Juan Carlos Cobián
type: MusicGroup
genre: tango
description: 150px|thumb|Juan Carlos Cobián Juan Carlos Cobián (1888–1953) was an Argentine bandleader and tango composer.Carlos G. Groppa The Tango in the United States: A History 2004 Page 99 "Almost 50 years la
popularity: 13
followers: 555
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additional property: OTSVerifyInstructions
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  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 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
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-06-14T09:36:10Z
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album: Orquestas Inolvidables, Vol. 1
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  date published: 2016-07-14
album: Orchestral Tango
  type: MusicAlbum
  date published: 2010-12-01
album: Vintage Argentine Tangos (1928 - 1954), Vol. 2
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  date published: 2017-10-27
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    by artist: Edgardo Donato
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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
    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-07-02T03:55:08Z
    audio: Sinsabor
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  track: La canción de Buenos Aires
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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
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
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      date published: 2026-06-13T13:32:09Z
    audio: La canción de Buenos Aires
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album: Entrador (1952-1953)
album: Argentina!: Tango Legends from Gardel to Piazzolla
album: Tango - An Anthology
album: Alvorada
album: 50 Best Tango
album: De puerto en puerto (1952-1957)
album: Tango Sinfónico
album: Tango (Mano A Mano)
album: Master of the Bandoneon: Tango Argentino and Baroque Classics
album: Trio Hugo Diaz: Tango Argentino
album: Tango of the World / Tanga Świata / Tangos der Welt / tango mundial
album: Rey de Copas (Historical Recordings)
album: Gaucho Lindo
album: El Pirata
album: Floreal
album: Besos Brujos
album: Ave De Paso
album: Virginia
album: The Roots of Tango - El Pirata
album: Los Mareados (Arr. A. Arias)
album: Nostalgias
album: Sin Palabras
album: Timeless Tango
album: Twe słowa na rozstanie (1931-1939)
album: Nuevo Quinteto Real
album: Dolor inmenso
album: Duo CM (Cibils - Mizuno)
album: Tango Legends Vol 3: Classics
album: Der makabere Zirkus
album: Latinoamericana
album: Stara melodja
album: Lo mismo que un tango (1941-1946)
album: Tango Music: Tango Futur
album: 25 Sucesos: El major de tango
album: Olivia
album: Piosenka stara jak świat
album: Un Señor Tango (En Vivo)
album: El Arte de la Fuga y del Tango
album: Tangorama: An Anthology of 20th Century Tango, Vol. 1
album: El metejon (1950 - 1953)
album: Tango para Todo el Mundo
album: Tangos y Milongas : The Heart of Argentinian Tango
album: El Tango-Mi Refugio - Musica del Rio de la Plata
album: A Los Maestros (20th Century Music for Bandoneon and Guitar)
album: El Tango Vol. 3
album: Birds of a Feather
album: El duende
album: Vuelvo al Sur (Spanish and South American Music)

Instrumentalness
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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
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Entrador (1952-1953)
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date published: 2018-04-07
track: N.N.
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    date published: 2018-04-07
  genre: tango
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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
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
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    date published: 2026-07-02T03:55:08Z
  audio: N.N.
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track: Seguime si podes
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  additional property: OTSVerifyInstructions
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-22T20:03:42Z
  audio: Seguime si podes
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track: La ultima copa
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  subject of: OpenTimestamps Proof of Existence
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OTSVerificationAPI
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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

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e161c1e8ac34759fd1f6035a6d7cf544cf162a61f25d7be9141717570a7ff66. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:59:00Z), 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/CA5KR1800586.
date published: 2026-07-22T18:59:00Z

La ultima copa
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Argentina!: Tango Legends from Gardel to Piazzolla
type: MusicAlbum
date published: 2014-05-19

