Heinz Kruse (29 August 1940 – 29 July 2008) was a German opera singer (tenor). Career Born in Schleswig, Kruse first sang in a children's choir and completed an apprenticeship with a health insuran
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 0x6b786c08fea00dc4d1adf91e33252f21d07d6cf6ddaf15b290885d98c5772dcd. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f287a9c4-2240-486a-a66e-0d7e7f2f2a57.json and https://artists.proofprofile.net/proofs/artist/f287a9c4-2240-486a-a66e-0d7e7f2f2a57.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Zemlinsky: A Florentine Tragedy/Mahler, A. Lieder