Certificate of Pick Authentication #645 · 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: Lucky Sevens
Race: Stratford · 12 July 2026 · 13:50
Product: Top Rated Today (Sly Man) · Top Rated — Top SR Ratings
Advised odds: 5/4
Confidence: High (raw 163)
Prompt version: top_rated_v1_2026-07-08
Predicted at: 2026-07-12T09:38:16.825417+01:00

Cryptographic Seal

Leaf hash: 70c282887bb0e7f0c002b01a376524aaddf721cffad18a048145f9169c4ca16b
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":"Stratford","external_id":"rac_11987898","internal_id":2763,"race_date":"2026-07-12","race_time":"13:50"},"schema":"sr-pick-v1","selection":{"advised_odds":"5/4","confidence_final":"High","confidence_raw":"163","horse":"Lucky Sevens","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	71166825aa2db74d11b3fa162a26b25ec8e4c63f7130044b68e2ccf1816f8a5c
2	left	89e7fbf06d435e0bf2d831b0c7796310cf04245251d53c577055a3a1b098acd4
3	left	0da56331b800ef73131d70027fe068a565a5ac6f9a354a57dce691aeb46f4e2e
4	right	09181a3b616be26fd777ab06f7478c4d61af8911e4c1da467d5c39f85d7f8eba
5	right	c362f8f13d29a49f9fc723913698178dc30b6ecc7c385c0482b3e28c896819f8
6	right	11a3ade288925daffe08c7c49239d533eac4edd4330aa411ec5a586d3ef88887
7	left	b20426c9805bd5f17d7d0c3747a91f6539d868cc80d6de1f3197b66c180d007b
8	right	f1c99ba68a2d45d1bb79f40edc8b534afd41f7a23fe00327643be3c20b514374
9	left	c1144f953d5061b1e3ec979350290e5e7106de524b96bf728133a9efff0efd59
10	right	e25c8d2b935f54f140bee5f6c7b02a176294b2ed6153543d94a92504abeba294

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