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 0x96932fffcc8178c6816d645c72469180f2078b7ef27deb10ee77c2a67bb9ac72. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5d894cb6-246a-46c3-a778-1758f22b294b.json and https://artists.proofprofile.net/proofs/artist/5d894cb6-246a-46c3-a778-1758f22b294b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Roland Baumgartner: Symphonia Globalis (Linzer Klangwolke 1996)
Roland Baumgartner: Missa Pacis (Linzer Klangwolke 1995)
Sisi - Die Seele einer Kaiserin (From the Vienna Ronacher Theatre)
When We Get Home Again (Original Motion Picture Soundtrack)
The Sky Above Us (Violin Concerto No. 1)
Notre Dame De Paris (Piano Concerto No. 1)