Damour Vocal Band (Persian: گروه آوازی دامور) is an Iranian A cappella music group co-founded by Faraz Khosravi Danesh and Ata Hakkak in 2011. Background Damour Vocal Band was a successful experie
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 0xca68846730a95c6f749c0c40267d6751cb18584764d2948877661c7e5994656f. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/14e6fd5a-af41-445a-99e4-4080de06de2e.json and https://artists.proofprofile.net/proofs/artist/14e6fd5a-af41-445a-99e4-4080de06de2e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).