1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 artist was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d4f2e61b6d2b1606ee08ce02c806fb02401a81e317d996db587e80c5cf1d95c. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2851b932-da82-4b85-967d-9d770d988349.json and https://artists.proofprofile.net/proofs/artist/2851b932-da82-4b85-967d-9d770d988349.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Clausen & Paulus: Calm on the Listening Ear of Night & Other Choral Works