thumb|Parisian costumes: The dandies of Paris in 1831. A dandy is a man who places particular importance upon physical appearance and personal grooming, refined language and leisurely hobbies. A dand
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 0xa337bd4d5b520d775907e619f70385ef97d94c10e8fd56395966611bf56652cb. Chain 2 (Bitcoin): anchored in block 954569 (2026-06-20T14:36:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b363a548-9dd8-4f1e-a740-29758a73dbe7.json and https://artists.proofprofile.net/proofs/artist/b363a548-9dd8-4f1e-a740-29758a73dbe7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).