Cuarteto Leo
type: MusicGroup
genre: cuarteto
popularity: 22
followers: 29659
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xfa18f2b29fcbe8335e9b3fd67887223fa49bf20b0b2eae1cfedb96349a62c8cd
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953407
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953407
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/564308db-bc8a-432f-8b54-52a2a696400d.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/564308db-bc8a-432f-8b54-52a2a696400d.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/564308db-bc8a-432f-8b54-52a2a696400d
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xfa18f2b29fcbe8335e9b3fd67887223fa49bf20b0b2eae1cfedb96349a62c8cd","name":"Cuarteto Leo","registered_at":"2026-06-11T21:10:23Z","symbol":"NIM0112662","token_address":"0x48a197eed8742ecc6b9ee568e204d326a031c087","type":"artist","uuid":"564308db-bc8a-432f-8b54-52a2a696400d"}
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 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 0xfa18f2b29fcbe8335e9b3fd67887223fa49bf20b0b2eae1cfedb96349a62c8cd. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/564308db-bc8a-432f-8b54-52a2a696400d.json and https://artists.proofprofile.net/proofs/artist/564308db-bc8a-432f-8b54-52a2a696400d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T19:24:56Z
  text: {"copyright_id":"0xfa18f2b29fcbe8335e9b3fd67887223fa49bf20b0b2eae1cfedb96349a62c8cd","name":"Cuarteto Leo","registered_at":"2026-06-11T21:10:23Z","symbol":"NIM0112662","token_address":"0x48a197eed8742ecc6b9ee568e204d326a031c087","type":"artist","uuid":"564308db-bc8a-432f-8b54-52a2a696400d"}
album: Canta José Sosa Mendieta
  type: MusicAlbum
  date published: 1959-01-01
album: Del Brazo Con la Suerte
  type: MusicAlbum
  date published: 1960
  track: Plaza Colón
    type: MusicRecording
    duration: PT2M24S
    duration ms: 144720
    explicit: false
    by artist: Cuarteto Leo
    in album: Del Brazo Con la Suerte
      type: MusicAlbum
      date published: 1960
    genre: cuarteto
    isrc code: ARFSB0800490
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-05T16:05:33+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x2fb3e1f43cf76518366938754ed171d1428fb649a78a0ecdb38eaa047b50a22a
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956826
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956826
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARFSB0800490
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-05T19:27:56Z
    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 0x2fb3e1f43cf76518366938754ed171d1428fb649a78a0ecdb38eaa047b50a22a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ARFSB0800490.
      date published: 2026-07-05T19:27:56Z
    audio: Plaza Colón
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 200.913
      additional property: Musical Key
        type: PropertyValue
        value: 7
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 3
      additional property: Danceability
        type: PropertyValue
        value: 0.446
      additional property: Energy
        type: PropertyValue
        value: 0.571
      additional property: Speechiness
        type: PropertyValue
        value: 0.078
      additional property: Acousticness
        type: PropertyValue
        value: 0.7
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.37
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.745
      additional property: Loudness (dB)
        type: PropertyValue
        value: -4.983
      additional property: Key Name
        type: PropertyValue
        value: G
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: Sigue la Fiesta
  type: MusicAlbum
  date published: 1961-07-06
