Karen Margrete Maria "Lulu" Ziegler (18 April 1903 – 14 November 1973) was a Danish actress, singer and theatre director active in Denmark and Sweden. She gained fame as a cabaret singer in the 1930s,
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 0x1ed35f8952199521035a00fb7fb6806a23bb7fe640bcbff4663b6bc3fe72e443. 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/828025f5-386f-4580-b7d0-3a88b4c49a84.json and https://artists.proofprofile.net/proofs/artist/828025f5-386f-4580-b7d0-3a88b4c49a84.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).