Navy blue is a dark shade of the color blue. The name navy blue originally referred to the color of uniforms worn by officers in the British navy. In the late 18th century, the British Royal Navy adop
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 0xb920747d63d14f376d311680073c1af4f87420d4db1407e8926d7c95d0a501b3. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e2cb450a-47b5-432a-9de8-2c1d0ec75bae.json and https://artists.proofprofile.net/proofs/artist/e2cb450a-47b5-432a-9de8-2c1d0ec75bae.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.