The Nile is a major north-flowing river in northeast Africa which empties into the Mediterranean Sea. At long, it is the longest river in the world, although the volume of water it carries is much sm
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 0x7aec66b779fd095397981f8d7d86b3c952f288c4170b3e4424e1ce1790ecc8b8. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/643d3656-23d3-4d4e-abaf-77a576c66cd9.json and https://artists.proofprofile.net/proofs/artist/643d3656-23d3-4d4e-abaf-77a576c66cd9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).