OCG may refer to: Operation Clean Government, a citizens' lobby and advocacy organization in the United States Orchestre de chambre de Genève, a Swiss orchestra City of Granada Orchestra (Orquesta
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2910e2e7fa3c695ac7783f2349e7cc51a989c0f9bb18e757c7ecc689100105. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9736152d-9861-43d3-9b65-3724953349da.json and https://artists.proofprofile.net/proofs/artist/9736152d-9861-43d3-9b65-3724953349da.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).