Certificate of Pick Authentication #344 · 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: Perfect Nation
Race: Lingfield (AW) · 6 July 2026 · 14:45
Product: Top Rated Today (Sly Man) · Top Rated — Top Signals
Advised odds: 8/11
Confidence: Speculative
Prompt version: top_rated_v1_2026-07-08
Predicted at: 2026-07-08T22:13:45.395366+01:00

Cryptographic Seal

Leaf hash: 4806698088e5d16dba60ecdd6079cbe2f5d04074ec95d67db3ef31290dfe9e4f
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":"Lingfield (AW)","external_id":"rac_11991928","internal_id":2515,"race_date":"2026-07-06","race_time":"14:45"},"schema":"sr-pick-v1","selection":{"advised_odds":"8/11","confidence_final":"Speculative","confidence_raw":"","horse":"Perfect Nation","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	4877c0978204fa1204d4ca2748f1b193b7b34b0d61fe39c0c71b325f83569034
2	left	92202bde64101f7fe19fa147566817413cf0c150d01c5fae6d5b0dbee6a68a55
3	left	8f73b9e65c5b6da8af95b2613dd50fc66dc030841db33a4886f932a854bc3484
4	right	e2b7f806ad9a6eba5df0c3eea8f068305d20f2fc50dc409c583ba80dca42441f
5	right	1a7c6b029f58cae1bf8086ed6fa83e42a03e521eed5dfafe556fe3f16191d19b
6	right	6eaf7a3b4dbf7de787d708e4aeca0643d7190dfd48ea1d758c6741d5876fc46d
7	left	abd1f2af8516869713aed81c9f26f27b73cfb533f542009e428008b662810a09
8	left	258ce92dcccd21d1d3bbbb39ac789ad1349e3db2aadbe660b7ed0a8637d8148f
9	right	a37bae6f6b56af99833b4e131855bb087cd4e3a90918a4dfd59d83ac87f8f303
10	right	e25c8d2b935f54f140bee5f6c7b02a176294b2ed6153543d94a92504abeba294

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