Pedro Laurenz
type: MusicGroup
genre: tango
description: thumb|Pedro Laurenz Pedro Laurenz (born Pedro Blanco Acosta) was a bandoneon player, director and composer of Argentine tango music. He was born on October 10, 1902, and died on July 7, 1972. Pedro
popularity: 29
followers: 6668
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/4669687a-7022-4a32-93c9-e91a1caec607.ots
additional property: OTSRecordURL
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSCanonicalRecord
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additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin 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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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b7982326356e115331b6878dacb89bebc8c4d847f481ebfeae2318516d5630. 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/4669687a-7022-4a32-93c9-e91a1caec607.json and https://artists.proofprofile.net/proofs/artist/4669687a-7022-4a32-93c9-e91a1caec607.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-12T19:24:56Z
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album: Milonga de Mis Amores
  type: MusicAlbum
  date published: 1924-02-14
  track: Que Nunca Me Falte
    type: MusicRecording
    duration: PT2M47S
    duration ms: 167933
    explicit: false
    by artist: Pedro Laurenz
    in album: Milonga de Mis Amores
      type: MusicAlbum
      date published: 1924-02-14
    genre: tango
    isrc code: DEUE22511624
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    additional property: OTSVerificationAPI
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      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEUE22511624
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-15T23:24:33Z
    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
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      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9226679015807924d70de7fadfd24242078682bb9133257b0280d02eda7712d9. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEUE22511624 — a six-check JSON result.
      date published: 2026-07-15T23:24:33Z
    audio: Que Nunca Me Falte
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      additional property: Mode (Major/Minor)
        type: PropertyValue
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      additional property: Time Signature
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      additional property: Danceability
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      additional property: Energy
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      additional property: Speechiness
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      additional property: Acousticness
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      additional property: Liveness
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      additional property: Valence (Positivity)
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      additional property: Loudness (dB)
        type: PropertyValue
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      additional property: Mode Name
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  track: La Vida Es Una Milonga
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    by artist: Pedro Laurenz
    in album: Milonga de Mis Amores
      type: MusicAlbum
      date published: 1924-02-14
    genre: tango
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    additional property: OTSVerificationAPI
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    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-02T21:01:51Z
    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 0xb42a8e1d419c2bc0ddf6ad8c9720d3cf449a3ac5a353d67b8edb8b58db4e3817. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEUE22511625 — a six-check JSON result.
      date published: 2026-07-02T21:01:51Z
    audio: La Vida Es Una Milonga
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 109.151
      additional property: Musical Key
        type: PropertyValue
        value: 5
      additional property: Mode (Major/Minor)
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        value: 0
      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
        type: PropertyValue
        value: 0.041
      additional property: Acousticness
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      additional property: Instrumentalness
        type: PropertyValue
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      additional property: Liveness
        type: PropertyValue
        value: 0.396
      additional property: Valence (Positivity)
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name
  track: Todo
  track: Paisaje
  track: Recién
  track: Garúa
  track: Milonga De Mis Amores
  track: Caserón
  track: Como Dos Extraños
  track: Llueve Otra Vez
  track: No Me Extraña
  track: Al Verla Pasar
  track: Yo Quiero Cantar Un Tango
  track: De Puro Guapo
album: Presentando a Pedro Laurenz
album: Milonga (Remastered 2024)
album: Pedro Laurenz Interpreta a Pedro Laurenz
album: Serie 78 RPM: Orquestas De Antaño - Pedro Laurenz
album: Que Nunca Me Falte
album: The Roots Of Tango - Abandono
album: The Masters of Tango: Pedro Laurenz, Patria Mía
album: Tango: El Inolvidable
album: Hits by Pedro Laurenz
album: De Puro Guapo
album: Mococita
album: 1937-1943
album: Mala Junta
album: Alma de Bohemio
album: Arrabal
album: Paisaje
album: No Me Extrana
album: Mascarita
album: Todo
album: Amurado (Historical Recordings)
album: Desconsuelo (Historical Recordings)
album: La Madrugada (Historical Recordings)
album: Latin Salsa: Best Of Pedro Laurenz
album: World's Novelty Champions: Pedro Laurenz
album: Firuletear de Bandoneón
album: Greatest Songs
album: Ars Moderna
album: Valses y Milongas
album: Milonga de Mis Amores. Pedro Laurenz con Su Orquesta Típica 1937-1944
album: Milonga de mis amores
album: Bandoneón Master
album: Mi Ultimo Tango
track: Amurado
track: Mal de amores
track: Temblando
track: Mala junta

Valence (Positivity)
type: PropertyValue
value: 0.911

Loudness (dB)
type: PropertyValue
value: -4.532

Key Name
type: PropertyValue
value: F

Mode Name
type: PropertyValue
value: Minor

Todo
type: MusicRecording
duration: PT2M35S
duration ms: 155240
explicit: false
by artist: Pedro Laurenz
in album: Milonga de Mis Amores
  type: MusicAlbum
  date published: 1924-02-14
genre: tango
isrc code: DEUE22511627
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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  value: 2026-07-11T11:14:07Z
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 0xba208d142e00164c3301c74972a041a3fb6570b199fca811d37b7b6e742ded7f. Chain 2 (Bitcoin): anchored in block 957556 (2026-07-11T11:14:07Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEUE22511627 — a six-check JSON result.
  date published: 2026-07-11T11:14:07Z
audio: Todo
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  additional property: Tempo (BPM)
    type: PropertyValue
    value: 127.968
  additional property: Musical Key
    type: PropertyValue
    value: 7
  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
    type: PropertyValue
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  additional property: Speechiness
    type: PropertyValue
    value: 0.046
  additional property: Acousticness
    type: PropertyValue
    value: 0.975
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.117
  additional property: Liveness
    type: PropertyValue
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  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.602
  additional property: Loudness (dB)
    type: PropertyValue
    value: -7.029
  additional property: Key Name
    type: PropertyValue
    value: G
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Paisaje
type: MusicRecording
duration: PT2M51S
duration ms: 171133
explicit: false
by artist: Pedro Laurenz
in album: Milonga de Mis Amores
  type: MusicAlbum
  date published: 1924-02-14
genre: tango
isrc code: DEUE22511628
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
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additional property: OTSVerificationAPI
  type: PropertyValue
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additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-15T12:00:27Z
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 0xce4ef7ff9094bf56ffc548595515a23b48da2e6ee6415af137a34558fe69d4a7. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEUE22511628 — a six-check JSON result.
  date published: 2026-07-15T12:00:27Z
audio: Paisaje
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  additional property: Tempo (BPM)
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  additional property: Musical Key
    type: PropertyValue
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  additional property: Mode (Major/Minor)
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  additional property: Time Signature
    type: PropertyValue
    value: 3
  additional property: Danceability
    type: PropertyValue
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  additional property: Energy
    type: PropertyValue
    value: 0.407
  additional property: Speechiness
    type: PropertyValue
    value: 0.035
  additional property: Acousticness
    type: PropertyValue
    value: 0.971
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.017
  additional property: Liveness
    type: PropertyValue
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
    type: PropertyValue
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  additional property: Key Name
    type: PropertyValue
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  additional property: Mode Name
    type: PropertyValue
    value: Major

