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 Tazaman
Race Doncaster · 9 July 2026 · 15:20
Product Pick Winner (Mr Fox)
Advised odds 11/4
Confidence Medium
Prompt version v3_b557cbd4
Predicted at 2026-07-08T18:57:24.420965+01:00
Cryptographic Seal
Leaf hash
6503877603555fb65111e86c783181ecf4fe604c0a89fe730e917bc864ee5f8d
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":"2026-07-13T21:10:27Z","issuer":"saturday-racing.com","predicted_at":"2026-07-08T17:57:24Z","product":"pick_winner","product_lane":"","race":{"course":"Doncaster","external_id":"rac_11990537","internal_id":2618,"race_date":"2026-07-09","race_time":"15:20"},"schema":"sr-pick-v1","selection":{"advised_odds":"11/4","confidence_final":"Medium","confidence_raw":"Medium","horse":"Tazaman","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
64d0e9af6b22d46f4e46547848d55ae9a2534234730eee16e019cc6d5a96261f
2
left
b8fa2aad3ef26c48b8e208085f8e7aaae41f384aaeef67d9214ae47592566736
3
left
14e787dcc132b63fa0c8a7f6704e01387ca4d1a840c4e29d1365f7aa2dc44ef1
4
left
850a305a46d1ab56649dfdd2fb90d857a14414ad9958ae3caee6a209c012f1e5
5
left
e03f92d958e5413163b35715e1d7369afc39ca8e31ac016bd7de801fade5670d
6
right
0a5bb34874ff669c5cf989b9de5608e66f456e8a2c0e4549102b83804e867c02
7
right
2cc9e7f1f0b7c3ec0e9bb3fdcf68995f9a6e05667eb83c69c735851531edb0da
8
right
f1c99ba68a2d45d1bb79f40edc8b534afd41f7a23fe00327643be3c20b514374
9
left
c1144f953d5061b1e3ec979350290e5e7106de524b96bf728133a9efff0efd59
10
right
e25c8d2b935f54f140bee5f6c7b02a176294b2ed6153543d94a92504abeba294
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