Certificate of Pick Authentication #316 · 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: Lushill
Race: Chepstow · 8 July 2026 · 18:26
Product: Top Rated Today (Sly Man) · Top Rated — Top SR Ratings
Advised odds: 11/4
Confidence: High (raw 156)
Prompt version: top_rated_v1_2026-07-08
Predicted at: 2026-07-08T22:13:45.212171+01:00

Cryptographic Seal

Leaf hash: 0c10064c58d2ac1271c845f92790ecfbfc6cdc3f45c82d1216a3084480a8cb9d
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":"ratings_sr","race":{"course":"Chepstow","external_id":"rac_11990251","internal_id":2584,"race_date":"2026-07-08","race_time":"18:26"},"schema":"sr-pick-v1","selection":{"advised_odds":"11/4","confidence_final":"High","confidence_raw":"156","horse":"Lushill","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	0c36997a3289abc0f175c33f4efc6a7e25909ce064dd85541eb5f10828e70a92
2	left	f37f34479201bb1941148727105227efffb625a53cb7acdf07c13f8ab7fabfa4
3	right	8ce71b71ed591cf3fcd0364f59dc59be5873ff18858cb683701b2399d65986bd
4	right	33cef19e7b23cfa5e4c62a7bde0aba90ed9fb27783b52f31f79c56e0c441c3fb
5	right	8f4a0fd246d462fe2734244e69f67fde160b71cf86c07701b68e4e2ede4983a5
6	left	28a79af419252db0d5355ceb206307eccea1dfa0bc74e1b70403c4125df54885
7	right	a1446b8f053c3881b7e667ad2875514c1369218939a0da4c16d065175c0bd80d
8	right	7f26ee208367c64ad8017566de1de4e6ffc26d447963c5f0ab2e3225cec0656b
9	right	a37bae6f6b56af99833b4e131855bb087cd4e3a90918a4dfd59d83ac87f8f303
10	right	e25c8d2b935f54f140bee5f6c7b02a176294b2ed6153543d94a92504abeba294

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