album: Al Baile!!...
  type: MusicAlbum
  date published: 1961-07-06
album: Cuarteto Leo
  type: MusicAlbum
  date published: 1962-07-06
  track: El Vals de los Quince Años
    type: MusicRecording
    duration: PT2M44S
    duration ms: 164880
    explicit: false
    by artist: Cuarteto Leo
    in album: Cuarteto Leo
      type: MusicAlbum
      date published: 1962-07-06
    genre: cuarteto
    isrc code: ARF109903434
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-18T19:37:03+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xfea9bbc1614e3ff332c2ee6f1a232ecdc4357382b15cf16395d86fac459cf6ce
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958607
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958607
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF109903434
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-18T21:01:11Z
    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 0xfea9bbc1614e3ff332c2ee6f1a232ecdc4357382b15cf16395d86fac459cf6ce. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/ARF109903434.
      date published: 2026-07-18T21:01:11Z
    audio: El Vals de los Quince Años
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 105.485
      additional property: Musical Key
        type: PropertyValue
        value: 7
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 3
      additional property: Danceability
        type: PropertyValue
        value: 0.447
      additional property: Energy
        type: PropertyValue
        value: 0.43
      additional property: Speechiness
        type: PropertyValue
        value: 0.028
      additional property: Acousticness
      additional property: Instrumentalness
      additional property: Liveness
      additional property: Valence (Positivity)
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name
album: Un Placer
album: Bailando Con Leo
album: Cuarteto Leo en el Club de la Popularidad
album: Que Siga el Baile
album: Leo Pasa la Escobita
album: Repartiendo Alegrías
album: Cuarteto Parrandero
album: ¡Ritmo y Simpatía!
album: El Cuarteto Gigante
album: El Número 15 del Cuarteto Leo
album: Ahí Va el Catorce del Cuarteto Leo
album: La Serenata Criolla
album: Las Bodas de Plata del Cuarteto Leo
album: A Gozar Con el Cuarteto Leo
album: Leo por Acá, Leo por Allá
album: Realmente el Único
album: La Vida Sigue Igual
album: A Reir, a Bailar... y las Penas Olvidar
album: ¡Viva la Felicidad!
album: Para Nuestro Público
album: Alegrando el Corazón
album: Todo Es Alegría y Cordialidad Con el Cuarteto Leo
album: Con Tu Permiso... Aquí Está Leo, Rey de los Cuartetos
album: Quien Le Pone el Cascabel a Leo?
album: Llegó el Sucundín Con el Cuarteto Leo
album: Rey y Señor de los Cuartetos
album: Porque Te Quiero Así, Te Regalo el 31
album: Con Su Estilo Famoso
album: Dale Soga Nomás... Que Va el 33 del Cuarteto Leo
album: 34 Aniversario
album: El Infalible... Cuarteto Leo y Su N° 35
album: El Tiempo Pasa y Sigue el Cuarteto Leo
album: Aquí Está el Rey de la Alegría
album: Saldré a Buscar el Amor
album: Los Más Grandes Éxitos del Cuarteto Leo
album: Vivir Así Feliz Con el Cuarteto Leo
album: Mi Vida Quiero Vivir Bailando Con el Cuarteto Leo
album: Sigue Sonriendo Con el Cuarteto Leo
album: Mentira, No Hay Drama... Con el Cuarteto Leo
album: Te Pido Que Me Guíes Con el Cuarteto Leo
album: Toda una Vida Con el Cuarteto Leo
album: Quieres Tú, Quiero Yo al Feliz Cuarteto Leo
album: A Toda Marcha Con el Cuarteto Leo
album: Simplemente... el Mejor
album: Ponele la Firma... Que Va a Andar el Cuarteto Leo
album: La Descose Con el N° 50
album: Empieza Con P...
album: Cuarteto Leo y Doble Cuarteto
album: Los Esenciales
album: 14 De Colección
album: Los Elegidos: Cuarteto Leo
album: Lo Nuevo

