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 Velvet Rhythm
Race Catterick · 8 July 2026 · 16:30
Product Pick Winner (Mr Fox)
Advised odds 2/1
Confidence High
Prompt version v3_b557cbd4
Predicted at 2026-07-08T07:50:09.855600+01:00
Cryptographic Seal
Leaf hash
4f237df87d76f5f9a2bf3f1f1fcc236d67d16b89a8fb54dcf5fe339a440c60c3
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":"2026-07-08T06:50:09Z","product":"pick_winner","product_lane":"","race":{"course":"Catterick","external_id":"rac_11990173","internal_id":2582,"race_date":"2026-07-08","race_time":"16:30"},"schema":"sr-pick-v1","selection":{"advised_odds":"2/1","confidence_final":"High","confidence_raw":"High","horse":"Velvet Rhythm","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
4f3998698a90b32d1079ea696e819d2f3755183f8e428c893e12a64591e93fec
2
left
3cfe9a70da267da0171e254b22e8aece6af555189202cd90351e24518d3d5a18
3
right
af35656e46ae4b81dbe9a6421fdfea587a8b13ee34e64d810c5658a1e253050c
4
left
cb7bb9dce32487a33d813093e6b77ca7a6379c642fa6a08ae820d1dba37a1f07
5
left
6703c0ac8c6ed7fae634608872e9d816e7c3dbf7bca7158e45ab8deab68a82fe
6
right
6eaf7a3b4dbf7de787d708e4aeca0643d7190dfd48ea1d758c6741d5876fc46d
7
left
abd1f2af8516869713aed81c9f26f27b73cfb533f542009e428008b662810a09
8
left
258ce92dcccd21d1d3bbbb39ac789ad1349e3db2aadbe660b7ed0a8637d8148f
9
right
a37bae6f6b56af99833b4e131855bb087cd4e3a90918a4dfd59d83ac87f8f303
10
right
e25c8d2b935f54f140bee5f6c7b02a176294b2ed6153543d94a92504abeba294
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