thumb|Horn house from the back thumb|Main Gate thumb|Qiu Kailin (left); Qiu Changsheng and madam (center) Horn House () is a Hakka bar-style house located at Mei County, Xiyang, Fuliang village. It i
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 0x399cb01a4b0f2a822cd16e9c3d7da2567b3c730b0e1d1a8bbdc3301db9147b24. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5fe2685a-524b-4c1d-8880-d356984af296.json and https://artists.proofprofile.net/proofs/artist/5fe2685a-524b-4c1d-8880-d356984af296.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).