Tango - An Anthology
type: MusicAlbum
date published: 2011-07-15

Alvorada
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date published: 2015-03-30
track: Siete canciones populares españolas: IV. jota
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  by artist: Ophélie Gaillard
  by artist: David Chupete
  by artist: Emmanuel Rossfelder
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    type: PropertyValue
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  additional property: OTSBitcoinBlock
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  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/959155
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FROV61410401
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-22T19:29:13Z
  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
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f1ba4a26350dd61ccc457fc63e790fafe41b0ff148a29aa7702f057adfb5b6. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:29:13Z), 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/FROV61410401.
    date published: 2026-07-22T19:29:13Z
  audio: Siete canciones populares españolas: IV. jota
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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: 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: Instrumentalness
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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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track: Tarde em itapuã
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  by artist: Vinícius de Moraes
  by artist: Ophélie Gaillard
  by artist: Romain Lécuyer
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    type: MusicAlbum
    date published: 2015-03-30
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  additional property: CopyrightID
  additional property: CopyrightStatus
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  additional property: CopyrightRegisteredAt
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    value: https://blockstream.info/api/block-height/953513
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FROV61410419
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-06-13T12:47:07Z
  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
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0521d11f655a5940dd2f1e1355b299580e9cc64c04b2673bf050015e6cdafcc1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FROV61410419.
    date published: 2026-06-13T12:47:07Z
  audio: Tarde em itapuã
    type: AudioObject
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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
      type: PropertyValue
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    additional property: Danceability
      type: PropertyValue
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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
      type: PropertyValue
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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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track: Alvorada
  type: MusicRecording
  duration: PT4M10S
  duration ms: 250320
  explicit: false
  by artist: Carlos Cachaca
  by artist: Cartola
  by artist: Ophélie Gaillard
  by artist: Rubens Celso Lopes
  by artist: Christian Paoli
  by artist: Fabien Cyprien
  by artist: Romain Lécuyer
  by artist: Gerardo Di Giusto
  by artist: Luiz de Aquino
  by artist: Toquinho
  in album: Alvorada
    type: MusicAlbum
    date published: 2015-03-30
  genre: samba
  isrc code: FROV61410405
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
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  additional property: CopyrightRegisteredAt
  additional property: CopyrightChainExplorerURL
  additional property: OTSHash
  additional property: OTSBitcoinBlock
  additional property: OTSBitcoinBlockVerifyURL
  additional property: OTSVerificationAPI
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: Alvorada
track: Oblivion

CopyrightRegisteredAt
type: PropertyValue
value: 2026-07-06T04:45:07+00:00

CopyrightChainExplorerURL
type: PropertyValue
value: https://explorer.copyrightchains.com/tx/0x9bffe3d8f6e94aa25bfe010aa934078bf6810ef4b656ca19cdca2d8f64931d6d

OTSHash
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OTSBitcoinBlock
type: PropertyValue
value: 956889

OTSBitcoinBlockVerifyURL
type: PropertyValue
value: https://blockstream.info/api/block-height/956889

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FROV61410405

OTSTimestamp
type: PropertyValue
value: 2026-07-06T06:56:49Z

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

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bffe3d8f6e94aa25bfe010aa934078bf6810ef4b656ca19cdca2d8f64931d6d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FROV61410405.
date published: 2026-07-06T06:56:49Z

Alvorada
type: AudioObject
additional property: Tempo (BPM)
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additional property: Musical Key
  type: PropertyValue
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additional property: Mode (Major/Minor)
  type: PropertyValue
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additional property: Time Signature
  type: PropertyValue
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additional property: Danceability
  type: PropertyValue
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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
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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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additional property: Mode Name
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Oblivion
type: MusicRecording
duration: PT3M57S
duration ms: 237653
explicit: false
by artist: Astor Piazzolla
by artist: Ophélie Gaillard
by artist: Fernando Maguna
by artist: Romain Lécuyer
by artist: Juanjo Mosalini
in album: Alvorada
  type: MusicAlbum
  date published: 2015-03-30
isrc code: FROV61410411
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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  value: https://explorer.copyrightchains.com/tx/0x64b2a0eb1a069c0a56866c969953abe4faabede2ae39ec62022183cc5f4332c3
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956304
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956304
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FROV61410411
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-02T03:55:08Z
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b2a0eb1a069c0a56866c969953abe4faabede2ae39ec62022183cc5f4332c3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FROV61410411.
  date published: 2026-07-02T03:55:08Z
audio: Oblivion
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 106.983
  additional property: Musical Key
    type: PropertyValue
    value: 0
  additional property: Mode (Major/Minor)
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  additional property: Time Signature
    type: PropertyValue
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  additional property: Danceability
    type: PropertyValue
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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
    type: PropertyValue
    value: 0.682
  additional property: Liveness
    type: PropertyValue
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  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.109
  additional property: Loudness (dB)
    type: PropertyValue
    value: -18.906
  additional property: Key Name
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  additional property: Mode Name
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50 Best Tango
type: MusicAlbum
date published: 2011-03-04

