CGO may refer to: Carlson, Gaskey & Olds: an intellectual property firm based in Birmingham, Michigan Catalogue of Galactic O Stars, an astronomical catalogue Central Gilts Office Ceria gadolinium oxi
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 0x1840cfe40a21fed711295b2420a4dc85855ae3ff84caf3a8dda89e9a1b8a19c8. Chain 2 (Bitcoin): anchored in block 954513 (2026-06-20T06:31:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9ce225c4-4d44-4f31-b2a9-16fc158d23eb.json and https://artists.proofprofile.net/proofs/artist/9ce225c4-4d44-4f31-b2a9-16fc158d23eb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).