Certificate of Pick Authentication #408 · 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: Musical Times
Race: Yarmouth · 2 July 2026 · 15:40
Product: Top Rated Today (Sly Man) · Top Rated — Top Signals
Advised odds: 1/6
Confidence: Speculative
Prompt version: top_rated_v1_2026-07-08
Predicted at: 2026-07-08T22:13:45.908192+01:00

Cryptographic Seal

Leaf hash: 825865cff7185236424040186f65491bac4276f0f7142e0dea6a778dd46296b1
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":"2026-07-13T21:10:28Z","issuer":"saturday-racing.com","predicted_at":"2026-07-08T21:13:45Z","product":"top_rated","product_lane":"signals","race":{"course":"Yarmouth","external_id":"rac_11988717","internal_id":2376,"race_date":"2026-07-02","race_time":"15:40"},"schema":"sr-pick-v1","selection":{"advised_odds":"1/6","confidence_final":"Speculative","confidence_raw":"","horse":"Musical Times","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	828d767de9199554356827b40866b3e502a85f7ad8fa3584052d78be6a1375e5
2	left	a703e42e1a75462367204525f32fe8652997a46dd408f6094b5173d4dac74fde
3	left	8fe617fdf95dc3150c7e4d538f9eee04935afbfd3d802cfb096fe05bb1e73359
4	right	e1a58408f4b742fc467a0c54cdb516dc6e0b8fc324cb984a63bcdf9c56ffa73f
5	left	a28a6c373bbfec5b760df86c1f341027d939b8fc52996d217566314b9c0345d5
6	left	55948f4e8e29440793f46045b1f25282558c5bbca3cffc7780c2a3c54ca6d6ec
7	left	b20426c9805bd5f17d7d0c3747a91f6539d868cc80d6de1f3197b66c180d007b
8	right	f1c99ba68a2d45d1bb79f40edc8b534afd41f7a23fe00327643be3c20b514374
9	left	c1144f953d5061b1e3ec979350290e5e7106de524b96bf728133a9efff0efd59
10	right	e25c8d2b935f54f140bee5f6c7b02a176294b2ed6153543d94a92504abeba294

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