Recién
type: MusicRecording
duration: PT2M41S
duration ms: 161000
explicit: false
by artist: Pedro Laurenz
in album: Milonga de Mis Amores
  type: MusicAlbum
  date published: 1924-02-14
genre: tango
isrc code: DEUE22511629
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x70c80227b4c02a80dbddb2c66f06af3214ab1df7a143a1382498e4770c6c30b6
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958058
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/958058
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEUE22511629
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-14T20:20:34Z
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 0x70c80227b4c02a80dbddb2c66f06af3214ab1df7a143a1382498e4770c6c30b6. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEUE22511629 — a six-check JSON result.
  date published: 2026-07-14T20:20:34Z
audio: Recién
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 121.675
  additional property: Musical Key
    type: PropertyValue
    value: 0
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.557
  additional property: Energy
    type: PropertyValue
    value: 0.278
  additional property: Speechiness
    type: PropertyValue
    value: 0.039
  additional property: Acousticness
    type: PropertyValue
    value: 0.978
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.875
  additional property: Liveness
    type: PropertyValue
    value: 0.166
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.659
  additional property: Loudness (dB)
    type: PropertyValue
    value: -8.012
  additional property: Key Name
    type: PropertyValue
    value: C
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Garúa
type: MusicRecording
duration: PT3M9S
duration ms: 189120
explicit: false
by artist: Pedro Laurenz
in album: Milonga de Mis Amores
  type: MusicAlbum
  date published: 1924-02-14
genre: tango
isrc code: DEUE22511630
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-14T19:18:15+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x39a9cdfb2481df854ea821c0890d73c624b7b17a8b73974e7ff698874fe7854b
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958054
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/958054
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEUE22511630
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-14T19:33:24Z
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 0x39a9cdfb2481df854ea821c0890d73c624b7b17a8b73974e7ff698874fe7854b. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEUE22511630 — a six-check JSON result.
  date published: 2026-07-14T19:33:24Z
audio: Garúa
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 121.824
  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: 0.612
  additional property: Energy
    type: PropertyValue
    value: 0.277
  additional property: Speechiness
    type: PropertyValue
    value: 0.046
  additional property: Acousticness
    type: PropertyValue
    value: 0.98
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.216
  additional property: Liveness
    type: PropertyValue
    value: 0.15
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.724
  additional property: Loudness (dB)
    type: PropertyValue
    value: -8.057
  additional property: Key Name
    type: PropertyValue
    value: E
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Milonga De Mis Amores
type: MusicRecording
duration: PT2M26S
duration ms: 146840
explicit: false
by artist: Pedro Laurenz
in album: Milonga de Mis Amores
  type: MusicAlbum
  date published: 1924-02-14
genre: tango
isrc code: DEUE22511631
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-21T15:43:22+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x120569b8ec330aa1765b0f4f2b9f497d0dff857ab37d22bca1c618cc559986ff
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 959031
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/959031
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEUE22511631
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-21T16:15:11Z
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 0x120569b8ec330aa1765b0f4f2b9f497d0dff857ab37d22bca1c618cc559986ff. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEUE22511631 — a six-check JSON result.
  date published: 2026-07-21T16:15:11Z
audio: Milonga De Mis Amores
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 104.044
  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: 0.673
  additional property: Energy
    type: PropertyValue
    value: 0.345
  additional property: Speechiness
    type: PropertyValue
    value: 0.046
  additional property: Acousticness
    type: PropertyValue
    value: 0.962
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.907
  additional property: Liveness
    type: PropertyValue
    value: 0.233
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.817
  additional property: Loudness (dB)
    type: PropertyValue
    value: -6.833
  additional property: Key Name
    type: PropertyValue
    value: E
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Caserón
type: MusicRecording
duration: PT2M43S
duration ms: 163653
explicit: false
by artist: Pedro Laurenz
in album: Milonga de Mis Amores
  type: MusicAlbum
  date published: 1924-02-14
genre: tango
isrc code: DEUE22511634
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-18T21:16:07+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x522db83a247e6cefaa2c19378e79d7afa9444625f68ea72936563c58860eb04f
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958611
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/958611
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEUE22511634
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-18T21:24:44Z
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 0x522db83a247e6cefaa2c19378e79d7afa9444625f68ea72936563c58860eb04f. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEUE22511634 — a six-check JSON result.
  date published: 2026-07-18T21:24:44Z
audio: Caserón
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 67.502
  additional property: Musical Key
    type: PropertyValue
    value: 9
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.433
  additional property: Energy
    type: PropertyValue
    value: 0.421
  additional property: Speechiness
    type: PropertyValue
    value: 0.061
  additional property: Acousticness
    type: PropertyValue
    value: 0.983
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.016
  additional property: Liveness
    type: PropertyValue
    value: 0.29
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.694
  additional property: Loudness (dB)
    type: PropertyValue
    value: -8.491
  additional property: Key Name
    type: PropertyValue
    value: A
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Como Dos Extraños
type: MusicRecording
duration: PT2M28S
duration ms: 148546
explicit: false
by artist: Pedro Laurenz
in album: Milonga de Mis Amores
  type: MusicAlbum
  date published: 1924-02-14
genre: tango
isrc code: DEUE22511635
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-04T19:53:32+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x38703b39b7abef4f40f4b1fdf0654d53a39bbaaee682922ea7e9ae494a8622aa
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/DEUE22511635
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 0x38703b39b7abef4f40f4b1fdf0654d53a39bbaaee682922ea7e9ae494a8622aa. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEUE22511635 — a six-check JSON result.
  date published: 2026-07-05T01:12:41Z
audio: Como Dos Extraños
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 132.194
  additional property: Musical Key
    type: PropertyValue
    value: 5
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.573
  additional property: Energy
    type: PropertyValue
    value: 0.357
  additional property: Speechiness
    type: PropertyValue
    value: 0.065
  additional property: Acousticness
    type: PropertyValue
    value: 0.982
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.388
  additional property: Liveness
    type: PropertyValue
    value: 0.437
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.892
  additional property: Loudness (dB)
    type: PropertyValue
    value: -11.858
  additional property: Key Name
    type: PropertyValue
    value: F
  additional property: Mode Name
    type: PropertyValue
    value: Major

Llueve Otra Vez
type: MusicRecording
duration: PT2M52S
duration ms: 172346
explicit: false
by artist: Pedro Laurenz
in album: Milonga de Mis Amores
  type: MusicAlbum
  date published: 1924-02-14
genre: tango
isrc code: DEUE22511638
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-19T19:35:34+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xce3ac963b42923c4081f8e32baac8a58f0f8a0cc06ac2b2f4f0f420739a8b1cc
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958774
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/958774
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEUE22511638
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-19T20:03:27Z
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 0xce3ac963b42923c4081f8e32baac8a58f0f8a0cc06ac2b2f4f0f420739a8b1cc. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEUE22511638 — a six-check JSON result.
  date published: 2026-07-19T20:03:27Z
audio: Llueve Otra Vez
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 119.164
  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: 0.635
  additional property: Energy
    type: PropertyValue
    value: 0.275
  additional property: Speechiness
    type: PropertyValue
    value: 0.038
  additional property: Acousticness
    type: PropertyValue
    value: 0.975
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.107
  additional property: Liveness
    type: PropertyValue
    value: 0.115
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.341
  additional property: Loudness (dB)
    type: PropertyValue
    value: -7.237
  additional property: Key Name
    type: PropertyValue
    value: D
  additional property: Mode Name
    type: PropertyValue
    value: Major

