1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 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 0x507bc3a502d551e67aaaba7d4ab788cf97c4a74f7d36fac15678c7806f985e89. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cee1f970-3256-40e7-8979-c76fc990f31d.json and https://artists.proofprofile.net/proofs/artist/cee1f970-3256-40e7-8979-c76fc990f31d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Exercise:Exorcise (Guided Improvisations for Voice and Haegeum)