Claude most commonly refers to: Claude (language model), a family of large language models developed by Anthropic Claude Lorrain (c. 1600–1682), French landscape painter, draughtsman and etcher trad
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 0xa2c01c0ef485a0ee9944885ae51107d38bf4eaa76eff3a5cf36a9654ecb4d6ef. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a3fc72bc-d044-4726-9ec6-f37b3e6187af.json and https://artists.proofprofile.net/proofs/artist/a3fc72bc-d044-4726-9ec6-f37b3e6187af.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).