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
Betteryouthanme
Race
Perth · 2 July 2026 · 15:50
Product
Horses to Watch (Sly Man)
Advised odds
10/3
Confidence
Medium
Prompt version
htw_backfill_v1
Predicted at
2026-07-07T09:56:15.664296+01:00

Cryptographic Seal

Leaf hash
3454de0a02fc891e64b0b80f03cbdc309f11f0ee5266d13a96c51db0c71a66a2
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

#206

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":"Perth","external_id":"rac_11987417","internal_id":2371,"race_date":"2026-07-02","race_time":"15:50"},"schema":"sr-pick-v1","selection":{"advised_odds":"10/3","confidence_final":"Medium","confidence_raw":"","horse":"Betteryouthanme","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 left 3449dfcb08f9628d3d9418f579c0a113072fcd40b091c138e280cc2406a3053f
2 left b3f6c92b74be0784ce9897998db101344c21b43eeddc630d7ec24b98f644f9f5
3 left 71214a599b9268f56bf7d0992728f07afa9cf5e4da7b5b9d06ff134d3dd79f27
4 right 8cfde3b5ad5da2eeb44803ac5baba53b99f6bb037429d739a4a7aecaf7616f39
5 left ec62d24954c0787b59b28928de9f40f093dc023decab6c0c787f2afd9c9fe728
6 right 7b82e1439f3e2ced375831c6c20f3fbb9f5a25088a3ad284db7ae38222b4fb9a
7 right 5f0f7abcd778c76063fcb7f47d37dd69ca800d95c3310c502cc42ed16873af2c
8 left 258ce92dcccd21d1d3bbbb39ac789ad1349e3db2aadbe660b7ed0a8637d8148f
9 right a37bae6f6b56af99833b4e131855bb087cd4e3a90918a4dfd59d83ac87f8f303
10 right e25c8d2b935f54f140bee5f6c7b02a176294b2ed6153543d94a92504abeba294

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