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genre: tango
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  track: Schreib' mir mal 'ne Karte
  track: Zwei in einer grossen Stadt: Zwei in einer grossen Stadt
  track: Es gibt nur ein Berlin
  track: Lieber Leierkastenmann
  track: Jetzt geht's der Dolly gut
  track: Wir tanzen um die Welt: Einmal wirst du wieder bei mir sein
album: The Roaring Twenties (Die wilden Zwanziger), Vol. 3: Das macht Baby alles nur aus Liebe
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album: Glamourwelt Berlin Vol. 5 (1926-1942) From the "Weimarer Republik" to the Second World War - The songs of old Berlin
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  date published: 2013-01-29
album: In Holly Holly Hollywood
  type: MusicAlbum
  date published: 2016-11-25
album: Swing-Sinfonie: Willi Stech und das Tanzorchester des Deutschlandsenders, Das Deutsche Tanz- und Unterhaltungsorchester (Recordings 1942/43)
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      date published: 2026-07-08T03:20:19Z
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      date published: 2026-07-08T08:56:20Z
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  track: Hörst Du das Meer?
album: Internationales Salonmusik Festival Interlaken 1994
album: The Golden Era of the German Dance Orchestra: Barnabas von Geczy mit seinem Orchester, Vol. 1 (1935-1940)
album: History of German film music, Vol. 5: We Dance Around the World (1938-1940)
album: Rene Kollo, Vol. 3: Lieblingsmelodien (1968-1984)
album: Ich sing mein schonstes Lied
album: Evergreens
album: The Golden Era of the German Dance Orchestra: Adolf Steimel, Organum Tanzorchester und andere Formationen (1939-1943)
album: Wie einst im Mai
album: Wie einst im Mai [Musikalische Gesamtaufnahme]
album: Polskie Tango 1929 - 1939
album: Auf den Spuren meiner Väter · René Kollo singt Kollo
album: That Blue Hour (Remastered 2022)
album: Wenn der Vater mit dem Sohne... (Unsterbliche Evergreens von Walter und Willi Kollo)
album: Erfolge, Sammlerstücke & Raritäten - Historische Aufnahmen (Folge 4)
album: Kabarett der Weimarer Republik: Max Hansen – "War'n Sie schon mal in mich verliebt?" (Cabaret of the Weimar Republic) [Recorded 1927-1934]
album: Die Goldene Ära deutscher Tanzorchester: Das Eric Harden Tanzorchester (Recordings 1931-1937)
album: Die Goldene Ara Deutscher Vokalensembles (Recorded 1931-1941)
album: Heimweh Nach Berlin Vol. 1
album: Icons of German Cinema: Frau Meiner Träume – Marika Rökk (Remastered 2017)
album: Historische Aufnahmen, Vol. 4 (Deutsche Klassiker 1940-1961)
album: Hermann Prey
album: Operetten-Schlager, Vol. 5
album: The Richard Tauber Collection, Vol. 23: Popular German Songs, Vol. 2 (Recorded 1928-1933)
album: Operetten Schätze, Vol. 15

Schreib' mir mal 'ne Karte
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  date published: 2026-07-06T06:56:49Z
audio: Schreib' mir mal 'ne Karte
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Zwei in einer grossen Stadt: Zwei in einer grossen Stadt
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  date published: 2026-07-08T03:20:19Z
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Es gibt nur ein Berlin
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Lieber Leierkastenmann
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  date published: 2013-07-02
popularity: 1
genre: vintage-schlager
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T18:48:12Z
audio: Lieber Leierkastenmann
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp 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

Jetzt geht's der Dolly gut
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duration: PT2M39S
duration ms: 159541
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by artist: Max Hansen
by artist: Paul Godwin Orchestra
by artist: Paul Godwin
in album: Es gibt nur ein Berlin … Die Lieder von Willi Kollo in Originalaufnahmen (1927-1946)
  type: MusicAlbum
  date published: 2013-07-02
popularity: 2
genre: vintage-schlager
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T10:20:10Z
audio: Jetzt geht's der Dolly gut
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp 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

Wir tanzen um die Welt: Einmal wirst du wieder bei mir sein
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duration: PT3M0S
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explicit: false
by artist: Willi Kollo
by artist: Rudi Schuricke
by artist: Adolf Steimel Orchestra
by artist: Adolf Steimel
in album: Es gibt nur ein Berlin … Die Lieder von Willi Kollo in Originalaufnahmen (1927-1946)
  type: MusicAlbum
  date published: 2013-07-02
popularity: 7
genre: vintage-schlager
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-29T11:07:37Z
audio: Wir tanzen um die Welt: Einmal wirst du wieder bei mir sein
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp 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