De puerto en puerto (1952-1957)
type: MusicAlbum
date published: 2018-03-06
track: Nostalgias
  type: MusicRecording
  duration: PT3M24S
  duration ms: 204426
  explicit: false
  by artist: Juan Carlos Cobián
  by artist: Orquesta de Juan Sanches Gorio
  by artist: Osvaldo Bazan
  in album: De puerto en puerto (1952-1957)
    type: MusicAlbum
    date published: 2018-03-06
  popularity: 8
  genre: tango
  isrc code: CA5KR1718001
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  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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    value: 956304
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956304
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1718001
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-02T03:55:08Z
  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
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc125cac928d3629adee8ca37f953c82c080b0af4140381b724ba359bf21f43. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CA5KR1718001.
    date published: 2026-07-02T03:55:08Z
  audio: Nostalgias
    type: AudioObject
    additional property: Tempo (BPM)
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    additional property: Musical Key
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      value: 7
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.478
    additional property: Energy
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    additional property: Speechiness
      type: PropertyValue
      value: 0.054
    additional property: Acousticness
      type: PropertyValue
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    additional property: Instrumentalness
      type: PropertyValue
      value: 0.001
    additional property: Liveness
      type: PropertyValue
      value: 0.392
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.762
    additional property: Loudness (dB)
      type: PropertyValue
      value: -9.199
    additional property: Key Name
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    additional property: Mode Name
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Tango Sinfónico
type: MusicAlbum
date published: 2006-01-01

Tango (Mano A Mano)
type: MusicAlbum
date published: 2010-11-08

Master of the Bandoneon: Tango Argentino and Baroque Classics
type: MusicAlbum
date published: 2010-02-01

Trio Hugo Diaz: Tango Argentino
type: MusicAlbum
date published: 2007-01-01

Tango of the World / Tanga Świata / Tangos der Welt / tango mundial
type: MusicAlbum
date published: 2006-09-06
track: Caminito
  type: MusicRecording
  duration: PT2M55S
  duration ms: 175658
  explicit: false
  by artist: Grzegorz Falkowski
  by artist: Juan De Dios Filiberto
  by artist: Andrzej Rewak
  by artist: Gabino Coria Peñaloza
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    type: MusicAlbum
    date published: 2006-09-06
  isrc code: PLB590600005
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  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
    type: PropertyValue
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  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLB590600005
  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
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec29f45b5ba22ca47aea1fba2698be5a66abda30ed4bdab7abce198513707af6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PLB590600005.
    date published: 2026-07-02T05:09:12Z
  audio: Caminito
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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: Speechiness
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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: Valence (Positivity)
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    additional property: Loudness (dB)
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Rey de Copas (Historical Recordings)
type: MusicAlbum
date published: 2015-06-26

Gaucho Lindo
type: MusicAlbum
date published: 2014-10-26

El Pirata
type: MusicAlbum
date published: 2014-10-26

Floreal
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date published: 2014-09-10

