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 0xb2c4633f0f952b0b7ab00440a3e3f09736c9529a0df6c4b4e90c2f722b9c30ce. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4ffe81b6-ee9e-4dea-a221-f18ee834def5.json and https://artists.proofprofile.net/proofs/artist/4ffe81b6-ee9e-4dea-a221-f18ee834def5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Music from Drinking Buddies, a film by Joe Swanberg