Das ist der Fruhling von Berlin
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duration: PT2M15S
duration ms: 135000
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by artist: Walter Kollo
by artist: Willi Kollo
by artist: Hermann Prey
by artist: Wannsee-Sanger
by artist: Cologne Radio Orchestra
by artist: Heinz Geese
in album: Ich sing mein schonstes Lied
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popularity: 14
genre: operetta
isrc code: USB8U1010274
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
additional property: ProofProfileEvidenceStatus
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additional property: TokenDeploymentConfirmed
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-02T11:38:34Z
audio: Das ist der Fruhling von Berlin
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Die Männer sind alle Verbrecher
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duration: PT2M54S
duration ms: 174600
explicit: false
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by artist: Willi Kollo
by artist: Rudolf Schanzer
by artist: Chor und Orchester Theater des Westens, Berlin
by artist: Wolfgang Peters
by artist: Margot Rothweiler
in album: Wie einst im Mai
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genre: operetta
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
additional property: ProofProfileEvidenceStatus
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additional property: TokenDeploymentConfirmed
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additional property: ContentHash
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additional property: BitcoinTime
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:53:27Z
audio: Die Männer sind alle Verbrecher
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Überhaupt, was gehn uns denn die Sorgen an
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by artist: Siegfried Mai und sein Orchester
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genre: vintage-schlager
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
additional property: ProofProfileEvidenceStatus
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additional property: TokenDeploymentConfirmed
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  date published: 2026-07-08T03:53:27Z
audio: Überhaupt, was gehn uns denn die Sorgen an
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Mode (Major/Minor)
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Time Signature
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Danceability
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Energy
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Speechiness
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Acousticness
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Instrumentalness
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Liveness
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Valence (Positivity)
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Loudness (dB)
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Hörst Du das Meer?
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duration: PT4M22S
duration ms: 262386
explicit: false
by artist: Alexander von Chevtschenko
by artist: Ulrich Tukur
by artist: Margot Hielscher
by artist: Lutz Krajenski
by artist: Olaf Casimir
by artist: Matthias Meusel
by artist: Edgar Herzog
by artist: Sebastian Strempel
by artist: Uwe Granitza
by artist: Jansen Folkers
by artist: Adam Zolynski
by artist: Axel Ruhland
in album: Mezzanotte
  type: MusicAlbum
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popularity: 1
isrc code: DEN960902640
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
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additional property: OTSVerificationAPI
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audio: Hörst Du das Meer?
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Internationales Salonmusik Festival Interlaken 1994
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The Golden Era of the German Dance Orchestra: Barnabas von Geczy mit seinem Orchester, Vol. 1 (1935-1940)
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History of German film music, Vol. 5: We Dance Around the World (1938-1940)
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Rene Kollo, Vol. 3: Lieblingsmelodien (1968-1984)
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Ich sing mein schonstes Lied
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track: Das ist der Fruhling von Berlin

Evergreens
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The Golden Era of the German Dance Orchestra: Adolf Steimel, Organum Tanzorchester und andere Formationen (1939-1943)
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  subject of: OpenTimestamps Proof of Existence
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Wie einst im Mai
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track: Die Männer sind alle Verbrecher

Wie einst im Mai [Musikalische Gesamtaufnahme]
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Polskie Tango 1929 - 1939
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-08T08:56:20Z
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    date published: 2026-07-08T08:56:20Z
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OpenTimestamps Proof of Existence
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date published: 2026-07-08T03:22:41Z

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Gdy Odejdziesz
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audio: Gdy Odejdziesz
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Auf den Spuren meiner Väter · René Kollo singt Kollo
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date published: 1992
track: Was eine Frau im Frühling träumt · aus der Operette 'Marietta'
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That Blue Hour (Remastered 2022)
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Wenn der Vater mit dem Sohne... (Unsterbliche Evergreens von Walter und Willi Kollo)
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track: Überhaupt, was gehn uns denn die Sorgen an
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Erfolge, Sammlerstücke & Raritäten - Historische Aufnahmen (Folge 4)
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Kabarett der Weimarer Republik: Max Hansen – "War'n Sie schon mal in mich verliebt?" (Cabaret of the Weimar Republic) [Recorded 1927-1934]
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date published: 2015-02-03

Die Goldene Ära deutscher Tanzorchester: Das Eric Harden Tanzorchester (Recordings 1931-1937)
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Die Goldene Ara Deutscher Vokalensembles (Recorded 1931-1941)
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Heimweh Nach Berlin Vol. 1
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Icons of German Cinema: Frau Meiner Träume – Marika Rökk (Remastered 2017)
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Historische Aufnahmen, Vol. 4 (Deutsche Klassiker 1940-1961)
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Hermann Prey
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Operetten-Schlager, Vol. 5
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The Richard Tauber Collection, Vol. 23: Popular German Songs, Vol. 2 (Recorded 1928-1933)
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date published: 2014-07-01

Operetten Schätze, Vol. 15
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date published: 2015-02-28