Katharine McGee is an American author. Her American Royals series was on the New York Times bestseller list in the Young Adults division. Education and career Katharine McGee graduated from Princet
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 0xb69cf59b5b5b065d8ac972e8bf83ddcc707c2e8fdef11fbc21d8303679eb5aab. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a8350b68-80b8-4a8a-bfec-9f220399c36e.json and https://artists.proofprofile.net/proofs/artist/a8350b68-80b8-4a8a-bfec-9f220399c36e.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.