Pema Choden (born 1965) is a Bhutanese diplomat. Biography Choden studied French and international relations at university, including at the École nationale d'administration in France. She joined B
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 0xc04dc2dd11d35ee2c6f7cb1ef18627a55df4ed17a01ea294158c8a9d2397b17b. Chain 2 (Bitcoin): anchored in block 954013 (2026-06-16T22:27:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/353087f4-dd67-4953-b72e-22c29542a4ff.json and https://artists.proofprofile.net/proofs/artist/353087f4-dd67-4953-b72e-22c29542a4ff.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.