Certificate of Pick Authentication #343 · 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: Heart Sign
Race: Lingfield (AW) · 6 July 2026 · 14:15
Product: Top Rated Today (Sly Man) · Top Rated — Top Signals
Advised odds: 7/4
Confidence: Speculative
Prompt version: top_rated_v1_2026-07-08
Predicted at: 2026-07-08T22:13:45.388158+01:00

Cryptographic Seal

Leaf hash: 8a41f702e753a1542d880ed2beeb42af2f566724390ced9c134d25925f0c1db6
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":"Lingfield (AW)","external_id":"rac_11991980","internal_id":2514,"race_date":"2026-07-06","race_time":"14:15"},"schema":"sr-pick-v1","selection":{"advised_odds":"7/4","confidence_final":"Speculative","confidence_raw":"","horse":"Heart Sign","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	8a2719c8b2a6ee4adc412f4e0ccc88487801919a3c5513694991a69c26c3400d
2	left	63223ab393e3c60a87bb522e30cff10a1362301502f9c0d31a2845532f7275c7
3	right	90ba3d3224cd74942e3480e89829d3cfdf29c9bb2f1b91d327b0cb51d5cc588f
4	right	d0986b21c8b88d1b93345753607f8d88f454371de7bd1dd950322f7ba0a1fb74
5	left	fd97ad31d6f01aebddc372d49b6d4447ff69649838e727428b09fba1749127fc
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/