Albert Lieven (born Albert Fritz Liévin; 22 June 1906 – 22 December 1971) was a German actor. Early life Lieven was born in Hohenstein, German Empire. His father was the head physician of the Tubercu
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 0x8607dc9b2e0fa207b7e6fd125dc77554918872f95636c6970d33a5e74d5ae36a. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d99ec19c-3374-4317-93db-8466389d56e3.json and https://artists.proofprofile.net/proofs/artist/d99ec19c-3374-4317-93db-8466389d56e3.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.