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 Rockvale
Race Stratford · 12 July 2026 · 15:00
Product Pick Winner (Mr Fox)
Advised odds 5/2
Confidence Medium
Prompt version v3_b557cbd4
Predicted at 2026-07-12T09:28:39.987818+01:00
Cryptographic Seal
Leaf hash
193c7ee81bb525e915c42214999c19ada2c07cbf1980bc788e29fd05350a2801
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":"2026-07-12T08:28:39Z","product":"pick_winner","product_lane":"","race":{"course":"Stratford","external_id":"rac_11987911","internal_id":2765,"race_date":"2026-07-12","race_time":"15:00"},"schema":"sr-pick-v1","selection":{"advised_odds":"5/2","confidence_final":"Medium","confidence_raw":"Medium","horse":"Rockvale","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
194948a2ab72d1cb15ec5ef0311aed80ea0bcf1f57129abc4d616e678cc226d7
2
left
d9cde149af1250dda4f627ec5865551b3ce90409275d5dc159452ff0f1619ed1
3
right
374d6fd98791dbb80d41d4e00884b3e4fbe185bf5ea560f52102c5ba53811010
4
right
5eaa7643dff9394ac1c02bb346859b698f26933dbe81734f6f7345e93607eec0
5
left
62315c85243320991c5085b922e30fc067435bbc3350b83dd5a5a1778045c268
6
right
9bf4f078d9681658c6a8e3b6821b776c17a3347c9178f3ba02ba1f2792cfe5c4
7
left
0af567e55c1ca3698f0d247913af3961bd1e207eb3c7b8dd318659719ff7e32e
8
right
7f26ee208367c64ad8017566de1de4e6ffc26d447963c5f0ab2e3225cec0656b
9
right
a37bae6f6b56af99833b4e131855bb087cd4e3a90918a4dfd59d83ac87f8f303
10
right
e25c8d2b935f54f140bee5f6c7b02a176294b2ed6153543d94a92504abeba294
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