Ilse Hollweg (23 February 1922 – 9 February 1990) was a German operatic coloratura soprano. A member of the Deutsche Oper am Rhein, she appeared at major European opera houses and festivals including
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 0xce63dbf7011f0af030066fbc3376976838bee627ce1a984c2cb6e68280d1a98f. 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/80621994-525d-4f62-91e7-89458fe472c9.json and https://artists.proofprofile.net/proofs/artist/80621994-525d-4f62-91e7-89458fe472c9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).