Balduin Baas (9 June 1922 – 22 May 2006) was a German actor. He appeared in more than 70 films and television shows between 1956 and 2002. Partial filmography The Captain from Köpenick (1956) - Ost
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 0x03e1c28bbefdf890439abfb3da5f3a863a171306241ef6ee3cda07bf0a3d679b. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8823adf1-411e-4621-8f02-409ee7e84342.json and https://artists.proofprofile.net/proofs/artist/8823adf1-411e-4621-8f02-409ee7e84342.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).