Xanthosis is a yellowish discoloration of degenerating tissues, especially seen in malignant neoplasms. It can be differentiated clinically from jaundice as the sclerae are colored yellow in jaundice,
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 0x1f9c8270f1307c1490655b332e915a7567292c8046c7c669f93b26ce0a4ab9f5. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/23ae3317-9529-4c75-b854-72ccdd7248e5.json and https://artists.proofprofile.net/proofs/artist/23ae3317-9529-4c75-b854-72ccdd7248e5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).