VERIFIED · SR-PICK-V1 · SATURDAY RACING · VERIFIED · SR-PICK-V1 ·
SR
AUTHENTICATED
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 Karthala
Race Uttoxeter · 15 July 2026 · 14:48
Product Pick Winner (Mr Fox)
Advised odds 13/2
Confidence Medium
Prompt version v3_b557cbd4
Predicted at 2026-07-15T07:02:29.928233+01:00
Cryptographic Seal
Leaf hash
d2282a35d34aec6a7b3c3261f819aea4dc45ec87db22efde73467c0b85455273
Your browser
…
Batch
15 July 2026 · 60 leafleaves
· inspect batch →
Merkle root
e4408eaba1df1a5c38c539864028dfae01482f63ce7383bbf8cabee5597ad9af
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":"llm","prompt_version":"v3_b557cbd4"},"committed_at":"2026-07-15T06:02:29Z","issuer":"saturday-racing.com","predicted_at":"2026-07-15T06:02:29Z","product":"pick_winner","product_lane":"","race":{"course":"Uttoxeter","external_id":"rac_13000000754","internal_id":2909,"race_date":"2026-07-15","race_time":"14:48"},"schema":"sr-pick-v1","selection":{"advised_odds":"13/2","confidence_final":"Medium","confidence_raw":"Medium","horse":"Karthala","position_claim":"win"}}
Copy JSON
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
cf527dfeaa15c376ae2318eb328606925c6a00d7fe1df2262972b78f97096b39
2
right
a8ef5b79c79a199250abc22afd453fb2077447cb10c1b696597dc1043e854580
3
left
71308fd3bf5a012aebba685f16ab2dc75bff510ef64ca228f04dcc16a03c4ae3
4
left
01bec617f3c9dcec2d24ddfdf1511e44e03d5e337125ce0af38979af7e1974cb
5
right
b515c4062c3466a174cab79d6cae7fdd99f13b4cb437863182cf5a599fb5f6e3
6
left
a97ebc0af6d0bd8915ad767e20d6c0d431d4e17d2e05f92661ab8e4d6c8f2844
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