Onne, also known as Onne-Eleme, is a town in Eleme, Rivers State, Nigeria. The town is a host to one of the two prominent ports in Nigeria. It is bordered by the towns of Alode, Ebubu, and the Ngololo
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 0x03bc0724c653c91c6bd938e8c01f05f8c0ba711761970826d60a1b359dab66f5. 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/02bcee9c-7ac2-4a37-9e28-7de1d199750a.json and https://artists.proofprofile.net/proofs/artist/02bcee9c-7ac2-4a37-9e28-7de1d199750a.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.