"signals","race":{"course":"Pontefract","external_id":"rac_11990095","internal_id":2551,"race_date":"2026-07-07","race_time":"15:18"},"schema":"sr-pick-v1","selection":{"advised_odds":"11/4","confidence_final":"Speculative","confidence_raw":"","horse":"Badri","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.

#	Position	Sibling hash
1	left	8e2ddc10475b2f41bf546859925655bcdb7f093272507bd2d55d5167cb708f33
2	left	e1636797cf559af0ae03d573ebe4b221556de04ad8713d2f226485e58744dab4
3	right	0bf0b6228120889a5499a7e86dddb16082806101c1f3206472b6ccb842b4490f
4	right	b589976bb0310e100b89188454576986991b17e90dfa591df5cbe75341a811f3
5	right	fe08e96ade7fc821154c30afa831e006a5b4ee8fe67c36f3e2da45d09ac142e9
6	left	de4c18b344759b795e65fd7d556764fb84fe70fe3ed694d8fbe24938047d102e
7	right	4c56aa4f1d1039c6ad4821c5c72376f7d1ccb9ab4f942fb7d343352d40712b8c
8	left	9a677d21c2cd9160c97a508996b4307c85b3aa9b95597b3eca8c62f864ebab76
9	left	c1144f953d5061b1e3ec979350290e5e7106de524b96bf728133a9efff0efd59
10	right	e25c8d2b935f54f140bee5f6c7b02a176294b2ed6153543d94a92504abeba294

Server-reported status: off_chain_verified · Ledger overview at /verify/