Saturday Racing · The Transparency Ledger

Certificate of Pick Authentication

Issued under schema SR-PICK-V1

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
Rebel Moon
Race
Naas · 24 June 2026 · 18:40
Product
Horses to Watch (Sly Man)
Advised odds
4/1
Confidence
Medium
Prompt version
htw_backfill_v1
Predicted at
2026-07-07T09:56:15.173240+01:00

Cryptographic Seal

Leaf hash
5294ab778e399e7d0e3a9ccefe92d46badd343f104ae8c0df121f7674f0deedd
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.

Signed

Saturday Racing Editorial Ledger

Committed 13 July 2026 at 22:10:28 BST

Certificate reference

#168

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":"Naas","external_id":"rac_12004980","internal_id":2057,"race_date":"2026-06-24","race_time":"18:40"},"schema":"sr-pick-v1","selection":{"advised_odds":"4/1","confidence_final":"Medium","confidence_raw":"","horse":"Rebel Moon","position_claim":"win"}}

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.

#PositionSibling hash
1 right 5296fe79142746d79b7389fbc6d63dcc3847adc4f9e27df87bc7be2996dc6fea
2 left e4b19b4e9319058d4abab35d7536bad3fcd25f4413e5c2544a079656f33961e1
3 right c3658028465abd4e247a5b649c025a9305e8d896e21720a895b93f07f346de0a
4 right e7fad4010f0684750d1619edc79e768e7ad13ddfb734e7cbdf18b8837e8c4367
5 right 8482e981bcd79800d8fe2d1ac2fc4e783eb3f5a068d13e0f7b209a25cf2a3317
6 left fc52f76fefc833e1107b03796f834d4ba1336aeb1778053c068d9688bda96b1d
7 left abd1f2af8516869713aed81c9f26f27b73cfb533f542009e428008b662810a09
8 left 258ce92dcccd21d1d3bbbb39ac789ad1349e3db2aadbe660b7ed0a8637d8148f
9 right a37bae6f6b56af99833b4e131855bb087cd4e3a90918a4dfd59d83ac87f8f303
10 right e25c8d2b935f54f140bee5f6c7b02a176294b2ed6153543d94a92504abeba294

Server-reported status: off_chain_verified · Ledger overview at /verify/