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 0xc1faec252735951391c891bc2273643d1a286c46584322b5a014bef38ccfc9bc. 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/63aa2ff3-334a-4632-993e-a4b9f7ce54a9.json and https://artists.proofprofile.net/proofs/artist/63aa2ff3-334a-4632-993e-a4b9f7ce54a9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Christensen / Olsen / Danielsen / Holmen: Music for Accordion
The Village Detective: A Song Cycle (Original Motion Picture Soundtrack)