G6, G.VI, G.6 or G-6 may refer to: International politics G6 (EU), the six largest European Union members Group of Six, a 1975 international summit which led to the G7 and G8 44th G7 summit, ref
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 0x0fa61b8b5cc13d09c86d0ff0c59f0dc44349ae1b358fb9afdfb3941b1950cbef. Chain 2 (Bitcoin): anchored in block 954638 (2026-06-21T03:45:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d5927373-9d1d-43a7-b9dd-f9c8a7c054e6.json and https://artists.proofprofile.net/proofs/artist/d5927373-9d1d-43a7-b9dd-f9c8a7c054e6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).