Certificate of Pick Authentication #401 · 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: Miss Kassiopi
Race: Newton Abbot · 3 July 2026 · 15:20
Product: Top Rated Today (Sly Man) · Top Rated — Top Consensus
Advised odds: 1/2
Confidence: High (raw 4)
Prompt version: top_rated_v1_2026-07-08
Predicted at: 2026-07-08T22:13:45.853105+01:00

Cryptographic Seal

Leaf hash: 60d4962f9303bf098c8347136a711c34d78bf6123ad97284f5888bc512e7afe5
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":"consensus","race":{"course":"Newton Abbot","external_id":"rac_11987495","internal_id":2417,"race_date":"2026-07-03","race_time":"15:20"},"schema":"sr-pick-v1","selection":{"advised_odds":"1/2","confidence_final":"High","confidence_raw":"4","horse":"Miss Kassiopi","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	61730396762e93c0d9e5b3082ac8451ea1a36d3c4aaa6fcdcb7ba17a274da508
2	left	879c528dda7ecfe39c956409081f11d2b017051dfda7024edcf83572cb268dd3
3	left	2b7acd87bdf1115c3946e6ed185b0f7e1b9677eb2c1288d485cf43924abcdbe0
4	right	f9371f3fa48bca141479c323ccf5b20a62210cc43be2b113d347d57b29a8844a
5	left	e03f92d958e5413163b35715e1d7369afc39ca8e31ac016bd7de801fade5670d
6	right	0a5bb34874ff669c5cf989b9de5608e66f456e8a2c0e4549102b83804e867c02
7	right	2cc9e7f1f0b7c3ec0e9bb3fdcf68995f9a6e05667eb83c69c735851531edb0da
8	right	f1c99ba68a2d45d1bb79f40edc8b534afd41f7a23fe00327643be3c20b514374
9	left	c1144f953d5061b1e3ec979350290e5e7106de524b96bf728133a9efff0efd59
10	right	e25c8d2b935f54f140bee5f6c7b02a176294b2ed6153543d94a92504abeba294

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