thumb|A Muzak van in Indianapolis, Indiana Muzak is an American brand of background music played in retail stores and other public establishments owned by Mood Media. The name Muzak, a blend of music
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 0x193afa81fa84db9801651e074dda4e1411ec46ec5a1b00e2b1a54b4293d80662. Chain 2 (Bitcoin): anchored in block 954131 (2026-06-17T19:19:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7d8c25cd-f6a2-4ce5-b58c-1b72e4bd522c.json and https://artists.proofprofile.net/proofs/artist/7d8c25cd-f6a2-4ce5-b58c-1b72e4bd522c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).