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 0x87479d2f578116b3de23c53da512a0b8b0100d9a65ac43a84365d3f21ac6ddc7. Chain 2 (Bitcoin): anchored in block 953954 (2026-06-16T14:18:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/256acfd0-9357-4ba8-a05e-ccf28ea2ee8c.json and https://artists.proofprofile.net/proofs/artist/256acfd0-9357-4ba8-a05e-ccf28ea2ee8c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Jasper (Original Motion Picture Soundtrack)
Ottilie von Faber-Castell - Eine mutige Frau (Original Motion Picture Soundtrack)
Sisters Apart (Original Motion Picture Soundtrack)
Was bleibt (Original Motion Picture Soundtrack)
Hannah Arendt: Facing Tyranny (Original Motion Picture Soundtrack)