thumb|A "colossal octopus" attacking ship, pen and wash by Pierre Denys-Montfort, engraved by Étienne Claude Voysard, 1801, . thumb|Kraken, an unconfirmed cephalopod. Engraving by W. H. Lizars, in Ha
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe44d39ece0e5062902e8131716b48af975b7bbddb55edcfef8e3b00deb05258. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e125fce9-a565-448a-b579-c3ae143d5558.json and https://artists.proofprofile.net/proofs/artist/e125fce9-a565-448a-b579-c3ae143d5558.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).