Qahtan Salih Mahdi al-Kinani better known by his artistic name as Qahtan al-Attar (; born September 14, 1950) is an Iraqi singer, songwriter, musician. He is known as el-Andaleeb el-Muhajer (). Earl
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 0x60bf18a8ab3cef06cf9e89371fa5d20f10d747e371d92996f2da1c8706121be5. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4693803b-16dc-4782-ae83-8366a63261e9.json and https://artists.proofprofile.net/proofs/artist/4693803b-16dc-4782-ae83-8366a63261e9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9fb3ab38a9517fc7d1b1b0a549587b1beb69cf166461befb35e335ba2c9c9c. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:32:53Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TW1787018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf625c94664442e257074340c6cfc2ef813452505336f2c86aad2381f2cbc2651. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TW1787019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c8dfa1b8073d8d5bc0c0b53ce2e3add39ab3afac2dc942ab84b20f0de568ec. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:22:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TW1787037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053a3c18f97e554a3258afe687d709d814ebd21ee84418731e524da8ed690d6c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TW1787024.