Certificate of Pick Authentication #646 · 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: Tiny Riot
Race: Stratford · 12 July 2026 · 13:50
Product: Top Rated Today (Sly Man) · Top Rated — Top SR Ratings
Advised odds: 10/11
Confidence: High (raw 159)
Prompt version: top_rated_v1_2026-07-08
Predicted at: 2026-07-12T09:38:16.831374+01:00

Cryptographic Seal

Leaf hash: 4ab04ad674f8189edda477b95a94b683c77a3c56348b73a9902f1c761ed8d0e9
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":"2026-07-13T21:10:26Z","issuer":"saturday-racing.com","predicted_at":"2026-07-12T08:38:16Z","product":"top_rated","product_lane":"ratings_sr","race":{"course":"Stratford","external_id":"rac_11987898","internal_id":2763,"race_date":"2026-07-12","race_time":"13:50"},"schema":"sr-pick-v1","selection":{"advised_odds":"10/11","confidence_final":"High","confidence_raw":"159","horse":"Tiny Riot","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	49f2d3ac2694364075475fbd81690296b56ab83735f0ebc220d16567fa0c725a
2	left	b8a225ab0bda4a315c2428f6ba168cc211d7535f7eff0573bd47766f72cd48c1
3	left	6912e91d1ffdcddf323c271f925c51248045ad25e26e396728edee9d8fb60163
4	left	1ceadec64cf7a696853e9b43ad759033614cc53f5f4aa75506d3271fcc825f07
5	right	1a7c6b029f58cae1bf8086ed6fa83e42a03e521eed5dfafe556fe3f16191d19b
6	right	6eaf7a3b4dbf7de787d708e4aeca0643d7190dfd48ea1d758c6741d5876fc46d
7	left	abd1f2af8516869713aed81c9f26f27b73cfb533f542009e428008b662810a09
8	left	258ce92dcccd21d1d3bbbb39ac789ad1349e3db2aadbe660b7ed0a8637d8148f
9	right	a37bae6f6b56af99833b4e131855bb087cd4e3a90918a4dfd59d83ac87f8f303
10	right	e25c8d2b935f54f140bee5f6c7b02a176294b2ed6153543d94a92504abeba294

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