Certificate of Pick Authentication #346 · 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: Lizzie Twigg
Race: Roscommon · 6 July 2026 · 18:48
Product: Top Rated Today (Sly Man) · Top Rated — Top Signals
Advised odds: 15/8
Confidence: Speculative
Prompt version: top_rated_v1_2026-07-08
Predicted at: 2026-07-08T22:13:45.408820+01:00

Cryptographic Seal

Leaf hash: 87da8b7c90b1357e875cb9664adde8f42e4800f3539e900406e0dc41ca8bc66e
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":"Roscommon","external_id":"rac_12015627","internal_id":2538,"race_date":"2026-07-06","race_time":"18:48"},"schema":"sr-pick-v1","selection":{"advised_odds":"15/8","confidence_final":"Speculative","confidence_raw":"","horse":"Lizzie Twigg","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	88203d1f36ac75a5009ff7dbd5ea01c82b5106ab3b701794fd2d586801fea38b
2	left	6750cdeeb5c627e9d49c11fb4c2b8c69fa3585b3add1a3df4745f4f8d669413e
3	left	c1624a1d3acf8349df2137caf88bf7bf90110edebcca339a0047ec2495bfbf71
4	right	ae9c1dec5c2763c179fcde9d87f5bb1245799e6bac24a46563c59fab0f8ae34d
5	right	eb17e33f2f5cadee3c74fb941d20e5b7162c8357ed519bf251859b425f77bffe
6	right	9cd04c901322f010a3f4b765f8334a04feb06990354fccd9484e7e135228e743
7	right	4c56aa4f1d1039c6ad4821c5c72376f7d1ccb9ab4f942fb7d343352d40712b8c
8	left	9a677d21c2cd9160c97a508996b4307c85b3aa9b95597b3eca8c62f864ebab76
9	left	c1144f953d5061b1e3ec979350290e5e7106de524b96bf728133a9efff0efd59
10	right	e25c8d2b935f54f140bee5f6c7b02a176294b2ed6153543d94a92504abeba294

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