Masterdisk is an American multimedia company in New York, located at 8 John Walsh Boulevard in Peekskill. They provide production services such as audio mastering, vinyl cutting and enhanced CD and DV
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 0x9739f9834420dc272b216ffe365d23c537e28a897c5626ead954ed5aab431aa2. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f434254e-947f-451b-a4f9-13ed849d4261.json and https://artists.proofprofile.net/proofs/artist/f434254e-947f-451b-a4f9-13ed849d4261.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).