Certificate of Pick Authentication #655 · 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: League Clash
Race: Stratford · 12 July 2026 · 14:25
Product: Top Rated Today (Sly Man) · Top Rated — Top Market Movers
Advised odds: 10/1
Confidence: High (raw 52)
Prompt version: top_rated_v1_2026-07-08
Predicted at: 2026-07-12T09:38:16.885939+01:00

Cryptographic Seal

Leaf hash: 5ac2cb1da295d10d6aacadb93ff98f789557f7db5fa187908bc4b5c343f41d3b
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":"movers","race":{"course":"Stratford","external_id":"rac_11987950","internal_id":2764,"race_date":"2026-07-12","race_time":"14:25"},"schema":"sr-pick-v1","selection":{"advised_odds":"10/1","confidence_final":"High","confidence_raw":"52","horse":"League Clash","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	right	5af327b626a89de6521bbd15e9cf10bd313bc8411931ab76f083f7eee683104d
2	left	42b6740e23c29ddf254200361d4af8d3075f0c6f54be3a0c85465634811e316e
3	left	70d0afafaec93a3e0779f6969f9bd7f593da9f72187b56d5fee2207e8c5b5a3c
4	left	de42128ab75b05c1180b53296e109b29d46a6c35f5c4a2161f5ae3eaa7ed546c
5	left	9c35144997c1f95839a65dfc94dc3a1139864f7417424a4c114d696b14c74df8
6	left	fc52f76fefc833e1107b03796f834d4ba1336aeb1778053c068d9688bda96b1d
7	left	abd1f2af8516869713aed81c9f26f27b73cfb533f542009e428008b662810a09
8	left	258ce92dcccd21d1d3bbbb39ac789ad1349e3db2aadbe660b7ed0a8637d8148f
9	right	a37bae6f6b56af99833b4e131855bb087cd4e3a90918a4dfd59d83ac87f8f303
10	right	e25c8d2b935f54f140bee5f6c7b02a176294b2ed6153543d94a92504abeba294

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