Certificate of Pick Authentication #709 · 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: White Ladder
Race: Ayr · 13 July 2026 · 15:00
Product: Top Rated Today (Sly Man) · Top Rated — Top Consensus
Advised odds: 15/8
Confidence: High (raw 4)
Prompt version: top_rated_v1_2026-07-08
Predicted at: 2026-07-13T09:50:10.386440+01:00

Cryptographic Seal

Leaf hash: e77ef0e2a4aa9f4b1c6309620f7dab036e3ffb22e61f58411ccad3e43e9d14cb
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":"2026-07-13T08:50:10Z","product":"top_rated","product_lane":"consensus","race":{"course":"Ayr","external_id":"rac_11999702","internal_id":2787,"race_date":"2026-07-13","race_time":"15:00"},"schema":"sr-pick-v1","selection":{"advised_odds":"15/8","confidence_final":"High","confidence_raw":"4","horse":"White Ladder","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	e82e8df00128f505b24e608664eda6423c24db2a52645e8cff49eb94d800942f
2	right	3512c67c30eac22a1cb0667dca97910b2334b5f21f98885eb7d22bef20be40a5
3	right	2554c8eaa0cc2d073734361c901866d75031ea75c8bac07fa8dd2a9f308ead28
4	left	f4ba71f6e3bd585f070eb3ac852496e12ab993c7f51cf033f7895aad8996046d
5	right	3e35cbb152ebdc46b7a561064613c01e3e78fc967395af21bb7fe503b0a56b43
6	right	da3d768220597c0636847e1f28e766d918af491f20ffa568c070cdc81dea7c6a
7	right	7b91ffdbc0775ceb1efdc9c047cbf134a340783b2dc1627173e9cef778ec1cf8
8	left	5029b4611810c87e9e04fd3af160ed33fa21436626c66ccbd825c959f40bd90c
9	right	559310ef76957df08e5f62efc49ff6649a36113b72a52a9a4471bd1801615514
10	left	f294ff8c83ee2bf537f6f3a850e09ef12f44b3915f1df793eb9ebfc3a7648f55

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