Dorji Wangchuk (born 1967) is a Bhutanese-German professor for Tibetan (Buddhist) Studies at the Department of Indian and Tibetan Studies in the University of Hamburg's Asien-Afrika-Institute and is
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 0xa16cd1583a2c6ce1835e55df07112f67188587f1d7c8df2a0d3ce7847d3967ac. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a4e22919-b5cb-40dd-ad4d-d828c1d08bb0.json and https://artists.proofprofile.net/proofs/artist/a4e22919-b5cb-40dd-ad4d-d828c1d08bb0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).