1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 artist was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260bdd1f01be305da347b54f643cd4f3bc2ea89d955471de69491fffb12c85aa. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e4fe6cec-88f9-41f3-b6b4-87f7fbe04ca3.json and https://artists.proofprofile.net/proofs/artist/e4fe6cec-88f9-41f3-b6b4-87f7fbe04ca3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Grattacielo (Skyscraper Italian Version)