Ann Pearson is the PVK Professor of Arts and Sciences and Murray and Martha Ross Professor of Environmental Sciences at Harvard University and former chair of the Department of Earth and Planetary Sci
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 0x5a14482940a452d736551a39861bb695c7c19c3b5749c4dda2aeb73fa153acc7. Chain 2 (Bitcoin): anchored in block 954555 (2026-06-20T12:10:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ae9ac983-8026-4c6e-9234-118a93eea3c2.json and https://artists.proofprofile.net/proofs/artist/ae9ac983-8026-4c6e-9234-118a93eea3c2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).