Certificate of Pick Authentication #644 · 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 SR Ratings
Advised odds: 15/8
Confidence: High (raw 163)
Prompt version: top_rated_v1_2026-07-08
Predicted at: 2026-07-12T09:38:16.817675+01:00

Cryptographic Seal

Leaf hash: f2b8c65ae86b75272ac0cabfa4b44ca56395fb4233e659376e50426e145bb688
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":"ratings_sr","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":"High","confidence_raw":"163","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	f29323760f61ca9e428d8c969da6c566fb03fa82a1c8a6197b77ddc015bc43b9
2	right	5f1b058a6b6e98d59c7f3e4f2d06d7647ff0744481f41dc54a86ac81741d6f41
3	right	3a6c50065527a58ae0b1c1e5afcbb682a6649b6ee6cfdcbbaa73626868cb7904
4	right	8ca82133a5197a549f9601dba803765dd8378774026008738d758695d87d30bc
5	right	6dc7f9e4c9ff65a1008a569061af1cefad90f7d287f2db80fdfeefb42ac85f48
6	left	0f9b71a99f95ac0b56f346d24cfbb5b52b60e187c7de3d78c741e3c20926b373
7	right	7b91ffdbc0775ceb1efdc9c047cbf134a340783b2dc1627173e9cef778ec1cf8
8	left	5029b4611810c87e9e04fd3af160ed33fa21436626c66ccbd825c959f40bd90c
9	right	559310ef76957df08e5f62efc49ff6649a36113b72a52a9a4471bd1801615514
10	left	f294ff8c83ee2bf537f6f3a850e09ef12f44b3915f1df793eb9ebfc3a7648f55

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