CDG may refer to: People Charles de Gaulle (CdG; 1890–1970), French general and President Places Charles de Gaulle Airport (CdG; IATA code ), Paris, France Chandigarh railway station (station cod
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 0xdab133d92832f5c4e2b9b6fabafc667b29a2e0de595c4439c8cf9a9ca033ba37. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/00cb6b1e-c957-4fec-ad26-ae2131f6bbc6.json and https://artists.proofprofile.net/proofs/artist/00cb6b1e-c957-4fec-ad26-ae2131f6bbc6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).