Keza is a ward in Ngara District of the Kagera Region in west-central Tanzania. In 2016 the Tanzania National Bureau of Statistics report there were 10,810 people in the ward, from 9,525 in 2012. Vi
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 0xd5c906fb0a8ddb60642c9c8a13c6bcec7d86a25832ca92a1e2e93d657078ffb5. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d1a5da3e-46b8-4720-a8b6-0672b47f4791.json and https://artists.proofprofile.net/proofs/artist/d1a5da3e-46b8-4720-a8b6-0672b47f4791.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).