thumb|Vanitas (Latin for vanity) by Léon Bazille Perrault, 1886 Vanity is the excessive belief in one's own abilities or attractiveness compared to others. Prior to the 14th century, it did not have
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 0xb4a335096fa6689964cb62cab430d889b7e67b0911cea1afcdcb8bf5fec9c5a7. Chain 2 (Bitcoin): anchored in block 954014 (2026-06-16T22:46:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/27bebb25-fc97-4db8-8fd9-3e63bae12f2b.json and https://artists.proofprofile.net/proofs/artist/27bebb25-fc97-4db8-8fd9-3e63bae12f2b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).