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 0xc5bfd01c408c74693de1eb55fe2db6e9708b12e9f23dd2da7edef1a97f05cafa. Chain 2 (Bitcoin): anchored in block 954556 (2026-06-20T12:14:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/add3cffb-2e0b-48f0-9b5c-24ede217236c.json and https://artists.proofprofile.net/proofs/artist/add3cffb-2e0b-48f0-9b5c-24ede217236c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).