Gondar, also spelled Gonder (Amharic: ጎንደር, Gonder or Gondär; formerly , Gʷandar or Gʷender), is a city and woreda in Ethiopia. Located in the North Gondar Zone of the Amhara Region, Gondar is north o
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 0xa3fe3da620bcaf46c865d05ef941afbde96c4840f4e27e2e7765d66d68cbe18f. 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/d211ea4f-8d58-4ecb-afb9-f1e2dc0f9ba2.json and https://artists.proofprofile.net/proofs/artist/d211ea4f-8d58-4ecb-afb9-f1e2dc0f9ba2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).