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 0x586b2a67b5a8d8456b075cc421f4969362829ea73e3357e3129bb90887f4edd5. Chain 2 (Bitcoin): anchored in block 953636 (2026-06-14T13:03:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3666bc67-c355-4e6f-8599-f3ac0916127e.json and https://artists.proofprofile.net/proofs/artist/3666bc67-c355-4e6f-8599-f3ac0916127e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).