thumb|Lehmann in Beethoven's Fidelio Charlotte "Lotte" Pauline Sophie Lehmann (February 27, 1888 – August 26, 1976) was a German-American dramatic soprano noted for her successful performances with i
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 0x26a97a4e0326928398d6ad488d7efd5341d15dac009d24e62c57a191f33eab03. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a1e32f68-2c40-4fab-bd76-0bc5f709ec6e.json and https://artists.proofprofile.net/proofs/artist/a1e32f68-2c40-4fab-bd76-0bc5f709ec6e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Beethoven, Schubert & Others: Vocal Works
Schubert, Schumann, Wagner & Others: Art Songs (Live)
Singers of the Century: Lotte Lehmann Sings Light Music (Remastered 2017)
Lotte Lehmann – A 125th Birthday Tribute (Live)
Great Opera Singers / Soprano Arias / 1935 - 1949
Classic German Poetry by Goethe, Mörilke, Heine
Lehmann, Lotte: Lieder Recordings, Vol. 6 (1947, 1949)
Lehmann, Lotte: Lieder Recordings, Vol. 4 (1941)
Lehmann, Lotte: Lieder Recordings, Vol. 3 (1941)
Lehmann, Lotte: Lieder Recordings, Vol. 2 (1937-1940)
Lehmann, Lotte: Lieder Recordings, Vol. 1 (1935-1937)
Strauss, R.: Rosenkavalier (Der) (Lehmann, Schumann) (1933)
Wagner: Premier acte de La Walkyrie (Mono Version)
Lotte Lehmann chante Brahms, Franz, Mozart, Schubert, Schumann (Mono Version)
Schumann: Les amours du poète, Op. 48 (Mono Version)
Schumann: Frauenliebe und Leben, Op. 42 & Dichterliebe, Op. 48
Schumann: Dichterliebe, Op. 48 / Frauenliebe und leben, Op. 42