thumb|Sebastian Bohren 2014 during a rehearsal at the KKL Lucerne Sebastian Bohren (born 1987 in Winterthur) is a Swiss violinist. Life Sebastian Bohren pursued lessons under Jens Lohmann, followed
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 0x9f03f9abb66def156e325a609af91af5a6073cfda4404f97a3dcaaffbd0808d0. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/03edd084-57aa-4113-bde0-2a3d2fd3f2d8.json and https://artists.proofprofile.net/proofs/artist/03edd084-57aa-4113-bde0-2a3d2fd3f2d8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Equal - Beethoven: Violin Concerto, Op. 61 - Schumann: Fantasia, Op. 131 - Françaix: Nonetto
Op. 2 - Hartmann, Mendelssohn, Respighi, Schubert
Distant Light - Vasks: Vox Amoris, Distant Light & Kancheli: Chiaroscuro