Brigitte Ahrens (born 13 September 1945 in Chemnitz, Germany) is a German schlager-singer, who was well known in East Germany. Biography Ahrens sang in the choir of the Klub der Jungen Talente in Ka
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 0xf77fa906accb9fc0632ad635b645b99c40266f65b787fe6efa50151758c5c749. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ddd93f45-e105-4913-a769-b171ca0d6815.json and https://artists.proofprofile.net/proofs/artist/ddd93f45-e105-4913-a769-b171ca0d6815.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).