Acousticness
type: PropertyValue
value: 0.581

Instrumentalness
type: PropertyValue
value: 0

Liveness
type: PropertyValue
value: 0.25

Valence (Positivity)
type: PropertyValue
value: 0.793

Loudness (dB)
type: PropertyValue
value: -8.201

Key Name
type: PropertyValue
value: G

Mode Name
type: PropertyValue
value: Major

Un Placer
type: MusicAlbum
date published: 1962-07-06

Bailando Con Leo
type: MusicAlbum
date published: 1963-07-06

Cuarteto Leo en el Club de la Popularidad
type: MusicAlbum
date published: 1963-07-06
track: El Niño de las Monjas
  type: MusicRecording
  duration: PT2M44S
  duration ms: 164253
  explicit: false
  by artist: Cuarteto Leo
  in album: Cuarteto Leo en el Club de la Popularidad
    type: MusicAlbum
    date published: 1963-07-06
  genre: cuarteto
  isrc code: ARF109903428
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-04T04:34:42+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xa75e7ec5ef198984d6cb447bc96f00604eb45e96f54089da2bd0eb8ccba57618
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956634
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956634
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF109903428
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-04T10:04:33Z
  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 0xa75e7ec5ef198984d6cb447bc96f00604eb45e96f54089da2bd0eb8ccba57618. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ARF109903428.
    date published: 2026-07-04T10:04:33Z
  audio: El Niño de las Monjas
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 141.932
    additional property: Musical Key
      type: PropertyValue
      value: 4
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.634
    additional property: Energy
      type: PropertyValue
      value: 0.517
    additional property: Speechiness
      type: PropertyValue
      value: 0.029
    additional property: Acousticness
      type: PropertyValue
      value: 0.666
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.158
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.963
    additional property: Loudness (dB)
      type: PropertyValue
      value: -5.275
    additional property: Key Name
      type: PropertyValue
      value: E
    additional property: Mode Name
      type: PropertyValue
      value: Minor

Que Siga el Baile
type: MusicAlbum
date published: 1963-07-06

Leo Pasa la Escobita
type: MusicAlbum
date published: 1964-07-06

Repartiendo Alegrías
type: MusicAlbum
date published: 1965-07-06

Cuarteto Parrandero
type: MusicAlbum
date published: 1965-07-13
track: La Chica del 17
  type: MusicRecording
  duration: PT2M43S
  duration ms: 163973
  explicit: false
  by artist: Cuarteto Leo
  in album: Cuarteto Parrandero
    type: MusicAlbum
    date published: 1965-07-13
  genre: cuarteto
  isrc code: ARF109902372
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-19T18:17:36+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x5ff2bacda7b4e6e264307c66eed9a122c3d3e40f2db0ae72249bd97955a73cde
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958770
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958770
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF109902372
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-19T19:26:13Z
  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 0x5ff2bacda7b4e6e264307c66eed9a122c3d3e40f2db0ae72249bd97955a73cde. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/ARF109902372.
    date published: 2026-07-19T19:26:13Z
  audio: La Chica del 17
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 143.264
    additional property: Musical Key
      type: PropertyValue
      value: 2
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.726
    additional property: Energy
      type: PropertyValue
      value: 0.663
    additional property: Speechiness
      type: PropertyValue
      value: 0.037
    additional property: Acousticness
      type: PropertyValue
      value: 0.145
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.09
    additional property: Liveness
      type: PropertyValue
      value: 0.043
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.961
    additional property: Loudness (dB)
      type: PropertyValue
      value: -5.572
    additional property: Key Name
      type: PropertyValue
      value: D
    additional property: Mode Name
      type: PropertyValue
      value: Major