Besos Brujos
type: MusicAlbum
date published: 2014-08-28

Ave De Paso
type: MusicAlbum
date published: 2014-08-28

Virginia
type: MusicAlbum
date published: 2014-07-21

The Roots of Tango - El Pirata
type: MusicAlbum
date published: 2011

Los Mareados (Arr. A. Arias)
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date published: 2021-08-20
track: Los Mareados (Arr. A. Arias)
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  duration: PT4M22S
  duration ms: 262333
  explicit: false
  by artist: Juan Carlos Cobián
  by artist: Leonardo Lucero
  in album: Los Mareados (Arr. A. Arias)
    type: MusicAlbum
    date published: 2021-08-20
  genre: tango
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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
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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
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94399b93f903641211bda42aff87a0a166d7454c95f598a9e640653c5d69466e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZK6H2173768.
    date published: 2026-06-13T13:32:09Z
  audio: Los Mareados (Arr. A. Arias)
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 117.06
    additional property: Musical Key
      type: PropertyValue
      value: 9
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.485
    additional property: Energy
      type: PropertyValue
      value: 0.108
    additional property: Speechiness
      type: PropertyValue
      value: 0.053
    additional property: Acousticness
      type: PropertyValue
      value: 0.982
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.929
    additional property: Liveness
      type: PropertyValue
      value: 0.107
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.252
    additional property: Loudness (dB)
      type: PropertyValue
      value: -23.056
    additional property: Key Name
      type: PropertyValue
      value: A
    additional property: Mode Name
      type: PropertyValue
      value: Minor

Nostalgias
type: MusicAlbum
date published: 2016-12-25

Sin Palabras
type: MusicAlbum
date published: 2019-02-01
track: La vida es una Milonga
  type: MusicRecording
  duration: PT2M21S
  duration ms: 141692
  explicit: false
  by artist: Fernando Montoni
  by artist: Cuarteto Soltango
  in album: Sin Palabras
    type: MusicAlbum
    date published: 2019-02-01
  popularity: 14
  isrc code: DEAQ71942405
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-06-26T00:06:26+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xfcd3a41b55d72a1327609b5a953fd3642b00978e6898217ad72d11c92435d6f5
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956304
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956304
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAQ71942405
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-02T03:55:08Z
  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
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd3a41b55d72a1327609b5a953fd3642b00978e6898217ad72d11c92435d6f5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEAQ71942405.
    date published: 2026-07-02T03:55:08Z
  audio: La vida es una Milonga
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 127.87
    additional property: Musical Key
      type: PropertyValue
      value: 5
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.654
    additional property: Energy
      type: PropertyValue
      value: 0.278
    additional property: Speechiness
      type: PropertyValue
      value: 0.035
    additional property: Acousticness
      type: PropertyValue
      value: 0.812
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.155
    additional property: Liveness
      type: PropertyValue
      value: 0.104
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.917
    additional property: Loudness (dB)
      type: PropertyValue
      value: -18.639
    additional property: Key Name
      type: PropertyValue
      value: F
    additional property: Mode Name
      type: PropertyValue
      value: Minor

Timeless Tango
type: MusicAlbum
date published: 2006-01-01
track: Balada para un loco
  type: MusicRecording
  duration: PT2M47S
  duration ms: 167106
  explicit: false
  by artist: Astor Piazzolla
  by artist: Alfredo Marcucci
  by artist: Ensemble Piacevole
  in album: Timeless Tango
    type: MusicAlbum
    date published: 2006-01-01
  isrc code: NLA460610103
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-06-23T15:51:38+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x897cc512d07d5b75012fc737e90faf125a8173d2cb69bef65182569692f02f06
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956304
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956304
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA460610103
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-02T03:55:08Z
  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
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897cc512d07d5b75012fc737e90faf125a8173d2cb69bef65182569692f02f06. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLA460610103.
    date published: 2026-07-02T03:55:08Z
  audio: Balada para un loco
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 100.986
    additional property: Musical Key
      type: PropertyValue
      value: 0
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.28
    additional property: Energy
      type: PropertyValue
      value: 0.078
    additional property: Speechiness
      type: PropertyValue
      value: 0.043
    additional property: Acousticness
      type: PropertyValue
      value: 0.881
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.04
    additional property: Liveness
      type: PropertyValue
      value: 0.075
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.119
    additional property: Loudness (dB)
      type: PropertyValue
      value: -17.82
    additional property: Key Name
      type: PropertyValue
      value: C
    additional property: Mode Name
      type: PropertyValue
      value: Major

