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
Ferrystream
Race
Windsor · 13 July 2026 · 18:20
Product
Bet of the Day (Sly Man)
Advised odds
10/3
Confidence
MEDIUM (raw 7.52)
Prompt version
v1_f12e6534
Predicted at
2026-07-13T09:47:55.046915+01:00

Cryptographic Seal

Leaf hash
2576268d379062857646ee06cb2099ad1987559d44adfe8798f191e220c47d79
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 22:10:26 BST

Certificate reference

#697

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":"bod_composite","prompt_version":"v1_f12e6534"},"committed_at":"2026-07-13T21:10:26Z","issuer":"saturday-racing.com","predicted_at":"2026-07-13T08:47:55Z","product":"bod","product_lane":"","race":{"course":"Windsor","external_id":"rac_13000001742","internal_id":2808,"race_date":"2026-07-13","race_time":"18:20"},"schema":"sr-pick-v1","selection":{"advised_odds":"10/3","confidence_final":"MEDIUM","confidence_raw":"7.52","horse":"Ferrystream","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 256d4a0755e40704d2eebd7f3d919132e9169d34bd010fee96b4b43c6566925a
2 left 396b218589f1c07e6c8fe86fb8d2f32bc579a9d50c1afc29d016af44f2dcac61
3 left 69a052d8d6ae1f09fb9fa2aae34a96ec76473bcda3d4714137e24bbfb03665c0
4 left 7c9c6dffaa3557a8d30b906bfff1fedf95b4e65e3aa27ccc26628dd6aae2d0f7
5 right efb4763ba2262df820e6316697d4b85fec3f6c4ca1f152c85cfcd1bb91db0efb
6 left d2f5951c321258f1da44d8e3609710b4c9c90fac4d41e3ca7536c70ae340789e
7 left 0af567e55c1ca3698f0d247913af3961bd1e207eb3c7b8dd318659719ff7e32e
8 right 7f26ee208367c64ad8017566de1de4e6ffc26d447963c5f0ab2e3225cec0656b
9 right a37bae6f6b56af99833b4e131855bb087cd4e3a90918a4dfd59d83ac87f8f303
10 right e25c8d2b935f54f140bee5f6c7b02a176294b2ed6153543d94a92504abeba294

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