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genre: chamber music
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followers: 501
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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album: Works for Violoncello and Piano
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track: Octet in E-Flat Major, Op. 20, MWV R20: I. Allegro moderato, ma con fuoco - Live
track: Octet in E-Flat Major, Op. 20, MWV R20: IV. Presto - Live
track: Octet in C Major, Op. 7: I. Très modéré - Live
track: Octet in C Major, Op. 7: II. Très fougueux - Live
track: Octet in C Major, Op. 7: IV. Mouvement de valse bien rythmée - Live
track: Octet in E-Flat Major, Op. 20, MWV R20: II. Andante - Live
track: Octet in C Major, Op. 7: III. Lentement - Live
track: Octet in E-Flat Major, Op. 20, MWV R20: III. Scherzo (Allegro leggierissimo) - Live

Octet in E-Flat Major, Op. 20, MWV R20: I. Allegro moderato, ma con fuoco - Live
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by artist: Felix Mendelssohn
by artist: Ori Kam
by artist: Rachel Roberts
by artist: Tanja Tetzlaff
by artist: Antje Weithaas
by artist: Christian Tetzlaff
by artist: Isabelle Faust
by artist: Lisa Batiashvili
by artist: Quirine Viersen
in album: Felix Mendelssohn & George Enescu: Octets for Strings (Live)
  type: MusicAlbum
  date published: 2009-08-03
popularity: 5
genre: classical
genre: early-romantic-era
genre: german-romanticism
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  date published: 2026-07-06T07:16:32Z
audio: Octet in E-Flat Major, Op. 20, MWV R20: I. Allegro moderato, ma con fuoco - Live
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Octet in E-Flat Major, Op. 20, MWV R20: IV. Presto - Live
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by artist: Christian Tetzlaff
by artist: Antje Weithaas
by artist: Ori Kam
by artist: Rachel Roberts
by artist: Tanja Tetzlaff
by artist: Quirine Viersen
in album: Felix Mendelssohn & George Enescu: Octets for Strings (Live)
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popularity: 4
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:53:27Z
audio: Octet in E-Flat Major, Op. 20, MWV R20: IV. Presto - Live
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Octet in C Major, Op. 7: I. Très modéré - Live
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duration: PT12M39S
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by artist: George Enescu
by artist: Gustav Rivinius
by artist: Antoine Tamestit
by artist: Quirine Viersen
by artist: Isabelle Faust
by artist: Christian Tetzlaff
by artist: Antje Weithaas
by artist: Kathy Gowers
by artist: Rachel Roberts
in album: Felix Mendelssohn & George Enescu: Octets for Strings (Live)
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  date published: 2009-08-03
popularity: 3
isrc code: DEAQ70900187
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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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additional property: ProofProfileEvidenceStatus
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:22:41Z
audio: Octet in C Major, Op. 7: I. Très modéré - Live
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Octet in C Major, Op. 7: II. Très fougueux - Live
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by artist: Antoine Tamestit
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by artist: Antje Weithaas
by artist: Christian Tetzlaff
by artist: Isabelle Faust
by artist: Kathy Gowers
by artist: Quirine Viersen
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popularity: 3
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additional property: OTSVerifyInstructions
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  date published: 2026-07-08T03:22:41Z
audio: Octet in C Major, Op. 7: II. Très fougueux - Live
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Octet in C Major, Op. 7: IV. Mouvement de valse bien rythmée - Live
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additional property: OTSVerifyInstructions
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  date published: 2026-07-08T03:53:27Z
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Octet in E-Flat Major, Op. 20, MWV R20: II. Andante - Live
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duration: PT6M34S
duration ms: 394960
explicit: false
by artist: Felix Mendelssohn
by artist: Christian Tetzlaff
by artist: Isabelle Faust
by artist: Lisa Batiashvili
by artist: Antje Weithaas
by artist: Quirine Viersen
by artist: Tanja Tetzlaff
by artist: Rachel Roberts
by artist: Ori Kam
in album: Felix Mendelssohn & George Enescu: Octets for Strings (Live)
  type: MusicAlbum
  date published: 2009-08-03
popularity: 2
genre: classical
genre: early-romantic-era
genre: german-romanticism
isrc code: DEAQ70900184
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additional property: CopyrightRegisteredAt
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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: 2026-07-08T03:22:41Z
audio: Octet in E-Flat Major, Op. 20, MWV R20: II. Andante - Live
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Octet in C Major, Op. 7: III. Lentement - Live
type: MusicRecording
duration: PT9M52S
duration ms: 592760
explicit: false
by artist: George Enescu
by artist: Quirine Viersen
by artist: Gustav Rivinius
by artist: Antoine Tamestit
by artist: Rachel Roberts
by artist: Antje Weithaas
by artist: Christian Tetzlaff
by artist: Isabelle Faust
by artist: Kathy Gowers
in album: Felix Mendelssohn & George Enescu: Octets for Strings (Live)
  type: MusicAlbum
  date published: 2009-08-03
popularity: 2
isrc code: DEAQ70900189
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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
  type: PropertyValue
  value: verified-cc-db-prod
additional property: TokenDeploymentConfirmed
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additional property: ContentHash
additional property: BitcoinBlock
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additional property: BitcoinTime
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subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dda539a2444703440e064bdf5b3e18d287219ac09177d4663b0fb5636d1470d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAQ70900189.
  date published: 2026-07-08T03:20:19Z
audio: Octet in C Major, Op. 7: III. Lentement - Live
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Octet in E-Flat Major, Op. 20, MWV R20: III. Scherzo (Allegro leggierissimo) - Live
type: MusicRecording
duration: PT4M19S
duration ms: 259426
explicit: false
by artist: Felix Mendelssohn
by artist: Tanja Tetzlaff
by artist: Rachel Roberts
by artist: Ori Kam
by artist: Lisa Batiashvili
by artist: Isabelle Faust
by artist: Christian Tetzlaff
by artist: Antje Weithaas
by artist: Quirine Viersen
in album: Felix Mendelssohn & George Enescu: Octets for Strings (Live)
  type: MusicAlbum
  date published: 2009-08-03
popularity: 4
genre: classical
genre: early-romantic-era
genre: german-romanticism
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94d4f731d5343db3c4fe989fad07ce3029bce7bf24c23a98b3f19a6a2746253. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAQ70900185.
  date published: 2026-07-30T03:35:13Z
audio: Octet in E-Flat Major, Op. 20, MWV R20: III. Scherzo (Allegro leggierissimo) - Live
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  additional property: Danceability
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  additional property: Acousticness
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  additional property: Instrumentalness
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  additional property: Liveness
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  additional property: Loudness (dB)
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additional property: CopyrightID
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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additional property: OTSVerificationAPI
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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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