Karim Nagi is an Egyptian musician, composer, ethnic dance artist, and DJ. He specializes in traditional Arabic music but is widely known for his innovative approach. In total he has released fourteen
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 0xb56fdbe8ec7f88fbe104b48f60aaef6b2b4441c771aeaf6082f5cdf85c53b70b. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ee8a75f9-c32e-4d6d-9945-37d3a520d95e.json and https://artists.proofprofile.net/proofs/artist/ee8a75f9-c32e-4d6d-9945-37d3a520d95e.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.