¡Ritmo y Simpatía!
type: MusicAlbum
date published: 1966-07-13

El Cuarteto Gigante
type: MusicAlbum
date published: 1966-07-13

El Número 15 del Cuarteto Leo
type: MusicAlbum
date published: 1967-07-13

Ahí Va el Catorce del Cuarteto Leo
type: MusicAlbum
date published: 1967-07-13

La Serenata Criolla
type: MusicAlbum
date published: 1968-07-13

Las Bodas de Plata del Cuarteto Leo
type: MusicAlbum
date published: 1968-07-13
track: Se Quema el Rancho
  type: MusicRecording
  duration: PT2M1S
  duration ms: 121800
  explicit: false
  by artist: Cuarteto Leo
  in album: Las Bodas de Plata del Cuarteto Leo
    type: MusicAlbum
    date published: 1968-07-13
  genre: cuarteto
  isrc code: ARF109902196
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-03T10:45:43+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x37ed47ff037b5508444e05e3f118921cf7a822023e4bb02b0660a7cf5c34624b
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956545
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956545
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF109902196
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-03T19:59:51Z
  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 0x37ed47ff037b5508444e05e3f118921cf7a822023e4bb02b0660a7cf5c34624b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ARF109902196.
    date published: 2026-07-03T19:59:51Z
  audio: Se Quema el Rancho
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 169.343
    additional property: Musical Key
      type: PropertyValue
      value: 0
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 3
    additional property: Danceability
      type: PropertyValue
      value: 0.641
    additional property: Energy
      type: PropertyValue
      value: 0.754
    additional property: Speechiness
      type: PropertyValue
      value: 0.171
    additional property: Acousticness
      type: PropertyValue
      value: 0.661
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.057
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.894
    additional property: Loudness (dB)
      type: PropertyValue
      value: -4.239
    additional property: Key Name
      type: PropertyValue
      value: C
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: Besame Morenita
  type: MusicRecording
  duration: PT2M37S
  duration ms: 157933
  explicit: false
  by artist: Cuarteto Leo
  in album: Las Bodas de Plata del Cuarteto Leo
    type: MusicAlbum
    date published: 1968-07-13
  genre: cuarteto
  isrc code: ARF106800258
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-19T09:49:14+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xebe20f83896e33204295cbcdb6c4cd0e24d40971b5e9a1c7d3039717aeec4295
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958716
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958716
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF106800258
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-19T10:15:55Z
  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 0xebe20f83896e33204295cbcdb6c4cd0e24d40971b5e9a1c7d3039717aeec4295. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/ARF106800258.
    date published: 2026-07-19T10:15:55Z
  audio: Besame Morenita
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 133.753
    additional property: Musical Key
      type: PropertyValue
      value: 10
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.666
    additional property: Energy
      type: PropertyValue
      value: 0.699
    additional property: Speechiness
      type: PropertyValue
      value: 0.055
    additional property: Acousticness
      type: PropertyValue
      value: 0.576
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.36
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.847
    additional property: Loudness (dB)
      type: PropertyValue
      value: -3.454
    additional property: Key Name
      type: PropertyValue
      value: Bb
    additional property: Mode Name
      type: PropertyValue
      value: Major

A Gozar Con el Cuarteto Leo
type: MusicAlbum
date published: 1969-07-13

Leo por Acá, Leo por Allá
type: MusicAlbum
date published: 1969-07-13

Realmente el Único
type: MusicAlbum
date published: 1970-07-13
track: Idilio Trunco
  type: MusicRecording
  duration: PT2M53S
  duration ms: 173426
  explicit: false
  by artist: Cuarteto Leo
  in album: Realmente el Único
    type: MusicAlbum
    date published: 1970-07-13
  genre: cuarteto
  isrc code: ARF107000240
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-22T09:45:47+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x21d0d19c0410f88e306e1aa3a2b21a600832df76d17896cbff41b88db3fd118a
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 959118
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/959118
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF107000240
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-22T10:01:58Z
  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 0x21d0d19c0410f88e306e1aa3a2b21a600832df76d17896cbff41b88db3fd118a. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/ARF107000240.
    date published: 2026-07-22T10:01:58Z
  audio: Idilio Trunco
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 203.425
    additional property: Musical Key
      type: PropertyValue
      value: 0
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 3
    additional property: Danceability
      type: PropertyValue
      value: 0.446
    additional property: Energy
      type: PropertyValue
      value: 0.556
    additional property: Speechiness
      type: PropertyValue
      value: 0.09
    additional property: Acousticness
      type: PropertyValue
      value: 0.633
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.296
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.668
    additional property: Loudness (dB)
      type: PropertyValue
      value: -4.523
    additional property: Key Name
      type: PropertyValue
      value: C
    additional property: Mode Name
      type: PropertyValue
      value: Minor

