G3, G03, G.III, G.3 or G-3 may refer to: Politics Group of Three, a trio of countries consisting of China, India, and the United States G3 Free Trade Agreement between Colombia, Mexico and Venezuel
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 0xaece93d046246dc9ca03fbd6405c51e034c745ccd5accd3b06934a698ce2af77. Chain 2 (Bitcoin): anchored in block 954500 (2026-06-20T04:47:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9b4df2d5-a61e-45a5-9c83-f6fb40d899b1.json and https://artists.proofprofile.net/proofs/artist/9b4df2d5-a61e-45a5-9c83-f6fb40d899b1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).