Peter Wieland (stage name of Ralf Sauer; 6 July 1930 – 2 March 2020) was a German singer. Biography The Sauer family left Stralsund following World War II, moving to Köthen. Here, Ralf trained as a
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e49cc27dba5b0212cee89a2c7eeae5229a10cf98dfaddc7b66cd961064326c. 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/84a2aa57-151c-4360-9823-3616db429872.json and https://artists.proofprofile.net/proofs/artist/84a2aa57-151c-4360-9823-3616db429872.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).