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 Merveilleux Lapin
Race Pontefract · 21 June 2026 · 15:05
Product Horses to Watch (Sly Man)
Advised odds 11/1
Confidence Medium
Prompt version htw_backfill_v1
Predicted at 2026-07-07T09:56:15.006017+01:00
Cryptographic Seal
Leaf hash
4f012d2e574bf9791a2e7a4987697b614bd30e3077fa5012673d7e235b323910
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":"2026-07-13T21:10:28Z","issuer":"saturday-racing.com","predicted_at":"2026-07-07T08:56:15Z","product":"horses_to_watch","product_lane":"","race":{"course":"Pontefract","external_id":"rac_11976016","internal_id":1948,"race_date":"2026-06-21","race_time":"15:05"},"schema":"sr-pick-v1","selection":{"advised_odds":"11/1","confidence_final":"Medium","confidence_raw":"","horse":"Merveilleux Lapin","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
4ea2689a1493564cc7fc71bdd881005a1e24b978a4e808f244c6f4429db6089c
2
right
6d65eb780be1f4b73feba4abea4bc3315322fb0813d0bc47891b92408a9dbb49
3
right
af35656e46ae4b81dbe9a6421fdfea587a8b13ee34e64d810c5658a1e253050c
4
left
cb7bb9dce32487a33d813093e6b77ca7a6379c642fa6a08ae820d1dba37a1f07
5
left
6703c0ac8c6ed7fae634608872e9d816e7c3dbf7bca7158e45ab8deab68a82fe
6
right
6eaf7a3b4dbf7de787d708e4aeca0643d7190dfd48ea1d758c6741d5876fc46d
7
left
abd1f2af8516869713aed81c9f26f27b73cfb533f542009e428008b662810a09
8
left
258ce92dcccd21d1d3bbbb39ac789ad1349e3db2aadbe660b7ed0a8637d8148f
9
right
a37bae6f6b56af99833b4e131855bb087cd4e3a90918a4dfd59d83ac87f8f303
10
right
e25c8d2b935f54f140bee5f6c7b02a176294b2ed6153543d94a92504abeba294
Print / save this certificate