Certificate of Pick Authentication #523 · 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: Mousey Brown
Race: Cork · 10 July 2026 · 20:00
Product: Top Rated Today (Sly Man) · Top Rated — Top Market Movers
Advised odds: 17/2
Confidence: High (raw 57)
Prompt version: top_rated_v1_2026-07-08
Predicted at: 2026-07-10T09:41:59.488306+01:00

Cryptographic Seal

Leaf hash: 774337e90873c5c2b2f735a5d2074ea5ca987edfa870e89708ef9302c7e5e968
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":"2026-07-10T08:41:59Z","product":"top_rated","product_lane":"movers","race":{"course":"Cork","external_id":"rac_12017902","internal_id":2691,"race_date":"2026-07-10","race_time":"20:00"},"schema":"sr-pick-v1","selection":{"advised_odds":"17/2","confidence_final":"High","confidence_raw":"57","horse":"Mousey Brown","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	left	76780f6b7bcfc6583c16096385dbd1ab2a4ee0dc602e173f921bada776ca1d1c
2	right	2ac4e9c8ff82125ffc6e717734b3ed0ef8a061df002e116d5a40db169f3b016e
3	left	fa6b3839eebf0acc6b29d83030ff202c827739fdaca619d6b436e1283426fb47
4	left	fa8d66fb4a16e5a39f9e86f04dd9d89e049a328c3dd225052cf06e1276099ae2
5	left	200f5868f8605f5ad05cb5d5a0f64bb9ef0d04aa83b4e59e3878109d60cf7510
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/