Twe słowa na rozstanie (1931-1939)
type: MusicAlbum
date published: 2017-02-05
track: Niebieskie róże, from “Taniec szczęścia”
  type: MusicRecording
  duration: PT3M10S
  duration ms: 190406
  explicit: false
  by artist: Mieczysław Fogg
  by artist: Mieczyslaw Mierzejewski
  in album: Twe słowa na rozstanie (1931-1939)
    type: MusicAlbum
    date published: 2017-02-05
  genre: classic-polish-pop
  isrc code: CA5KR1537532
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-06-19T16:06:00+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xc626f4e9c6cd28ea46ec9000bdb48c7f70ff06201daaf073c0de52b781dd6ff6
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956302
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956302
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1537532
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-02T03:30:09Z
  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
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc626f4e9c6cd28ea46ec9000bdb48c7f70ff06201daaf073c0de52b781dd6ff6. 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/CA5KR1537532.
    date published: 2026-07-02T03:30:09Z
  audio: Niebieskie róże, from “Taniec szczęścia”
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 123.985
    additional property: Musical Key
      type: PropertyValue
      value: 8
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.572
    additional property: Energy
      type: PropertyValue
      value: 0.238
    additional property: Speechiness
      type: PropertyValue
      value: 0.056
    additional property: Acousticness
      type: PropertyValue
      value: 0.984
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.004
    additional property: Liveness
      type: PropertyValue
      value: 0.123
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.577
    additional property: Loudness (dB)
      type: PropertyValue
      value: -16.23
    additional property: Key Name
      type: PropertyValue
      value: Ab
    additional property: Mode Name
      type: PropertyValue
      value: Minor

Nuevo Quinteto Real
type: MusicAlbum
date published: 1999-09-07
track: Ensueños
  type: MusicRecording
  duration: PT3M10S
  duration ms: 190400
  explicit: false
  by artist: Juan Salvatore
  by artist: Juan Salvatore and Armando Tagini
  by artist: Nuevo Quinteto Real
  by artist: Jorge Da Silva
  in album: Nuevo Quinteto Real
    type: MusicAlbum
    date published: 1999-09-07
  isrc code: ARF119900048
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-06-27T18:09:51+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x232490c0fa4b0f077299144dd58f8d246a32f3fc6df188c00f41434f7672bd74
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956304
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956304
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF119900048
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-02T03:55:08Z
  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
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232490c0fa4b0f077299144dd58f8d246a32f3fc6df188c00f41434f7672bd74. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ARF119900048.
    date published: 2026-07-02T03:55:08Z
  audio: Ensueños
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 121.114
    additional property: Musical Key
      type: PropertyValue
      value: 4
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.624
    additional property: Energy
      type: PropertyValue
      value: 0.261
    additional property: Speechiness
      type: PropertyValue
      value: 0.061
    additional property: Acousticness
      type: PropertyValue
      value: 0.63
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.271
    additional property: Liveness
      type: PropertyValue
      value: 0.344
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.655
    additional property: Loudness (dB)
      type: PropertyValue
      value: -13.878
    additional property: Key Name
      type: PropertyValue
      value: E
    additional property: Mode Name
      type: PropertyValue
      value: Minor

Dolor inmenso
type: MusicAlbum
date published: 2017-04-15
track: El ventarron
  type: MusicRecording
  duration: PT3M13S
  duration ms: 193018
  explicit: false
  by artist: Orquesta Porfirio Díaz
  by artist: Luis Aranguiz
  by artist: Porfirio Díaz
  in album: Dolor inmenso
    type: MusicAlbum
    date published: 2017-04-15
  isrc code: CA5KR1549625
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-06-22T03:08:53+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x383a7de8d40515d8cd0ce3e8c4e543b825b13b2c9c71c1654cc101212c920e0e
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956304
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956304
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1549625
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-02T03:55:08Z
  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
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383a7de8d40515d8cd0ce3e8c4e543b825b13b2c9c71c1654cc101212c920e0e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CA5KR1549625.
    date published: 2026-07-02T03:55:08Z
  audio: El ventarron
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 114.948
    additional property: Musical Key
      type: PropertyValue
      value: 5
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.647
    additional property: Energy
      type: PropertyValue
      value: 0.458
    additional property: Speechiness
      type: PropertyValue
      value: 0.051
    additional property: Acousticness
      type: PropertyValue
      value: 0.954
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.498
    additional property: Liveness
      type: PropertyValue
      value: 0.412
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.968
    additional property: Loudness (dB)
      type: PropertyValue
      value: -16.085
    additional property: Key Name
      type: PropertyValue
      value: F
    additional property: Mode Name
      type: PropertyValue
      value: Major

