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type: MusicGroup
popularity: 5
followers: 27
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSProofURL
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additional property: OTSVerificationAPI
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additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 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
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-06-16T23:44:13Z
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album: The Romantic Age, 500 Years of Classical Music
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  date published: 2011
  track: Liebestraum No. 3, S. 541
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    by artist: Franz Liszt
    by artist: Klára Würtz
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      type: MusicAlbum
      date published: 2011
    genre: classical
    genre: late-romantic-era
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    additional property: OTSVerificationAPI
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    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-08T08:56:20Z
    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
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab31255f7651823c0dc03065e89bbada21044f457c8ca090a996d2765256298. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLY331112153.
      date published: 2026-07-08T08:56:20Z
    audio: Liebestraum No. 3, S. 541
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      additional property: Valence (Positivity)
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  track: Berceuse in D-Flat Major, Op. 57
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    by artist: Alwin Bär
    in album: The Romantic Age, 500 Years of Classical Music
      type: MusicAlbum
      date published: 2011
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    genre: early-romantic-era
    genre: polish-classical
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    additional property: OTSVerificationAPI
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    additional property: OTSTimestamp
      type: PropertyValue
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    additional property: OTSVerifyInstructions
      type: PropertyValue
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    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-07-08T03:22:41Z
    audio: Berceuse in D-Flat Major, Op. 57
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  track: Waltz in C-Sharp Minor, Op. 64 No. 2
  track: March of the Dwarfs, Op. 54 No. 3
  track: Divertimento, K. 334: Menuet
  track: Hungarian Dance No. 1, WoO 1
  track: Les millions D'Arlequin: Serenade
  track: Guitarre, Op. 45 No. 2
album: Beautiful Clasical Melodies
album: The Romantic Cello
album: Top 50 Most Popular Classical Cello
album: Classical Bucket List
album: Summer, Sun & Classical (150 entspannte klassische Titel für den Sommer)
album: Top 40 Favourite Classical Melodies
album: Top 30 Favourite Classical Chillout Tunes
album: Klassieke Muziek voor bij het Kerstdiner
album: Autumn Classics
album: Classical Music for Christmas Dinner
album: Episodes for Two Pianos in Quarter-Tones (Live)
album: Bag
album: The Swan and Other Works

The Carnival of the Animals: XIII. The Swan
type: MusicRecording
duration: PT2M58S
duration ms: 178400
explicit: false
by artist: Camille Saint-Saëns
by artist: Wladislav Warenberg
by artist: Sara Crombach
in album: The Romantic Cello
  type: MusicAlbum
  date published: 2015-01-01
genre: classical
genre: late-romantic-era
genre: french-romanticism
isrc code: NLY331406494
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightChainExplorerURL
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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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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaca65c985c2402772768143126444ddd712fc74ee840eb79d58707ca14ce6f7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLY331406494.
  date published: 2026-07-08T03:22:41Z
audio: The Carnival of the Animals: XIII. The Swan
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  additional property: Tempo (BPM)
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  additional property: Musical Key
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  additional property: Mode (Major/Minor)
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  additional property: Danceability
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  additional property: Energy
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  additional property: Speechiness
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  additional property: Acousticness
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  additional property: Instrumentalness
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  additional property: Liveness
    type: PropertyValue
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
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Carnival of the Animals: The Swan
type: MusicRecording
duration: PT3M4S
duration ms: 184466
explicit: false
by artist: Camille Saint-Saëns
by artist: Wladislaw Warenberg
by artist: Sara Crombach
in album: Top 30 Favourite Classical Chillout Tunes
  type: MusicAlbum
  date published: 2013-08-16
genre: classical
genre: late-romantic-era
genre: french-romanticism
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f2b4fbbc307009a64f812dd2da5da082640ef29ff0668ba1a28f66cea9a214. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/NLY331310299.
  date published: 2026-07-30T14:53:07Z
audio: Carnival of the Animals: The Swan
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  additional property: Tempo (BPM)
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  additional property: Mode (Major/Minor)
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  additional property: Danceability
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additional property: CopyrightID
additional property: ProofProfileEvidenceStatus
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additional property: TokenDeploymentConfirmed
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additional property: ContentHash
additional property: BitcoinBlock
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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

Liveness
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Valence (Positivity)
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Loudness (dB)
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Key Name
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Mode Name
type: PropertyValue
value: Major

Waltz in C-Sharp Minor, Op. 64 No. 2
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duration: PT3M40S
duration ms: 220920
explicit: false
by artist: Frédéric Chopin
by artist: Martijn van den Hoek
in album: The Romantic Age, 500 Years of Classical Music
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genre: classical
genre: early-romantic-era
genre: polish-classical
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additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
  type: PropertyValue
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additional property: OTSTimestamp
  type: PropertyValue
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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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd141de5fd3ea32a156f14bcc2fb1adae176fe7a2eaeb86c33a17dc53d84d6462. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLY331109600.
  date published: 2026-07-02T03:30:09Z
audio: Waltz in C-Sharp Minor, Op. 64 No. 2
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  additional property: Musical Key
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  additional property: Mode (Major/Minor)
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  additional property: Time Signature
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  additional property: Danceability
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  additional property: Energy
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  additional property: Speechiness
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  additional property: Acousticness
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  additional property: Liveness
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
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  additional property: Key Name
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March of the Dwarfs, Op. 54 No. 3
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duration: PT2M54S
duration ms: 174600
explicit: false
by artist: Edvard Grieg
by artist: Håkon Austbø
in album: The Romantic Age, 500 Years of Classical Music
  type: MusicAlbum
  date published: 2011
genre: classical
genre: late-romantic-era
genre: norwegian-classical
isrc code: NLY331109605
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
  type: PropertyValue
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additional property: OTSTimestamp
  type: PropertyValue
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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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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Divertimento, K. 334: Menuet
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Hungarian Dance No. 1, WoO 1
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Guitarre, Op. 45 No. 2
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Beautiful Clasical Melodies
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The Romantic Cello
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Top 50 Most Popular Classical Cello
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Classical Bucket List
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Summer, Sun & Classical (150 entspannte klassische Titel für den Sommer)
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Top 40 Favourite Classical Melodies
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Top 30 Favourite Classical Chillout Tunes
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track: Carnival of the Animals: The Swan

Klassieke Muziek voor bij het Kerstdiner
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date published: 2018-12-14

Autumn Classics
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date published: 2021-11-12

Classical Music for Christmas Dinner
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date published: 2018-12-14

Episodes for Two Pianos in Quarter-Tones (Live)
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date published: 2021-08-26

Bag
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date published: 2016-01-20

The Swan and Other Works
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