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 Park Hall
Race Newton Abbot · 13 July 2026 · 17:15
Product Pick Winner (Mr Fox)
Advised odds 10/11
Confidence Medium
Prompt version v3_b557cbd4
Predicted at 2026-07-13T09:34:25.993850+01:00
Cryptographic Seal
Leaf hash
88851cb34be6697f7a8dadf7ffe1c032a621285e52be2b2f984369795c9dc3dc
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":"llm","prompt_version":"v3_b557cbd4"},"committed_at":"2026-07-13T21:10:26Z","issuer":"saturday-racing.com","predicted_at":"2026-07-13T08:34:25Z","product":"pick_winner","product_lane":"","race":{"course":"Newton Abbot","external_id":"rac_13000001898","internal_id":2805,"race_date":"2026-07-13","race_time":"17:15"},"schema":"sr-pick-v1","selection":{"advised_odds":"10/11","confidence_final":"Medium","confidence_raw":"Medium","horse":"Park Hall","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
right
88c2f406f47db0212a19d5eedc2818e31eb23b200ac08a53a419b800751dabe6
2
left
2715d284820e28a0abf6666d6de5d2ce6d21d197442cbc6a2a30d40dc869ea0b
3
right
476337b27cfe68c694a5e30006b77bcfbf1bc2d310c177cf9724fc32d0dea09b
4
left
3c66b199767f094303781e5ce3f08d349d3262094eae7a029e0035ae3fa8ceb6
5
right
eb17e33f2f5cadee3c74fb941d20e5b7162c8357ed519bf251859b425f77bffe
6
right
9cd04c901322f010a3f4b765f8334a04feb06990354fccd9484e7e135228e743
7
right
4c56aa4f1d1039c6ad4821c5c72376f7d1ccb9ab4f942fb7d343352d40712b8c
8
left
9a677d21c2cd9160c97a508996b4307c85b3aa9b95597b3eca8c62f864ebab76
9
left
c1144f953d5061b1e3ec979350290e5e7106de524b96bf728133a9efff0efd59
10
right
e25c8d2b935f54f140bee5f6c7b02a176294b2ed6153543d94a92504abeba294
Print / save this certificate