Certificate of Pick Authentication #378 · 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 Signals
Advised odds: 22/1
Confidence: Speculative
Prompt version: top_rated_v1_2026-07-08
Predicted at: 2026-07-08T22:13:45.644350+01:00

Cryptographic Seal

Leaf hash: aa6afbe948128d183f1db712572d86444a29ec78bedda2b0eef347b4598b6ead
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":"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":"Speculative","confidence_raw":"","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	aaa898f51dfd6e9b6e2a2235f7e666d5a2b2eaf06832b2606be560d6e55fbcef
2	right	3f090717b9b3c97145f80d7950012f420f49c4cd644228d78c13ac20ac02a4e2
3	right	cac3f37595b72bcceba3cf23544a237166fdc7fbd158d0f6c35f52ec51ebb703
4	right	0bad6b0ab947ca391c272078326ee8ebfa8c798c05d7b6d79201c0488c3baf4c
5	left	144959ae456bbc727f1991fa893d2e1aef3deb58747954bbd3b01a9d5607bb29
6	left	a0db52a97d82a2741b38fc0eeb784af6793ea6882d82b807019bad2067115cb4
7	left	8ecad2493bca745bc0527c62a707de924168e44ffe66dc178ff870ba82aa045e
8	left	9a677d21c2cd9160c97a508996b4307c85b3aa9b95597b3eca8c62f864ebab76
9	left	c1144f953d5061b1e3ec979350290e5e7106de524b96bf728133a9efff0efd59
10	right	e25c8d2b935f54f140bee5f6c7b02a176294b2ed6153543d94a92504abeba294

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