Silicosis is an occupational lung disease caused by the inhalation of respirable crystalline silica dust. It is characterized by lung inflammation and fibrosis that most commonly affects the upper lob
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 0x126c50b898b21bf7565bf7e5edac61809f1ceb0c3c4ca681aed18891cdd82f48. 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/de584687-988b-427c-96fd-0c8deffa5c1a.json and https://artists.proofprofile.net/proofs/artist/de584687-988b-427c-96fd-0c8deffa5c1a.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.