No Me Extraña
type: MusicRecording
duration: PT2M43S
duration ms: 163173
explicit: false
by artist: Pedro Laurenz
in album: Milonga de Mis Amores
  type: MusicAlbum
  date published: 1924-02-14
genre: tango
isrc code: DEUE22511648
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-20T22:34:56+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x824a7e7d02b26c5c870178559cf0c2db78b71975737a65a3d7ab7d4de64d5dd9
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958942
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/958942
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEUE22511648
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-21T00:24:07Z
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 0x824a7e7d02b26c5c870178559cf0c2db78b71975737a65a3d7ab7d4de64d5dd9. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEUE22511648 — a six-check JSON result.
  date published: 2026-07-21T00:24:07Z
audio: No Me Extraña
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 108.057
  additional property: Musical Key
    type: PropertyValue
    value: 0
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.645
  additional property: Energy
    type: PropertyValue
    value: 0.305
  additional property: Speechiness
    type: PropertyValue
    value: 0.05
  additional property: Acousticness
    type: PropertyValue
    value: 0.995
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.832
  additional property: Liveness
    type: PropertyValue
    value: 0.23
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.904
  additional property: Loudness (dB)
    type: PropertyValue
    value: -15.91
  additional property: Key Name
    type: PropertyValue
    value: C
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Al Verla Pasar
type: MusicRecording
duration: PT3M24S
duration ms: 204280
explicit: false
by artist: Pedro Laurenz
in album: Milonga de Mis Amores
  type: MusicAlbum
  date published: 1924-02-14
genre: tango
isrc code: DEUE22511649
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-21T02:20:43+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xe068b44a5b0070ff4f13702711b8cf5ff212df761618eb7c6dcc8b9e103fcd50
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958955
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/958955
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEUE22511649
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-21T03:03:40Z
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 0xe068b44a5b0070ff4f13702711b8cf5ff212df761618eb7c6dcc8b9e103fcd50. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEUE22511649 — a six-check JSON result.
  date published: 2026-07-21T03:03:40Z
audio: Al Verla Pasar
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 121.47
  additional property: Musical Key
    type: PropertyValue
    value: 0
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.594
  additional property: Energy
    type: PropertyValue
    value: 0.321
  additional property: Speechiness
    type: PropertyValue
    value: 0.048
  additional property: Acousticness
    type: PropertyValue
    value: 0.985
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.03
  additional property: Liveness
    type: PropertyValue
    value: 0.093
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.356
  additional property: Loudness (dB)
    type: PropertyValue
    value: -8.904
  additional property: Key Name
    type: PropertyValue
    value: C
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Yo Quiero Cantar Un Tango
type: MusicRecording
duration: PT3M4S
duration ms: 184533
explicit: false
by artist: Pedro Laurenz
in album: Milonga de Mis Amores
  type: MusicAlbum
  date published: 1924-02-14
genre: tango
isrc code: DEUE22511663
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-11T10:53:46+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xc61787e25f6fcb77b7e544860855213ef07b0d0624d4ec395bd9c768daf61f3f
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 957556
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957556
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEUE22511663
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-11T11:14:07Z
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 0xc61787e25f6fcb77b7e544860855213ef07b0d0624d4ec395bd9c768daf61f3f. Chain 2 (Bitcoin): anchored in block 957556 (2026-07-11T11:14:07Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEUE22511663 — a six-check JSON result.
  date published: 2026-07-11T11:14:07Z
audio: Yo Quiero Cantar Un Tango
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 122.48
  additional property: Musical Key
    type: PropertyValue
    value: 11
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.621
  additional property: Energy
    type: PropertyValue
    value: 0.291
  additional property: Speechiness
    type: PropertyValue
    value: 0.043
  additional property: Acousticness
    type: PropertyValue
    value: 0.979
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.438
  additional property: Liveness
    type: PropertyValue
    value: 0.205
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.753
  additional property: Loudness (dB)
    type: PropertyValue
    value: -7.099
  additional property: Key Name
    type: PropertyValue
    value: B
  additional property: Mode Name
    type: PropertyValue
    value: Minor

De Puro Guapo
type: MusicRecording
duration: PT2M45S
duration ms: 165881
explicit: false
by artist: Pedro Laurenz
in album: Milonga de Mis Amores
  type: MusicAlbum
  date published: 1924-02-14
genre: tango
isrc code: DEUE22511669
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-18T08:15:00+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xb83afc49a847af9574b8d69b294fe5b4b5877cf56c634d490334464832b20635
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958523
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/958523
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEUE22511669
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-18T08:54:12Z
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 0xb83afc49a847af9574b8d69b294fe5b4b5877cf56c634d490334464832b20635. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEUE22511669 — a six-check JSON result.
  date published: 2026-07-18T08:54:12Z
audio: De Puro Guapo
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 135.441
  additional property: Musical Key
    type: PropertyValue
    value: 0
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.774
  additional property: Energy
    type: PropertyValue
    value: 0.208
  additional property: Speechiness
    type: PropertyValue
    value: 0.088
  additional property: Acousticness
    type: PropertyValue
    value: 0.964
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.363
  additional property: Liveness
    type: PropertyValue
    value: 0.168
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.667
  additional property: Loudness (dB)
    type: PropertyValue
    value: -11.869
  additional property: Key Name
    type: PropertyValue
    value: C
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Presentando a Pedro Laurenz
type: MusicAlbum
date published: 1925-02-25
track: Que Nunca Me Falte
  type: MusicRecording
  duration: PT2M47S
  duration ms: 167933
  explicit: false
  by artist: Pedro Laurenz
  in album: Presentando a Pedro Laurenz
    type: MusicAlbum
    date published: 1925-02-25
  genre: tango
  isrc code: DEXN92230941
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-17T15:43:17+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x80d686fb4b5df176a94a3493dda214e70267e0effc367c6d3d06702b54762a49
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958436
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958436
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXN92230941
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-17T16:42:22Z
  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 0x80d686fb4b5df176a94a3493dda214e70267e0effc367c6d3d06702b54762a49. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXN92230941 — a six-check JSON result.
    date published: 2026-07-17T16:42:22Z
  audio: Que Nunca Me Falte
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 122.464
    additional property: Musical Key
      type: PropertyValue
      value: 2
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.742
    additional property: Energy
      type: PropertyValue
      value: 0.214
    additional property: Speechiness
      type: PropertyValue
      value: 0.096
    additional property: Acousticness
      type: PropertyValue
      value: 0.957
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.655
    additional property: Liveness
      type: PropertyValue
      value: 0.298
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.845
    additional property: Loudness (dB)
      type: PropertyValue
      value: -12.516
    additional property: Key Name
      type: PropertyValue
      value: D
    additional property: Mode Name
      type: PropertyValue
      value: Minor
track: La Vida Es una Milonga
  type: MusicRecording
  duration: PT2M24S
  duration ms: 144893
  explicit: false
  by artist: Pedro Laurenz
  in album: Presentando a Pedro Laurenz
    type: MusicAlbum
    date published: 1925-02-25
  genre: tango
  isrc code: DEXN92230942
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-04T08:13:35+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x46a2241576246b426a8775c6f563ee10e32d1db12aef1f231098bd1be1d5555f
  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/DEXN92230942
  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 0x46a2241576246b426a8775c6f563ee10e32d1db12aef1f231098bd1be1d5555f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXN92230942 — a six-check JSON result.
    date published: 2026-07-04T11:19:20Z
  audio: La Vida Es una Milonga
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 109.153
    additional property: Musical Key
      type: PropertyValue
      value: 5
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.742
    additional property: Energy
      type: PropertyValue
      value: 0.468
    additional property: Speechiness
      type: PropertyValue
      value: 0.041
    additional property: Acousticness
      type: PropertyValue
      value: 0.963
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.022
    additional property: Liveness
      type: PropertyValue
      value: 0.396
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.911
    additional property: Loudness (dB)
      type: PropertyValue
      value: -4.532
    additional property: Key Name
      type: PropertyValue
      value: F
    additional property: Mode Name
      type: PropertyValue
      value: Minor
track: Todo
  type: MusicRecording
  duration: PT2M35S
  duration ms: 155240
  explicit: false
  by artist: Pedro Laurenz
  in album: Presentando a Pedro Laurenz
    type: MusicAlbum
    date published: 1925-02-25
  genre: tango
  isrc code: DEXN92230944
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-03T21:40:50+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x0f716a2fe32d2fe330e18e7dbacbc03ea6e09781dfb6bb45caf6599af68d94d9
  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
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: Todo
track: Paisaje
track: Recién
track: Garúa
track: Milonga de Mis Amores

