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 Alice
Race Stratford · 29 June 2026 · 15:40
Product Horses to Watch (Sly Man)
Advised odds 5/2
Confidence Medium
Prompt version htw_backfill_v1
Predicted at 2026-07-07T09:56:15.455799+01:00
Cryptographic Seal
Leaf hash
b2c2d689f8373275b8cdc4f31acbc35bfee0405cacd64331715b700d38ee31c0
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_11987183","internal_id":2241,"race_date":"2026-06-29","race_time":"15:40"},"schema":"sr-pick-v1","selection":{"advised_odds":"5/2","confidence_final":"Medium","confidence_raw":"","horse":"Slack Alice","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
b24c04af0da743fe14d90e2d5d35d2e6c350845107048c011bdbfd4599d51e2b
2
right
0211d5f773408a5f10023ac70c45e40220c4b40296961080d23cebea3203c4c3
3
right
42dfd9cb472accf99945c4c02976a78f6dc92ea67d17012d950270bd76435976
4
right
f8c4bc101105bfaa39b7c59eacdd5fb08c4c3413ac394497650689391b07de2d
5
right
cdc43ee135d27ed2e4e2e9c87e3d3d2a18ea09ac1b149404ecdd52998e761386
6
right
204feec8495b2d1b806e60958c15c429141021ee238922bdfcbd4c87367079be
7
right
7b966ba7fb6479ee18f2a8f9b8925b3c3366b9fe81cdbeb08938a02c83890686
8
right
f384b0629d9042022b8062f38497000b02dafa843e81b7fba3c37144f3b49f92
9
right
559310ef76957df08e5f62efc49ff6649a36113b72a52a9a4471bd1801615514
10
left
f294ff8c83ee2bf537f6f3a850e09ef12f44b3915f1df793eb9ebfc3a7648f55
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