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 Lady Kara
Race Stratford · 30 June 2026 · 20:18
Product Horses to Watch (Sly Man)
Advised odds 11/4
Confidence Medium
Prompt version htw_backfill_v1
Predicted at 2026-07-07T09:56:15.568801+01:00
Cryptographic Seal
Leaf hash
da141a874c3798554f04204b24ef9672cda8479192b011bdc660ace647ae2217
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":"Stratford","external_id":"rac_11987235","internal_id":2281,"race_date":"2026-06-30","race_time":"20:18"},"schema":"sr-pick-v1","selection":{"advised_odds":"11/4","confidence_final":"Medium","confidence_raw":"","horse":"Lady Kara","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
da00908944f55a835e936a917ce7b8c637a1585d3200b104783740fbf0ab0c39
2
left
cf2ee629d6dd2c36d181f08d6582c6b55f67d8bb80482d386420d0565127fc9c
3
right
d0bc37047b1c9b8f59489411bf4b6911525bdd5dd735582d1740360357267cb8
4
right
8115ae83ff99564d3058e2f8a1222637a39b8bee4ccb6b8a372292c5a32accb6
5
right
23e4c3a8f31db10095f7234922ef1e6f9c299921f811af33c6f38876c16d12fa
6
left
b495d7542cc68c4b7514051aff9c40ee645b401fdf6a48deafd015554c949f6a
7
left
18098d0ad2005f6c8a767a2aceec92cb16c50e0350a0aeb358818e8c739d9967
8
right
f384b0629d9042022b8062f38497000b02dafa843e81b7fba3c37144f3b49f92
9
right
559310ef76957df08e5f62efc49ff6649a36113b72a52a9a4471bd1801615514
10
left
f294ff8c83ee2bf537f6f3a850e09ef12f44b3915f1df793eb9ebfc3a7648f55
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