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 Celtic John
Race Lingfield (AW) · 13 July 2026 · 19:40
Product Pick Winner (Mr Fox)
Advised odds 4/1
Confidence Medium
Prompt version v3_b557cbd4
Predicted at 2026-07-13T09:38:14.759529+01:00
Cryptographic Seal
Leaf hash
2a2031f763d7df7e9a7de5455bb036f24b1bdd76cff99339956d9d909b194e8c
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":"2026-07-13T08:38:14Z","product":"pick_winner","product_lane":"","race":{"course":"Lingfield (AW)","external_id":"rac_13000001729","internal_id":2797,"race_date":"2026-07-13","race_time":"19:40"},"schema":"sr-pick-v1","selection":{"advised_odds":"4/1","confidence_final":"Medium","confidence_raw":"Medium","horse":"Celtic John","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
2b58f835e975495333523a392c30232853492d5d019c6f4b33cd05e9a38ed49e
2
left
74a5c652335696c785934b04cbc95578e3e82b73b5965ed24b9cc8d78f780847
3
left
6772386995b40493f7d721e2ad80101ab58ea47f6c50afe5989939e6b525198d
4
left
ab1290d4ebe0bec6f89ffdf43e3e0b01a041cfca7479a2030c73de213097926c
5
left
671e30e2e0c413e9f6557469a276abe44c7c6c9df2103b24b8dbf131cfd03238
6
left
d2f5951c321258f1da44d8e3609710b4c9c90fac4d41e3ca7536c70ae340789e
7
left
0af567e55c1ca3698f0d247913af3961bd1e207eb3c7b8dd318659719ff7e32e
8
right
7f26ee208367c64ad8017566de1de4e6ffc26d447963c5f0ab2e3225cec0656b
9
right
a37bae6f6b56af99833b4e131855bb087cd4e3a90918a4dfd59d83ac87f8f303
10
right
e25c8d2b935f54f140bee5f6c7b02a176294b2ed6153543d94a92504abeba294
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