Addis Ababa ( ; , ; , ) is the capital and largest city of Ethiopia. It has been the capital of the regional state Oromia under FDRE Constitution Article 49(5). With an estimated population of 2,739
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 0x39999073149652ade26743e182026a35ea0cbeae74759f6de67d3420e21717b3. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/489302ed-d476-4908-aac3-9d33212fc2c2.json and https://artists.proofprofile.net/proofs/artist/489302ed-d476-4908-aac3-9d33212fc2c2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).