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 Slack Bob
Race Ayr · 6 July 2026 · 15:30
Product Horses to Watch (Sly Man)
Advised odds 9/2
Confidence Medium
Prompt version htw_backfill_v1
Predicted at 2026-07-07T09:56:15.939681+01:00
Cryptographic Seal
Leaf hash
4b90e7bb3ad8b0170d3ba85f945ab0c382e9377d3b70f9ba5a4fef2c147d3c52
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":"story_score","prompt_version":"htw_backfill_v1"},"committed_at":"2026-07-13T21:10:27Z","issuer":"saturday-racing.com","predicted_at":"2026-07-07T08:56:15Z","product":"horses_to_watch","product_lane":"","race":{"course":"Ayr","external_id":"rac_11989874","internal_id":2509,"race_date":"2026-07-06","race_time":"15:30"},"schema":"sr-pick-v1","selection":{"advised_odds":"9/2","confidence_final":"Medium","confidence_raw":"","horse":"Slack Bob","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
4b88f409a04efa1fe7aacdefd5fc1907b88aca3a31b8da28500b42a2a7d4a719
2
left
1052f1a8099251aafe67617d9690261633e5b1e8e50ffad3b29203c47c4040c7
3
right
79ec48f3b728ab4c7047df070bc9ef1633f77afe3bbfdc48a554c69f2c810082
4
right
0b45a6945f3054295ae99c8158f3a2bb6714e0690539a9dd88e1cfcee1d2b144
5
left
6703c0ac8c6ed7fae634608872e9d816e7c3dbf7bca7158e45ab8deab68a82fe
6
right
6eaf7a3b4dbf7de787d708e4aeca0643d7190dfd48ea1d758c6741d5876fc46d
7
left
abd1f2af8516869713aed81c9f26f27b73cfb533f542009e428008b662810a09
8
left
258ce92dcccd21d1d3bbbb39ac789ad1349e3db2aadbe660b7ed0a8637d8148f
9
right
a37bae6f6b56af99833b4e131855bb087cd4e3a90918a4dfd59d83ac87f8f303
10
right
e25c8d2b935f54f140bee5f6c7b02a176294b2ed6153543d94a92504abeba294
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