Certificate of Pick Authentication #389 · 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: Kittys Glance
Race: Newton Abbot · 3 July 2026 · 14:45
Product: Top Rated Today (Sly Man) · Top Rated — Top Signals
Advised odds: 7/4
Confidence: Speculative
Prompt version: top_rated_v1_2026-07-08
Predicted at: 2026-07-08T22:13:45.755032+01:00

Cryptographic Seal

Leaf hash: d714c00f33bc3d8990d85ee6384a21ea73b509cb1d72a69dec21ca1ac10d22dd
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":"2026-07-13T21:10:28Z","issuer":"saturday-racing.com","predicted_at":"2026-07-08T21:13:45Z","product":"top_rated","product_lane":"signals","race":{"course":"Newton Abbot","external_id":"rac_11987508","internal_id":2416,"race_date":"2026-07-03","race_time":"14:45"},"schema":"sr-pick-v1","selection":{"advised_odds":"7/4","confidence_final":"Speculative","confidence_raw":"","horse":"Kittys Glance","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	d69212e81537ccd840b71bd3ec71aabefe948fc07294cc802de2c145e6f38750
2	right	29b6c73b6aec18d6f32eec32cbb73c4e3f23ac7217d88a0a922dc1dca8081338
3	left	f07d7a2084336115a6db98587701fc5003cc97e295cb50894b6744676719f495
4	left	998d47dceab3df10fa0099328a45be6e921d1aceb6b2cda42de4c71b6752c117
5	left	ae4e640877ec7e1ed0aa1ecb43c4375691164ecfe38c620f45929139e686dc8f
6	right	8d365ed1fcd50ce4692074b8d288bcbca840a0024697303b2be824fc4a5251f3
7	left	18098d0ad2005f6c8a767a2aceec92cb16c50e0350a0aeb358818e8c739d9967
8	right	f384b0629d9042022b8062f38497000b02dafa843e81b7fba3c37144f3b49f92
9	right	559310ef76957df08e5f62efc49ff6649a36113b72a52a9a4471bd1801615514
10	left	f294ff8c83ee2bf537f6f3a850e09ef12f44b3915f1df793eb9ebfc3a7648f55

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