Duo CM (Cibils - Mizuno)
type: MusicAlbum
date published: 2023-10-11

Tango Legends Vol 3: Classics
type: MusicAlbum
date published: 2011-11-02
track: El Choclo
  type: MusicRecording
  duration: PT3M12S
  duration ms: 192666
  explicit: false
  by artist: Ángel Villoldo
  in album: Tango Legends Vol 3: Classics
    type: MusicAlbum
    date published: 2011-11-02
  isrc code: ARF411101283
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-06-25T10:22:05+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x80f22d0809faa5ee37e39301eaee57ce91abd20c45268116ef33521a3c4cc61c
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956304
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956304
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF411101283
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-02T03:55:08Z
  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
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f22d0809faa5ee37e39301eaee57ce91abd20c45268116ef33521a3c4cc61c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ARF411101283.
    date published: 2026-07-02T03:55:08Z
  audio: El Choclo
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 101.146
    additional property: Musical Key
      type: PropertyValue
      value: 9
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.616
    additional property: Energy
      type: PropertyValue
      value: 0.086
    additional property: Speechiness
      type: PropertyValue
      value: 0.623
    additional property: Acousticness
      type: PropertyValue
      value: 0.996
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.834
    additional property: Liveness
      type: PropertyValue
      value: 0.114
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.619
    additional property: Loudness (dB)
      type: PropertyValue
      value: -21.807
    additional property: Key Name
      type: PropertyValue
      value: A
    additional property: Mode Name
      type: PropertyValue
      value: Major

Der makabere Zirkus
type: MusicAlbum
date published: 2020-10-30

Latinoamericana
type: MusicAlbum
date published: 2019-01-11

Stara melodja
type: MusicAlbum
date published: 2019-07-09

Lo mismo que un tango (1941-1946)
type: MusicAlbum
date published: 2018-03-02

Tango Music: Tango Futur
type: MusicAlbum
date published: 2003-01-31

25 Sucesos: El major de tango
type: MusicAlbum
date published: 2014-05-01

Olivia
type: MusicAlbum
date published: 2020-05-05

Piosenka stara jak świat
type: MusicAlbum
date published: 2019-07-10

Un Señor Tango (En Vivo)
type: MusicAlbum
date published: 2018-12-21

El Arte de la Fuga y del Tango
type: MusicAlbum
date published: 2016-12-02

Tangorama: An Anthology of 20th Century Tango, Vol. 1
type: MusicAlbum
date published: 2021-01-15

El metejon (1950 - 1953)
type: MusicAlbum
date published: 2017-04-28

Tango para Todo el Mundo
type: MusicAlbum
date published: 2006

Tangos y Milongas : The Heart of Argentinian Tango
type: MusicAlbum
date published: 1995

El Tango-Mi Refugio - Musica del Rio de la Plata
type: MusicAlbum
date published: 2025-02-07

A Los Maestros (20th Century Music for Bandoneon and Guitar)
type: MusicAlbum
date published: 2021-06-11

El Tango Vol. 3
type: MusicAlbum
date published: 2010-03-11

Birds of a Feather
type: MusicAlbum
date published: 2021-10-14

El duende
type: MusicAlbum
date published: 2020-11-26

Vuelvo al Sur (Spanish and South American Music)
type: MusicAlbum
date published: 2022-05-03