Certificate of Pick Authentication #386 · 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: Partisan Hero
Race: Sandown · 4 July 2026 · 13:50
Product: Top Rated Today (Sly Man) · Top Rated — Top Market Movers
Advised odds: 22/1
Confidence: High (raw 53)
Prompt version: top_rated_v1_2026-07-08
Predicted at: 2026-07-08T22:13:45.720828+01:00

Cryptographic Seal

Leaf hash: 94a511832f5305f221d91dff8100dd559c43cfb85c0a4b2f06b034a51b0c9087
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":"movers","race":{"course":"Sandown","external_id":"rac_11989419","internal_id":2340,"race_date":"2026-07-04","race_time":"13:50"},"schema":"sr-pick-v1","selection":{"advised_odds":"22/1","confidence_final":"High","confidence_raw":"53","horse":"Partisan Hero","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	94b5ecdf62f26340cb8f64b8bb584a2b1eeb1d0ebe6aafc334b8f14638865bfc
2	right	ebc87738e7455be08ee264e4e7fa4db7a1b3d6dbd41bafbd0f416b991ba3b783
3	left	2b231416bb1128c823ed9fbfe58344c3356854f8fb8072369ac38a6d9d9181cf
4	right	5a048f78e22603bd447f1bb0a0cd4fc6a15466f4f3da16b67aa1766675181b70
5	left	ff396369426df07e2cc9d7219a4648a240b65996a5f7ad862260181ed3b5063a
6	left	de4c18b344759b795e65fd7d556764fb84fe70fe3ed694d8fbe24938047d102e
7	right	4c56aa4f1d1039c6ad4821c5c72376f7d1ccb9ab4f942fb7d343352d40712b8c
8	left	9a677d21c2cd9160c97a508996b4307c85b3aa9b95597b3eca8c62f864ebab76
9	left	c1144f953d5061b1e3ec979350290e5e7106de524b96bf728133a9efff0efd59
10	right	e25c8d2b935f54f140bee5f6c7b02a176294b2ed6153543d94a92504abeba294

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