PG, P.G., P&G, pg, or Pg, or similar, may refer to: Parental Guidance (PG), a content rating in the following motion picture content rating systems and television content rating systems: Australian
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 0x4217a1cc59d099d209a9cc92f5ca050f0db7fc5a7a304600973ae3f9bd1872b8. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/66b8d2d4-b17d-408c-b6bf-27e9e6a05058.json and https://artists.proofprofile.net/proofs/artist/66b8d2d4-b17d-408c-b6bf-27e9e6a05058.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).