thumb| Ann-Helena Schlüter is a German-born Swedish pianist, organist, composer and poet.Ann-Helena Schlüter on pizzicato Life Schlüter was born in Nürnberg and began her piano lessons at the age
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae6603843cfca6ac4606affc88407d49def7f44e7d1b35fa8151c120cea27a1. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/50f7a274-d704-4e70-8d2f-33a52e4a63d2.json and https://artists.proofprofile.net/proofs/artist/50f7a274-d704-4e70-8d2f-33a52e4a63d2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bach: Kunst der Fuge (The Leipzig Concert)