Zaria (formerly Zazzau) is a metropolitan city in Nigeria, located within four local government areas in Kaduna State. It serves as the capital of the Zazzau Emirate Council and is one of the ori
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 0x0f07cd0e198a2891ba1c6ccf324ba8006fde9533a6a59f1039db38c6d0ea9a59. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/01a8f5d1-7260-4ada-95f6-bfbd4f94676d.json and https://artists.proofprofile.net/proofs/artist/01a8f5d1-7260-4ada-95f6-bfbd4f94676d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).