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 0x450399cf126667db9727b31fdaca2e32b6f58694ffc716ab8d060099220f7253. Chain 2 (Bitcoin): anchored in block 954569 (2026-06-20T14:36:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b09b6a62-312d-4496-b841-7b506e576c27.json and https://artists.proofprofile.net/proofs/artist/b09b6a62-312d-4496-b841-7b506e576c27.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Winner Takes It All (Original Theater Soundtrack)
Hotel Rock Bottom (Original Theater Soundtrack)
Tigist (Original Documentary Soundtrack)
What a Time To Be Alive (Original Theater Soundtrack)
Storm voor wie wakker is (Original Theater Soundtrack)
Op Een Onbewoond (Original Theater Soundtrack)
Superposition (Original Theater Soundtrack)
Heartcore Kantoor (Original Theater Soundtrack)
Veerkracht (Original Documentary Soundtrack)