thumb|Weiss in 2009 Harald Weiss (surname also spelled Weiß; born 26 May 1949) is a German composer, director, screenwriter and free-lance artist. Biography Weiss was born in Salzgitter. His composit
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 0x103741928c7a18b2fad6e35af925dc284405e3597177f65adf7ee14cc97932a8. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/333ca9bf-9bdd-4903-8a1e-f377e10bf5af.json and https://artists.proofprofile.net/proofs/artist/333ca9bf-9bdd-4903-8a1e-f377e10bf5af.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Harald Weiss: Requiem (Schwarz vor Augen und es ward Licht!)
Bremer Requiem (with Björn Kadenbach & Renate Meyhöfer-Bratschke)