thumb|right|300px|Otterlo Meeting 1959 (also CIAM '59), organized by Team 10, 43 participants. Meeting place: Kröller-Müller Museum, located in the Hoge Veluwe National Park. Dissolution of the organi
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 0xe9412d82d55152fe6d1c4f77db30c32aff0186a8ec9ed30cab84daa42be44fc7. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb2bd9f0-db52-4367-9d65-fdb4e95245cc.json and https://artists.proofprofile.net/proofs/artist/cb2bd9f0-db52-4367-9d65-fdb4e95245cc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).