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXN92230944

OTSTimestamp
type: PropertyValue
value: 2026-07-04T10:04:33Z

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 0x0f716a2fe32d2fe330e18e7dbacbc03ea6e09781dfb6bb45caf6599af68d94d9. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXN92230944 — a six-check JSON result.
date published: 2026-07-04T10:04:33Z

Todo
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 127.968
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: 0.597
additional property: Energy
  type: PropertyValue
  value: 0.394
additional property: Speechiness
  type: PropertyValue
  value: 0.046
additional property: Acousticness
  type: PropertyValue
  value: 0.975
additional property: Instrumentalness
  type: PropertyValue
  value: 0.117
additional property: Liveness
  type: PropertyValue
  value: 0.151
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.602
additional property: Loudness (dB)
  type: PropertyValue
  value: -7.029
additional property: Key Name
  type: PropertyValue
  value: G
additional property: Mode Name
  type: PropertyValue
  value: Minor

Paisaje
type: MusicRecording
duration: PT2M51S
duration ms: 171133
explicit: false
by artist: Pedro Laurenz
in album: Presentando a Pedro Laurenz
  type: MusicAlbum
  date published: 1925-02-25
genre: tango
isrc code: DEXN92230945
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-18T10:27:23+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x7a1ac38f0f7e371a32aede5a31626664a89a9b504636e3b7e0e31a67a370f822
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958541
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/958541
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXN92230945
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-18T11:37:54Z
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 0x7a1ac38f0f7e371a32aede5a31626664a89a9b504636e3b7e0e31a67a370f822. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXN92230945 — a six-check JSON result.
  date published: 2026-07-18T11:37:54Z
audio: Paisaje
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 104.805
  additional property: Musical Key
    type: PropertyValue
    value: 9
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 3
  additional property: Danceability
    type: PropertyValue
    value: 0.695
  additional property: Energy
    type: PropertyValue
    value: 0.407
  additional property: Speechiness
    type: PropertyValue
    value: 0.035
  additional property: Acousticness
    type: PropertyValue
    value: 0.971
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.017
  additional property: Liveness
    type: PropertyValue
    value: 0.308
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.86
  additional property: Loudness (dB)
    type: PropertyValue
    value: -6.246
  additional property: Key Name
    type: PropertyValue
    value: A
  additional property: Mode Name
    type: PropertyValue
    value: Major

Recién
type: MusicRecording
duration: PT2M41S
duration ms: 161000
explicit: false
by artist: Pedro Laurenz
in album: Presentando a Pedro Laurenz
  type: MusicAlbum
  date published: 1925-02-25
genre: tango
isrc code: DEXN92230946
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-16T22:31:20+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xa7dde76e2902a9af11c2de0966dbd852ab3c92e769a1a3deb0f63285124260db
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958340
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/958340
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXN92230946
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-17T00:53:26Z
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 0xa7dde76e2902a9af11c2de0966dbd852ab3c92e769a1a3deb0f63285124260db. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXN92230946 — a six-check JSON result.
  date published: 2026-07-17T00:53:26Z
audio: Recién
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 121.675
  additional property: Musical Key
    type: PropertyValue
    value: 0
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.557
  additional property: Energy
    type: PropertyValue
    value: 0.278
  additional property: Speechiness
    type: PropertyValue
    value: 0.039
  additional property: Acousticness
    type: PropertyValue
    value: 0.978
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.875
  additional property: Liveness
    type: PropertyValue
    value: 0.166
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.659
  additional property: Loudness (dB)
    type: PropertyValue
    value: -8.012
  additional property: Key Name
    type: PropertyValue
    value: C
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Garúa
type: MusicRecording
duration: PT3M9S
duration ms: 189120
explicit: false
by artist: Pedro Laurenz
in album: Presentando a Pedro Laurenz
  type: MusicAlbum
  date published: 1925-02-25
genre: tango
isrc code: DEXN92230947
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-04T08:05:44+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x1120ad8b0846ace979bfef9aed355f34433f7f40c63ceefda11dcf0c5f84bb4b
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/DEXN92230947
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 0x1120ad8b0846ace979bfef9aed355f34433f7f40c63ceefda11dcf0c5f84bb4b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXN92230947 — a six-check JSON result.
  date published: 2026-07-04T10:04:33Z
audio: Garúa
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 121.822
  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: 0.612
  additional property: Energy
    type: PropertyValue
    value: 0.277
  additional property: Speechiness
    type: PropertyValue
    value: 0.046
  additional property: Acousticness
    type: PropertyValue
    value: 0.98
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.216
  additional property: Liveness
    type: PropertyValue
    value: 0.15
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.724
  additional property: Loudness (dB)
    type: PropertyValue
    value: -8.057
  additional property: Key Name
    type: PropertyValue
    value: E
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Milonga de Mis Amores
type: MusicRecording
duration: PT2M26S
duration ms: 146840
explicit: false
by artist: Pedro Laurenz
in album: Presentando a Pedro Laurenz
  type: MusicAlbum
  date published: 1925-02-25
genre: tango
isrc code: DEXN92230948
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-22T02:25:43+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x97290e0bd374932bf22ee37a3e7477b9ad1712d579b5d6288e62838ac65889dc
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 959091
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/959091
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXN92230948
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-22T02:33:54Z
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 0x97290e0bd374932bf22ee37a3e7477b9ad1712d579b5d6288e62838ac65889dc. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T02:33:54Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXN92230948 — a six-check JSON result.
  date published: 2026-07-22T02:33:54Z
audio: Milonga de Mis Amores
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 104.044
  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: 0.673
  additional property: Energy
    type: PropertyValue
    value: 0.345
  additional property: Speechiness
    type: PropertyValue
    value: 0.046
  additional property: Acousticness
    type: PropertyValue
    value: 0.962
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.907
  additional property: Liveness
    type: PropertyValue
    value: 0.233
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.817
  additional property: Loudness (dB)
    type: PropertyValue
    value: -6.833
  additional property: Key Name
    type: PropertyValue
    value: E
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Milonga (Remastered 2024)
type: MusicAlbum
date published: 1942-09-10

