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 0xfe4776428d76acd4a5e237b134b1524fb53d0c3c647d8cfbe45e7d6b522cd84a. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c15a96a6-d655-433b-ace9-ca86bb1daf2b.json and https://artists.proofprofile.net/proofs/artist/c15a96a6-d655-433b-ace9-ca86bb1daf2b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ode To The Dawn: Zheng Tunes By Zhou Taotao (Chen Zhi Ge: Zhou Taotao Gu Zheng Du Zou Ji)