Certificate of Pick Authentication #643 · 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: Circus Hill
Race: Sligo · 12 July 2026 · 17:10
Product: Top Rated Today (Sly Man) · Top Rated — Top Signals
Advised odds: 15/8
Confidence: Speculative
Prompt version: top_rated_v1_2026-07-08
Predicted at: 2026-07-12T09:38:16.810765+01:00

Cryptographic Seal

Leaf hash: 157d9f3d52f9de1aa10ef1618d60b471828ff73c813098b9136f0317c9ea878f
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":"2026-07-13T21:10:26Z","issuer":"saturday-racing.com","predicted_at":"2026-07-12T08:38:16Z","product":"top_rated","product_lane":"signals","race":{"course":"Sligo","external_id":"rac_12018552","internal_id":2784,"race_date":"2026-07-12","race_time":"17:10"},"schema":"sr-pick-v1","selection":{"advised_odds":"15/8","confidence_final":"Speculative","confidence_raw":"","horse":"Circus Hill","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	154729d7eea831364f2e3e0652737978958713b6732991b9ec2d25e73a7bb8ef
2	left	cee2dd752e72eda99487dd8a7254c16d379591fe8a04bfc348c782121942699e
3	right	34756aa4c953aa4b581f16683da3adc88832a87e2141b9cec3ed0e2d40ef79c6
4	right	0f583878896b26eb5a38021d5b4a40dab9099d9d5194f70d60a946889f54ac4c
5	right	b40f2a8ff59227eaeeb1227f3171935593453aafb753d3e16182e5c2f0bcab28
6	right	9bf4f078d9681658c6a8e3b6821b776c17a3347c9178f3ba02ba1f2792cfe5c4
7	left	0af567e55c1ca3698f0d247913af3961bd1e207eb3c7b8dd318659719ff7e32e
8	right	7f26ee208367c64ad8017566de1de4e6ffc26d447963c5f0ab2e3225cec0656b
9	right	a37bae6f6b56af99833b4e131855bb087cd4e3a90918a4dfd59d83ac87f8f303
10	right	e25c8d2b935f54f140bee5f6c7b02a176294b2ed6153543d94a92504abeba294

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