Pedro Laurenz Interpreta a Pedro Laurenz
type: MusicAlbum
date published: 1969

Serie 78 RPM: Orquestas De Antaño - Pedro Laurenz
type: MusicAlbum
date published: 2004-07-15
track: Abandono
  type: MusicRecording
  duration: PT2M30S
  duration ms: 150946
  explicit: false
  by artist: Pedro Laurenz
  in album: Serie 78 RPM: Orquestas De Antaño - Pedro Laurenz
    type: MusicAlbum
    date published: 2004-07-15
  genre: tango
  isrc code: ARF039500051
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-08-01T00:08:38+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x16f388fea7122fba1934d129277d6641584895611e765b1a976bffadd754d12f
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 960487
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/960487
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF039500051
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-08-01T00:15:43Z
  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 0x16f388fea7122fba1934d129277d6641584895611e765b1a976bffadd754d12f. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF039500051 — a six-check JSON result.
    date published: 2026-08-01T00:15:43Z
  audio: Abandono
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 137.506
    additional property: Musical Key
      type: PropertyValue
      value: 6
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.632
    additional property: Energy
      type: PropertyValue
      value: 0.386
    additional property: Speechiness
      type: PropertyValue
      value: 0.046
    additional property: Acousticness
      type: PropertyValue
      value: 0.957
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.284
    additional property: Liveness
      type: PropertyValue
      value: 0.314
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.85
    additional property: Loudness (dB)
      type: PropertyValue
      value: -8.418
    additional property: Key Name
      type: PropertyValue
      value: F#
    additional property: Mode Name
      type: PropertyValue
      value: Minor
track: De Puro Guapo
  type: MusicRecording
  duration: PT2M45S
  duration ms: 165333
  explicit: false
  by artist: Pedro Laurenz
  in album: Serie 78 RPM: Orquestas De Antaño - Pedro Laurenz
    type: MusicAlbum
    date published: 2004-07-15
  genre: tango
  isrc code: ARF034000032
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-07T23:54:53+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xd397bb1849e4ba8b1c7cd746d2d4b5423325b513b4d22ef785f1420eaab3ffc2
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 957120
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/957120
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF034000032
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-08T03:22:41Z
  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 0xd397bb1849e4ba8b1c7cd746d2d4b5423325b513b4d22ef785f1420eaab3ffc2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF034000032 — a six-check JSON result.
    date published: 2026-07-08T03:22:41Z
  audio: De Puro Guapo
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 141.203
    additional property: Musical Key
      type: PropertyValue
      value: 0
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.751
    additional property: Energy
      type: PropertyValue
      value: 0.319
    additional property: Speechiness
      type: PropertyValue
      value: 0.057
    additional property: Acousticness
      type: PropertyValue
      value: 0.971
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.045
    additional property: Liveness
      type: PropertyValue
      value: 0.151
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.689
    additional property: Loudness (dB)
      type: PropertyValue
      value: -9.819
    additional property: Key Name
      type: PropertyValue
      value: C
    additional property: Mode Name
      type: PropertyValue
      value: Minor
track: No Me Extraña
  type: MusicRecording
  duration: PT2M42S
  duration ms: 162480
  explicit: false
  by artist: Pedro Laurenz
  in album: Serie 78 RPM: Orquestas De Antaño - Pedro Laurenz
    type: MusicAlbum
    date published: 2004-07-15
  genre: tango
  isrc code: ARF034000033
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-07T23:33:30+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x69d39c5ced826e29a5def7a13dbec06297a94af9314f9a2a9a84f2f329a5db2e
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 957120
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/957120
  additional property: OTSVerificationAPI
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: No Me Extraña
track: Mascarita
track: Amurado
track: Maria Remedios

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF034000033

OTSTimestamp
type: PropertyValue
value: 2026-07-08T03:22:41Z

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 0x69d39c5ced826e29a5def7a13dbec06297a94af9314f9a2a9a84f2f329a5db2e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF034000033 — a six-check JSON result.
date published: 2026-07-08T03:22:41Z

No Me Extraña
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 140.486
additional property: Musical Key
  type: PropertyValue
  value: 2
additional property: Mode (Major/Minor)
  type: PropertyValue
  value: 0
additional property: Time Signature
  type: PropertyValue
  value: 5
additional property: Danceability
  type: PropertyValue
  value: 0.602
additional property: Energy
  type: PropertyValue
  value: 0.401
additional property: Speechiness
  type: PropertyValue
  value: 0.04
additional property: Acousticness
  type: PropertyValue
  value: 0.98
additional property: Instrumentalness
  type: PropertyValue
  value: 0.428
additional property: Liveness
  type: PropertyValue
  value: 0.242
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.899
additional property: Loudness (dB)
  type: PropertyValue
  value: -10.782
additional property: Key Name
  type: PropertyValue
  value: D
additional property: Mode Name
  type: PropertyValue
  value: Minor

Mascarita
type: MusicRecording
duration: PT2M51S
duration ms: 171853
explicit: false
by artist: Pedro Laurenz
in album: Serie 78 RPM: Orquestas De Antaño - Pedro Laurenz
  type: MusicAlbum
  date published: 2004-07-15
genre: tango
isrc code: ARF034000034
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T20:34:32+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xd22472eb916a0ac2aaa32374ae77f6e848286821b284ab6228229b3df0b37c60
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 957120
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957120
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF034000034
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:22:41Z
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 0xd22472eb916a0ac2aaa32374ae77f6e848286821b284ab6228229b3df0b37c60. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF034000034 — a six-check JSON result.
  date published: 2026-07-08T03:22:41Z
audio: Mascarita
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 124.717
  additional property: Musical Key
    type: PropertyValue
    value: 11
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.597
  additional property: Energy
    type: PropertyValue
    value: 0.526
  additional property: Speechiness
    type: PropertyValue
    value: 0.043
  additional property: Acousticness
    type: PropertyValue
    value: 0.98
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.125
  additional property: Liveness
    type: PropertyValue
    value: 0.233
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.909
  additional property: Loudness (dB)
    type: PropertyValue
    value: -9.583
  additional property: Key Name
    type: PropertyValue
    value: B
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Amurado
type: MusicRecording
duration: PT2M28S
duration ms: 148546
explicit: false
by artist: Pedro Laurenz
in album: Serie 78 RPM: Orquestas De Antaño - Pedro Laurenz
  type: MusicAlbum
  date published: 2004-07-15
genre: tango
isrc code: ARF039901039
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-21T13:08:45+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x27b0849e60860710eed68ffb196e8684f48048457bd44e5d65a45162dc74e900
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/ARF039901039
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 0x27b0849e60860710eed68ffb196e8684f48048457bd44e5d65a45162dc74e900. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF039901039 — a six-check JSON result.
  date published: 2026-07-02T03:30:09Z
audio: Amurado
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 139.568
  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: 0.53
  additional property: Energy
    type: PropertyValue
    value: 0.683
  additional property: Speechiness
    type: PropertyValue
    value: 0.039
  additional property: Acousticness
    type: PropertyValue
    value: 0.972
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.22
  additional property: Liveness
    type: PropertyValue
    value: 0.351
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.882
  additional property: Loudness (dB)
    type: PropertyValue
    value: -8.916
  additional property: Key Name
    type: PropertyValue
    value: F
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Maria Remedios
type: MusicRecording
duration: PT2M42S
duration ms: 162693
explicit: false
by artist: Pedro Laurenz
in album: Serie 78 RPM: Orquestas De Antaño - Pedro Laurenz
  type: MusicAlbum
  date published: 2004-07-15
genre: tango
isrc code: ARF034200057
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-31T23:07:47+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xae28eb9fb076d3f9cb6a49d8293cf889ad3495d64a5f0ecd233295572a539882
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960478
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960478
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF034200057
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T23:30:38Z
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 0xae28eb9fb076d3f9cb6a49d8293cf889ad3495d64a5f0ecd233295572a539882. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF034200057 — a six-check JSON result.
  date published: 2026-07-31T23:30:38Z
audio: Maria Remedios
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 123.566
  additional property: Musical Key
    type: PropertyValue
    value: 2
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.533
  additional property: Energy
    type: PropertyValue
    value: 0.33
  additional property: Speechiness
    type: PropertyValue
    value: 0.047
  additional property: Acousticness
    type: PropertyValue
    value: 0.99
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.005
  additional property: Liveness
    type: PropertyValue
    value: 0.291
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.757
  additional property: Loudness (dB)
    type: PropertyValue
    value: -12.861
  additional property: Key Name
    type: PropertyValue
    value: D
  additional property: Mode Name
    type: PropertyValue
    value: Major