La Vida Sigue Igual
type: MusicAlbum
date published: 1970-07-20
track: La Vida Sigue Igual
  type: MusicRecording
  duration: PT2M15S
  duration ms: 135813
  explicit: false
  by artist: Cuarteto Leo
  in album: La Vida Sigue Igual
    type: MusicAlbum
    date published: 1970-07-20
  genre: cuarteto
  isrc code: ARF109902184
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-05T21:59:36+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x714a05de08e91a74160d416ec84384d19c764d628d9cb00d71bd4eec6a830ea9
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956856
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956856
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF109902184
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-06T01:25:57Z
  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 0x714a05de08e91a74160d416ec84384d19c764d628d9cb00d71bd4eec6a830ea9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ARF109902184.
    date published: 2026-07-06T01:25:57Z
  audio: La Vida Sigue Igual
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 137.549
    additional property: Musical Key
      type: PropertyValue
      value: 0
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.657
    additional property: Energy
      type: PropertyValue
      value: 0.587
    additional property: Speechiness
      type: PropertyValue
      value: 0.041
    additional property: Acousticness
      type: PropertyValue
      value: 0.315
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.178
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.803
    additional property: Loudness (dB)
      type: PropertyValue
      value: -5.339
    additional property: Key Name
      type: PropertyValue
      value: C
    additional property: Mode Name
      type: PropertyValue
      value: Major

A Reir, a Bailar... y las Penas Olvidar
type: MusicAlbum
date published: 1971-07-20

¡Viva la Felicidad!
type: MusicAlbum
date published: 1971-07-20

Para Nuestro Público
type: MusicAlbum
date published: 1972-07-20

Alegrando el Corazón
type: MusicAlbum
date published: 1972-07-20
track: Noches de Miramar
  type: MusicRecording
  duration: PT2M41S
  duration ms: 161266
  explicit: false
  by artist: Cuarteto Leo
  in album: Alegrando el Corazón
    type: MusicAlbum
    date published: 1972-07-20
  genre: cuarteto
  isrc code: ARF107200342
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-03T23:10:56+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x3a8fd8c63d4ddc64d6fca54778baa2796f630c437833a493887a792d5daca527
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956639
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956639
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF107200342
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-04T11:19:20Z
  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 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 0x3a8fd8c63d4ddc64d6fca54778baa2796f630c437833a493887a792d5daca527. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ARF107200342.
    date published: 2026-07-04T11:19:20Z
  audio: Noches de Miramar
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 145.486
    additional property: Musical Key
      type: PropertyValue
      value: 9
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.649
    additional property: Energy
      type: PropertyValue
      value: 0.742
    additional property: Speechiness
      type: PropertyValue
      value: 0.033
    additional property: Acousticness
      type: PropertyValue
      value: 0.504
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.009
    additional property: Liveness
      type: PropertyValue
      value: 0.302
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.953
    additional property: Loudness (dB)
      type: PropertyValue
      value: -3.612
    additional property: Key Name
      type: PropertyValue
      value: A
    additional property: Mode Name
      type: PropertyValue
      value: Major

Todo Es Alegría y Cordialidad Con el Cuarteto Leo
type: MusicAlbum
date published: 1973-07-20

Con Tu Permiso... Aquí Está Leo, Rey de los Cuartetos
type: MusicAlbum
date published: 1973-07-20

Quien Le Pone el Cascabel a Leo?
type: MusicAlbum
date published: 1974-07-20

Llegó el Sucundín Con el Cuarteto Leo
type: MusicAlbum
date published: 1974-07-20

Rey y Señor de los Cuartetos
type: MusicAlbum
date published: 1975-07-20

Porque Te Quiero Así, Te Regalo el 31
type: MusicAlbum
date published: 1975-07-30

Con Su Estilo Famoso
type: MusicAlbum
date published: 1976-07-30

Dale Soga Nomás... Que Va el 33 del Cuarteto Leo
type: MusicAlbum
date published: 1976-07-30

34 Aniversario
type: MusicAlbum
date published: 1977-07-30

El Infalible... Cuarteto Leo y Su N° 35
type: MusicAlbum
date published: 1977-07-30

El Tiempo Pasa y Sigue el Cuarteto Leo
type: MusicAlbum
date published: 1978-07-30

