Mustafa Said (مصطفى سعيد) is an Egyptian singer, musicologist, composer and a virtuoso Oud player. He has been living in Beirut since 2004. He has devoted his career to the classical Arabic repertoir
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 0x3f59ebf408d255bcaa90473fad1f07d95cbfd477fd1a9c190a95aa355f2145d7. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a75564c8-449f-44a7-bef0-f14a1118566b.json and https://artists.proofprofile.net/proofs/artist/a75564c8-449f-44a7-bef0-f14a1118566b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).