Que Nunca Me Falte
type: MusicAlbum
date published: 2005-01-01
track: Alma De Bohemia
  type: MusicRecording
  duration: PT2M42S
  duration ms: 162733
  explicit: false
  by artist: Pedro Laurenz
  in album: Que Nunca Me Falte
    type: MusicAlbum
    date published: 2005-01-01
  genre: tango
  isrc code: ART340903019
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-18T10:13:02+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xce674edec299133eb4b6ce316cbe9a4ade482e7aaa2ea3c1248fee40f006260c
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958538
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958538
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ART340903019
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-18T10:30:13Z
  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 0xce674edec299133eb4b6ce316cbe9a4ade482e7aaa2ea3c1248fee40f006260c. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ART340903019 — a six-check JSON result.
    date published: 2026-07-18T10:30:13Z
  audio: Alma De Bohemia
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 124.33
    additional property: Musical Key
      type: PropertyValue
      value: 10
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.517
    additional property: Energy
      type: PropertyValue
      value: 0.193
    additional property: Speechiness
      type: PropertyValue
      value: 0.035
    additional property: Acousticness
      type: PropertyValue
      value: 0.967
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.133
    additional property: Liveness
      type: PropertyValue
      value: 0.286
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.439
    additional property: Loudness (dB)
      type: PropertyValue
      value: -7.673
    additional property: Key Name
      type: PropertyValue
      value: Bb
    additional property: Mode Name
      type: PropertyValue
      value: Minor
track: Garúa
  type: MusicRecording
  duration: PT3M9S
  duration ms: 189120
  explicit: false
  by artist: Pedro Laurenz
  in album: Que Nunca Me Falte
    type: MusicAlbum
    date published: 2005-01-01
  genre: tango
  isrc code: ART340903000
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-14T19:39:53+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xe173d6d20084c08cff03f511a0978a5bd161ee053a6a1e6db3007affaa3b73f1
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958058
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958058
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ART340903000
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-14T20:20:34Z
  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 0xe173d6d20084c08cff03f511a0978a5bd161ee053a6a1e6db3007affaa3b73f1. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ART340903000 — a six-check JSON result.
    date published: 2026-07-14T20:20:34Z
  audio: Garúa
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 121.802
    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: 0.603
    additional property: Energy
      type: PropertyValue
      value: 0.281
    additional property: Speechiness
      type: PropertyValue
      value: 0.046
    additional property: Acousticness
      type: PropertyValue
      value: 0.979
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.287
    additional property: Liveness
      type: PropertyValue
      value: 0.144
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.751
    additional property: Loudness (dB)
      type: PropertyValue
      value: -8.038
    additional property: Key Name
      type: PropertyValue
      value: E
    additional property: Mode Name
      type: PropertyValue
      value: Minor
track: Recién
  type: MusicRecording
  duration: PT2M41S
  duration ms: 161000
  explicit: false
  by artist: Pedro Laurenz
  in album: Que Nunca Me Falte
    type: MusicAlbum
    date published: 2005-01-01
  genre: tango
  isrc code: ART340903021
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-13T18:50:34+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x326307265cf90e0ee3a7b4ba7a253c6f6daf72a65020201277606f7390ee6eec
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 957898
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/957898
  additional property: OTSVerificationAPI
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: Recién
track: Yo Quiero Cantar Un Tango
track: Mascarita
track: Nunca Tuvo Novio
track: La Vida Es Una Milonga
track: Al Verla Pasar
track: Llueve Otra Vez
track: Abandono

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ART340903021

OTSTimestamp
type: PropertyValue
value: 2026-07-13T19:28:48Z

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 0x326307265cf90e0ee3a7b4ba7a253c6f6daf72a65020201277606f7390ee6eec. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ART340903021 — a six-check JSON result.
date published: 2026-07-13T19:28:48Z

Recién
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 121.408
additional property: Musical Key
  type: PropertyValue
  value: 5
additional property: Mode (Major/Minor)
  type: PropertyValue
  value: 0
additional property: Time Signature
  type: PropertyValue
  value: 4
additional property: Danceability
  type: PropertyValue
  value: 0.559
additional property: Energy
  type: PropertyValue
  value: 0.281
additional property: Speechiness
  type: PropertyValue
  value: 0.038
additional property: Acousticness
  type: PropertyValue
  value: 0.979
additional property: Instrumentalness
  type: PropertyValue
  value: 0.83
additional property: Liveness
  type: PropertyValue
  value: 0.174
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.635
additional property: Loudness (dB)
  type: PropertyValue
  value: -7.932
additional property: Key Name
  type: PropertyValue
  value: F
additional property: Mode Name
  type: PropertyValue
  value: Minor

