Certificate of Pick Authentication #363 · Saturday Racing

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: Brosna Town
Race: Market Rasen · 5 July 2026 · 14:20
Product: Top Rated Today (Sly Man) · Top Rated — Top Signals
Advised odds: 10/3
Confidence: Speculative
Prompt version: top_rated_v1_2026-07-08
Predicted at: 2026-07-08T22:13:45.534559+01:00

Cryptographic Seal

Leaf hash: 052ed545c2cf10feea0e2cc7b75138f88cb4b3e76bf1b983bfbae8f8e0d0e1e6
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":"top_rated_v1_2026-07-08"},"committed_at":"2026-07-13T21:10:27Z","issuer":"saturday-racing.com","predicted_at":"2026-07-08T21:13:45Z","product":"top_rated","product_lane":"signals","race":{"course":"Market Rasen","external_id":"rac_11987534","internal_id":2493,"race_date":"2026-07-05","race_time":"14:20"},"schema":"sr-pick-v1","selection":{"advised_odds":"10/3","confidence_final":"Speculative","confidence_raw":"","horse":"Brosna Town","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.

#	Position	Sibling hash
1	left	052bc64bb93f9e7f862a06035e38991586cf3040a565037697bba7de0c558973
2	right	439d20ced10cc20e4e9b2dee4d8b74576c2407de285f1c53749cafe363100ddc
3	left	cdc55dcdf1aa6a8f3d5e13ce2782e9aa3375ab821634352baa98163ca5e61cca
4	left	296e58954fc87676d3b6c16a18ab9bdd46df991cdffae9426d4135a59f03b085
5	right	ca53ef3fd171e0565048e3b7ef22209c70a4ebf16fd56a95c0461d55050a3323
6	right	176dfb74ea168aed799314f1c1366361f5a82fdfca5ef82a72a3c3a04d0a9176
7	right	a1446b8f053c3881b7e667ad2875514c1369218939a0da4c16d065175c0bd80d
8	right	7f26ee208367c64ad8017566de1de4e6ffc26d447963c5f0ab2e3225cec0656b
9	right	a37bae6f6b56af99833b4e131855bb087cd4e3a90918a4dfd59d83ac87f8f303
10	right	e25c8d2b935f54f140bee5f6c7b02a176294b2ed6153543d94a92504abeba294

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