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 entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252f682f2c9c61894b5ee363a4ff0a1d49ddb74bcd9f9d52e5923613f6eab49d. Chain 2 (Bitcoin): anchored in block 954134 (2026-06-17T19:41:05Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7e30c335-df1a-4143-b5ba-0163553e16ab.json and https://artists.proofprofile.net/proofs/artist/7e30c335-df1a-4143-b5ba-0163553e16ab.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Larrainea Zortzikoa (Baztango Zortzikoa)