Yo Quiero Cantar Un Tango
type: MusicRecording
duration: PT3M4S
duration ms: 184546
explicit: false
by artist: Pedro Laurenz
in album: Que Nunca Me Falte
  type: MusicAlbum
  date published: 2005-01-01
genre: tango
isrc code: ART340903023
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-19T03:26:53+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x69a3460da29bbac7eff2d16e104de98202105df1df9ca8c459b800542263ffc5
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958650
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/958650
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ART340903023
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-19T03:36:41Z
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 0x69a3460da29bbac7eff2d16e104de98202105df1df9ca8c459b800542263ffc5. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ART340903023 — a six-check JSON result.
  date published: 2026-07-19T03:36:41Z
audio: Yo Quiero Cantar Un Tango
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 123.651
  additional property: Musical Key
    type: PropertyValue
    value: 11
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.62
  additional property: Energy
    type: PropertyValue
    value: 0.286
  additional property: Speechiness
    type: PropertyValue
    value: 0.044
  additional property: Acousticness
    type: PropertyValue
    value: 0.98
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.289
  additional property: Liveness
    type: PropertyValue
    value: 0.147
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.747
  additional property: Loudness (dB)
    type: PropertyValue
    value: -7.112
  additional property: Key Name
    type: PropertyValue
    value: B
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Mascarita
type: MusicRecording
duration: PT2M53S
duration ms: 173573
explicit: false
by artist: Pedro Laurenz
in album: Que Nunca Me Falte
  type: MusicAlbum
  date published: 2005-01-01
genre: tango
isrc code: ART340903024
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-20T07:27:30+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x9d5b396904acba717719f2d76a75f3b382ec743c0d77ef66c4882673bd3f8ac1
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958842
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/958842
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ART340903024
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-20T07:48:27Z
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 0x9d5b396904acba717719f2d76a75f3b382ec743c0d77ef66c4882673bd3f8ac1. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ART340903024 — a six-check JSON result.
  date published: 2026-07-20T07:48:27Z
audio: Mascarita
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 109.842
  additional property: Musical Key
    type: PropertyValue
    value: 11
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 3
  additional property: Danceability
    type: PropertyValue
    value: 0.585
  additional property: Energy
    type: PropertyValue
    value: 0.548
  additional property: Speechiness
    type: PropertyValue
    value: 0.042
  additional property: Acousticness
    type: PropertyValue
    value: 0.979
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.115
  additional property: Liveness
    type: PropertyValue
    value: 0.314
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.927
  additional property: Loudness (dB)
    type: PropertyValue
    value: -4.507
  additional property: Key Name
    type: PropertyValue
    value: B
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Nunca Tuvo Novio
type: MusicRecording
duration: PT3M13S
duration ms: 193626
explicit: false
by artist: Pedro Laurenz
in album: Que Nunca Me Falte
  type: MusicAlbum
  date published: 2005-01-01
genre: tango
isrc code: ART340903007
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-04T13:56:59+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x8dd1a28c371c200ee9bcfcfb2143d08114fe3cd0d5a996f25c3297d8c4e0b1c7
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/ART340903007
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 0x8dd1a28c371c200ee9bcfcfb2143d08114fe3cd0d5a996f25c3297d8c4e0b1c7. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ART340903007 — a six-check JSON result.
  date published: 2026-07-05T01:12:41Z
audio: Nunca Tuvo Novio
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 122.668
  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: 0.672
  additional property: Energy
    type: PropertyValue
    value: 0.328
  additional property: Speechiness
    type: PropertyValue
    value: 0.039
  additional property: Acousticness
    type: PropertyValue
    value: 0.992
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.002
  additional property: Liveness
    type: PropertyValue
    value: 0.225
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.716
  additional property: Loudness (dB)
    type: PropertyValue
    value: -8.114
  additional property: Key Name
    type: PropertyValue
    value: E
  additional property: Mode Name
    type: PropertyValue
    value: Major

La Vida Es Una Milonga
type: MusicRecording
duration: PT2M24S
duration ms: 144880
explicit: false
by artist: Pedro Laurenz
in album: Que Nunca Me Falte
  type: MusicAlbum
  date published: 2005-01-01
genre: tango
isrc code: ART340903008
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-13T18:39:12+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xe38c0f226aee85e6d6b0f964fbf911525d1c3be449c26262af4a563b935f706c
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 957898
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957898
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ART340903008
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-13T19:28:48Z
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 0xe38c0f226aee85e6d6b0f964fbf911525d1c3be449c26262af4a563b935f706c. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ART340903008 — a six-check JSON result.
  date published: 2026-07-13T19:28:48Z
audio: La Vida Es Una Milonga
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 109.196
  additional property: Musical Key
    type: PropertyValue
    value: 5
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.746
  additional property: Energy
    type: PropertyValue
    value: 0.47
  additional property: Speechiness
    type: PropertyValue
    value: 0.042
  additional property: Acousticness
    type: PropertyValue
    value: 0.962
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.017
  additional property: Liveness
    type: PropertyValue
    value: 0.403
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.905
  additional property: Loudness (dB)
    type: PropertyValue
    value: -4.538
  additional property: Key Name
    type: PropertyValue
    value: F
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Al Verla Pasar
type: MusicRecording
duration: PT3M24S
duration ms: 204293
explicit: false
by artist: Pedro Laurenz
in album: Que Nunca Me Falte
  type: MusicAlbum
  date published: 2005-01-01
genre: tango
isrc code: ART340903029
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-04T08:11:15+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xd85b27e1c7d48b59572adf3a98247c256b2bddeaf4c361f802e288805ab69996
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/ART340903029
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 0xd85b27e1c7d48b59572adf3a98247c256b2bddeaf4c361f802e288805ab69996. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ART340903029 — a six-check JSON result.
  date published: 2026-07-04T10:04:33Z
audio: Al Verla Pasar
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 121.532
  additional property: Musical Key
    type: PropertyValue
    value: 0
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.592
  additional property: Energy
    type: PropertyValue
    value: 0.328
  additional property: Speechiness
    type: PropertyValue
    value: 0.047
  additional property: Acousticness
    type: PropertyValue
    value: 0.984
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.02
  additional property: Liveness
    type: PropertyValue
    value: 0.094
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.378
  additional property: Loudness (dB)
    type: PropertyValue
    value: -8.896
  additional property: Key Name
    type: PropertyValue
    value: C
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Llueve Otra Vez
type: MusicRecording
duration: PT2M52S
duration ms: 172320
explicit: false
by artist: Pedro Laurenz
in album: Que Nunca Me Falte
  type: MusicAlbum
  date published: 2005-01-01
genre: tango
isrc code: ART340903009
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-17T00:28:28+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xa93e022d5045fe50dc38db3c9aac03ae788719f049bfc1df1942f8e2b1b0edc0
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958340
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/958340
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ART340903009
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-17T00:53:26Z
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 0xa93e022d5045fe50dc38db3c9aac03ae788719f049bfc1df1942f8e2b1b0edc0. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ART340903009 — a six-check JSON result.
  date published: 2026-07-17T00:53:26Z
audio: Llueve Otra Vez
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 119.103
  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: 0.601
  additional property: Energy
    type: PropertyValue
    value: 0.274
  additional property: Speechiness
    type: PropertyValue
    value: 0.039
  additional property: Acousticness
    type: PropertyValue
    value: 0.973
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.069
  additional property: Liveness
    type: PropertyValue
    value: 0.115
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.341
  additional property: Loudness (dB)
    type: PropertyValue
    value: -7.145
  additional property: Key Name
    type: PropertyValue
    value: D
  additional property: Mode Name
    type: PropertyValue
    value: Major

Abandono
type: MusicRecording
duration: PT2M33S
duration ms: 153160
explicit: false
by artist: Pedro Laurenz
in album: Que Nunca Me Falte
  type: MusicAlbum
  date published: 2005-01-01
genre: tango
isrc code: ART340903015
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-16T16:38:46+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x073cf9473ba3524559117d6bfc5452814dd87a9e80c22b8e3287d59d56fe2314
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958316
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/958316
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ART340903015
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-16T19:42:29Z
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 0x073cf9473ba3524559117d6bfc5452814dd87a9e80c22b8e3287d59d56fe2314. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ART340903015 — a six-check JSON result.
  date published: 2026-07-16T19:42:29Z
audio: Abandono
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 128.434
  additional property: Musical Key
    type: PropertyValue
    value: 6
  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: 0.416
  additional property: Speechiness
    type: PropertyValue
    value: 0.048
  additional property: Acousticness
    type: PropertyValue
    value: 0.958
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.058
  additional property: Liveness
    type: PropertyValue
    value: 0.31
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.815
  additional property: Loudness (dB)
    type: PropertyValue
    value: -3.088
  additional property: Key Name
    type: PropertyValue
    value: F#
  additional property: Mode Name
    type: PropertyValue
    value: Minor

