thumb|Portrait of Jill Crossland Jill Crossland is an English pianist, born in Yorkshire. She studied with Ryszard Bakst (a Heinrich Neuhaus pupil) at Chetham's School of Music and the Royal Northern
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048bb65cf9a4b6425de2e199bcff195d659654945b65988bccb9f13cae112197. Chain 2 (Bitcoin): anchored in block 954729 (2026-06-21T18:16:07Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fb87b004-211a-4b59-862d-e25075322a66.json and https://artists.proofprofile.net/proofs/artist/fb87b004-211a-4b59-862d-e25075322a66.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Jill Crossland plays Mozart and Beethoven
Jill Crossland plays Mozart, Beethoven & Busoni