Alwin Georg Kulenkampff-Post (23 January 1898 – 4 October 1948) was a German virtuoso violinist. One of the most popular German concert violinists of the 1930s and 1940s, he was considered one of the
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696ab77c55554235071f04cb0d2d41e4bcc69942cf5c043725a706374f74375a. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/da411dc8-0b54-44b3-baff-8f0babde49f7.json and https://artists.proofprofile.net/proofs/artist/da411dc8-0b54-44b3-baff-8f0babde49f7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Milestones of a Legend - Georg Kulenkampff, Vol. 5 (1941, 1948)
The Great Violin Concertos Recorded in Berlin