The Roots Of Tango - Abandono
type: MusicAlbum
date published: 2011
track: No Me Extraña
  type: MusicRecording
  duration: PT2M43S
  duration ms: 163179
  explicit: false
  by artist: Pedro Laurenz
  in album: The Roots Of Tango - Abandono
    type: MusicAlbum
    date published: 2011
  genre: tango
  isrc code: DEBL61230397
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-15T11:05:46+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xefc3472f8dd6778b2b516daf6013bdcd7574c47e3482309d85f70ce6a9177ca3
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958152
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958152
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEBL61230397
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-15T12:00:27Z
  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 0xefc3472f8dd6778b2b516daf6013bdcd7574c47e3482309d85f70ce6a9177ca3. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEBL61230397 — a six-check JSON result.
    date published: 2026-07-15T12:00:27Z
  audio: No Me Extraña
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 134.651
    additional property: Musical Key
      type: PropertyValue
      value: 2
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.607
    additional property: Energy
      type: PropertyValue
      value: 0.298
    additional property: Speechiness
      type: PropertyValue
      value: 0.047
    additional property: Acousticness
      type: PropertyValue
      value: 0.962
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.705
    additional property: Liveness
      type: PropertyValue
      value: 0.318
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.902
    additional property: Loudness (dB)
      type: PropertyValue
      value: -12.762
    additional property: Key Name
      type: PropertyValue
      value: D
    additional property: Mode Name
      type: PropertyValue
      value: Minor

The Masters of Tango: Pedro Laurenz, Patria Mía
type: MusicAlbum
date published: 2013-03-18

Milonga de Mis Amores
type: MusicAlbum
date published: 2014-04-25

Tango: El Inolvidable
type: MusicAlbum
date published: 2014-05-12

Hits by Pedro Laurenz
type: MusicAlbum
date published: 2014-05-23

De Puro Guapo
type: MusicAlbum
date published: 2014-08-29

Mococita
type: MusicAlbum
date published: 2014-09-11

1937-1943
type: MusicAlbum
date published: 2014-10-09

Mala Junta
type: MusicAlbum
date published: 2014-11-02

Alma de Bohemio
type: MusicAlbum
date published: 2014-11-27

Arrabal
type: MusicAlbum
date published: 2014-12-09

Paisaje
type: MusicAlbum
date published: 2014-12-09

No Me Extrana
type: MusicAlbum
date published: 2014-12-09

Mascarita
type: MusicAlbum
date published: 2014-12-09

Arrabal
type: MusicAlbum
date published: 2015-02-23

Arrabal
type: MusicAlbum
date published: 2015-04-28

Todo
type: MusicAlbum
date published: 2015-04-28

Amurado (Historical Recordings)
type: MusicAlbum
date published: 2015-06-26

Desconsuelo (Historical Recordings)
type: MusicAlbum
date published: 2015-06-26
track: Quedate Tranquilo
  type: MusicRecording
  duration: PT2M41S
  duration ms: 161715
  explicit: false
  by artist: Pedro Laurenz
  in album: Desconsuelo (Historical Recordings)
    type: MusicAlbum
    date published: 2015-06-26
  genre: tango
  isrc code: DEN721507133
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-05T19:11:41+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xf0e92ba9620e259ba696949c09c7d8602a3f3623f2c76481e5a45b93d27473a4
  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/DEN721507133
  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 0xf0e92ba9620e259ba696949c09c7d8602a3f3623f2c76481e5a45b93d27473a4. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN721507133 — a six-check JSON result.
    date published: 2026-07-05T19:27:56Z
  audio: Quedate Tranquilo
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 127.527
    additional property: Musical Key
      type: PropertyValue
      value: 9
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.657
    additional property: Energy
      type: PropertyValue
      value: 0.161
    additional property: Speechiness
      type: PropertyValue
      value: 0.177
    additional property: Acousticness
      type: PropertyValue
      value: 0.991
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.845
    additional property: Liveness
      type: PropertyValue
      value: 0.286
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.666
    additional property: Loudness (dB)
      type: PropertyValue
      value: -16.497
    additional property: Key Name
      type: PropertyValue
      value: A
    additional property: Mode Name
      type: PropertyValue
      value: Minor

La Madrugada (Historical Recordings)
type: MusicAlbum
date published: 2015-06-26
track: Esta Noche al Pasar
  type: MusicRecording
  duration: PT2M51S
  duration ms: 171979
  explicit: false
  by artist: Pedro Laurenz
  in album: La Madrugada (Historical Recordings)
    type: MusicAlbum
    date published: 2015-06-26
  genre: tango
  isrc code: DEN721507318
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-16T04:09:24+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x47942e6bb0d09002e5076fc5044cf501c34038165be8b8be57b93ff918b54248
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958238
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958238
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN721507318
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-16T04:30:31Z
  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 0x47942e6bb0d09002e5076fc5044cf501c34038165be8b8be57b93ff918b54248. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN721507318 — a six-check JSON result.
    date published: 2026-07-16T04:30:31Z
  audio: Esta Noche al Pasar
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Desconsuelo (Historical Recordings)
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date published: 2015-07-03

Amurado (Historical Recordings)
type: MusicAlbum
date published: 2015-07-03

La Madrugada (Historical Recordings)
type: MusicAlbum
date published: 2015-07-03

Latin Salsa: Best Of Pedro Laurenz
type: MusicAlbum
date published: 2015-07-23

World's Novelty Champions: Pedro Laurenz
type: MusicAlbum
date published: 2015-08-05

Firuletear de Bandoneón
type: MusicAlbum
date published: 2015-08-24

Greatest Songs
type: MusicAlbum
date published: 2017

Ars Moderna
type: MusicAlbum
date published: 2017-05-05

Valses y Milongas
type: MusicAlbum
date published: 2019-01-17

No Me Extrana
type: MusicAlbum
date published: 2019-01-26

Paisaje
type: MusicAlbum
date published: 2019-01-26

Arrabal
type: MusicAlbum
date published: 2019-01-26

Mascarita
type: MusicAlbum
date published: 2019-03-09

Milonga de Mis Amores. Pedro Laurenz con Su Orquesta Típica 1937-1944
type: MusicAlbum
date published: 2020-02-20

Milonga de mis amores
type: MusicAlbum
date published: 2021-06-04

Bandoneón Master
type: MusicAlbum
date published: 2022-06-10

Mi Ultimo Tango
type: MusicAlbum
date published: 2023-12-01

De Puro Guapo
type: MusicAlbum
date published: 2024-08-02

Amurado
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by artist: Juan Carlos Casas
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
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Mal de amores
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duration ms: 185480
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by artist: Orquesta de Francisco Rotundo
by artist: Pedro Laurenz
in album: Las vueltas de la vida (1948-1957)
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popularity: 2
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-30T17:23:26Z
audio: Mal de amores
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Temblando
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duration ms: 185000
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by artist: Pedro Laurenz
by artist: Carlos Bermúdez
in album: 50 Tangazos
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popularity: 1
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T18:48:12Z
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
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  date published: 2026-07-31T18:48:12Z
audio: Temblando
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Mala junta
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duration ms: 204346
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by artist: Orquesta Osvaldo Pugliese
by artist: Pedro Laurenz
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-29T19:35:34Z
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