Certificate of Pick Authentication #403 · 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: Green Sky
Race: Chepstow · 3 July 2026 · 17:10
Product: Top Rated Today (Sly Man) · Top Rated — Top Market Movers
Advised odds: 15/2
Confidence: High (raw 70)
Prompt version: top_rated_v1_2026-07-08
Predicted at: 2026-07-08T22:13:45.869395+01:00

Cryptographic Seal

Leaf hash: 70461a3516792e15870e634c386a122c25ce097dbd2fc890e8e5595278338718
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":"movers","race":{"course":"Chepstow","external_id":"rac_11997284","internal_id":2402,"race_date":"2026-07-03","race_time":"17:10"},"schema":"sr-pick-v1","selection":{"advised_odds":"15/2","confidence_final":"High","confidence_raw":"70","horse":"Green Sky","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	706bac96085bbebf79b2a378c7f3c63ff08795faa74b825f04b875e760e13443
2	right	39f52fc6fa0d075427544029c6e6760a940b21431040bf24d00d3f18424d136a
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/