Aquí Está el Rey de la Alegría
type: MusicAlbum
date published: 1978-07-30

Saldré a Buscar el Amor
type: MusicAlbum
date published: 1979-07-30

Los Más Grandes Éxitos del Cuarteto Leo
type: MusicAlbum
date published: 1979-07-30
track: Gira Mi Corazón
  type: MusicRecording
  duration: PT3M2S
  duration ms: 182160
  explicit: false
  by artist: Cuarteto Leo
  in album: Los Más Grandes Éxitos del Cuarteto Leo
    type: MusicAlbum
    date published: 1979-07-30
  genre: cuarteto
  isrc code: ARF107900124
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-05T22:11:00+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xfcc4f147a366fa9955c42c51d10a288432a8a00bed0a8a69ec7d4e5774eea13c
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956856
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956856
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF107900124
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-06T01:25:57Z
  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 0xfcc4f147a366fa9955c42c51d10a288432a8a00bed0a8a69ec7d4e5774eea13c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ARF107900124.
    date published: 2026-07-06T01:25:57Z
  audio: Gira Mi Corazón
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 153.431
    additional property: Musical Key
      type: PropertyValue
      value: 4
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.611
    additional property: Energy
      type: PropertyValue
      value: 0.722
    additional property: Speechiness
      type: PropertyValue
      value: 0.033
    additional property: Acousticness
      type: PropertyValue
      value: 0.339
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.334
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.969
    additional property: Loudness (dB)
      type: PropertyValue
      value: -5.486
    additional property: Key Name
      type: PropertyValue
      value: E
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: Ponele el Cascabel
  type: MusicRecording
  duration: PT2M30S
  duration ms: 150306
  explicit: false
  by artist: Cuarteto Leo
  in album: Los Más Grandes Éxitos del Cuarteto Leo
    type: MusicAlbum
    date published: 1979-07-30
  genre: cuarteto
  isrc code: ARF107900126
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-04T16:14:08+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x76333bc655257cec1fed9ffeff9a455cd53940a175e4426260863820508b8331
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956725
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956725
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF107900126
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-05T01:12:41Z
  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 0x76333bc655257cec1fed9ffeff9a455cd53940a175e4426260863820508b8331. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ARF107900126.
    date published: 2026-07-05T01:12:41Z
  audio: Ponele el Cascabel
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 79.703
    additional property: Musical Key
      type: PropertyValue
      value: 4
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.651
    additional property: Energy
      type: PropertyValue
      value: 0.729
    additional property: Speechiness
      type: PropertyValue
      value: 0.053
    additional property: Acousticness
      type: PropertyValue
      value: 0.34
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.126
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.9
    additional property: Loudness (dB)
      type: PropertyValue
      value: -6.326
    additional property: Key Name
      type: PropertyValue
      value: E
    additional property: Mode Name
      type: PropertyValue
      value: Major

Vivir Así Feliz Con el Cuarteto Leo
type: MusicAlbum
date published: 1980-07-30

Mi Vida Quiero Vivir Bailando Con el Cuarteto Leo
type: MusicAlbum
date published: 1980-08-03

Sigue Sonriendo Con el Cuarteto Leo
type: MusicAlbum
date published: 1981-08-03

Mentira, No Hay Drama... Con el Cuarteto Leo
type: MusicAlbum
date published: 1981-08-03

Te Pido Que Me Guíes Con el Cuarteto Leo
type: MusicAlbum
date published: 1982-08-03

Toda una Vida Con el Cuarteto Leo
type: MusicAlbum
date published: 1982-08-03

Quieres Tú, Quiero Yo al Feliz Cuarteto Leo
type: MusicAlbum
date published: 1983-08-03

A Toda Marcha Con el Cuarteto Leo
type: MusicAlbum
date published: 1983-08-03

Simplemente... el Mejor
type: MusicAlbum
date published: 1984-08-03

Ponele la Firma... Que Va a Andar el Cuarteto Leo
type: MusicAlbum
date published: 1984-08-03

La Descose Con el N° 50
type: MusicAlbum
date published: 1985-09-14

Empieza Con P...
type: MusicAlbum
date published: 1986-09-14

Cuarteto Leo y Doble Cuarteto
type: MusicAlbum
date published: 1990-07-04

Los Esenciales
type: MusicAlbum
date published: 2004-05-04

14 De Colección
type: MusicAlbum
date published: 2008-07-01

Los Elegidos: Cuarteto Leo
type: MusicAlbum
date published: 2009-07-18

Lo Nuevo
type: MusicAlbum
date published: 2014-11-03