thumb|Dorodangos made with a variety of clay and different techniques thumb|A large dorodango ( diameter) is a Japanese art form in which soil and water are combined and moulded, then carefully polis
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 0x7d8b33919c8c59f95d55e618c02eba9ff10866bd203a199288bf5d34426b75ef. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c2944a8c-77ea-4d6b-8479-0d681a84beb9.json and https://artists.proofprofile.net/proofs/artist/c2944a8c-77ea-4d6b-8479-0d681a84beb9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).