thumb|Lobsters awaiting purchase in Trenton, Maine Lobsters are malacostracan decapod crustaceans of the family Nephropidae or its synonym Homaridae. They have long bodies with muscular tails and liv
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 0x2697b85323fdbabdf214720de3f44877eaf5abc5f544011d4ad54ab86ae03c32. Chain 2 (Bitcoin): anchored in block 954062 (2026-06-17T07:39:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4613f678-21c1-41fe-a685-aaefb9eca205.json and https://artists.proofprofile.net/proofs/artist/4613f678-21c1-41fe-a685-aaefb9eca205.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).