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 0x5294a651765b72ba7675b91110d4a6f14bcb5b35fd878bdaf960a458234af148. 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/17c21d1a-ea16-4e32-8101-fb1fbf2702bc.json and https://artists.proofprofile.net/proofs/artist/17c21d1a-ea16-4e32-8101-fb1fbf2702bc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Frieda - Coming Home (Original Soundtrack)
Mkscoring - 10 Years of Film Soundtracks
Mr Stowlicker / Hiding Places (Original Soundtracks)
Tatort Münster - 20. Jubiläum (Original Motion Picture Soundtrack)
Beyond Earth (Original Motion Picture Soundtrack)
Portrait of Michael Klubertanz (Original Motion Picture Soundtrack)