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 0x881f9595d7d970b2b44cf4a4d27283f7f34d4c5cddd2b6775df8c1b4b3dccaa0. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eb7881ad-ab72-42ff-9d9d-f1db6b351afb.json and https://artists.proofprofile.net/proofs/artist/eb7881ad-ab72-42ff-9d9d-f1db6b351afb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).