Tuna Universitaria De Madrid
type: MusicGroup
popularity: 23
followers: 2604
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xe13918f3e2b286e1e2597c44ea6b42ec5742888f91a8af014bfadd8f564af905
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953407
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953407
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/87347573-82ac-4c55-8867-f8bd9ed863e0.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/87347573-82ac-4c55-8867-f8bd9ed863e0.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/87347573-82ac-4c55-8867-f8bd9ed863e0
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xe13918f3e2b286e1e2597c44ea6b42ec5742888f91a8af014bfadd8f564af905","name":"Tuna Universitaria De Madrid","registered_at":"2026-06-12T03:38:48Z","symbol":"NIM0175470","token_address":"0xce91ca53b89aeaaa16bc0ef0c8cd9e9738109bf6","type":"artist","uuid":"87347573-82ac-4c55-8867-f8bd9ed863e0"}
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13918f3e2b286e1e2597c44ea6b42ec5742888f91a8af014bfadd8f564af905. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/87347573-82ac-4c55-8867-f8bd9ed863e0.json and https://artists.proofprofile.net/proofs/artist/87347573-82ac-4c55-8867-f8bd9ed863e0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T21:20:00Z
  text: {"copyright_id":"0xe13918f3e2b286e1e2597c44ea6b42ec5742888f91a8af014bfadd8f564af905","name":"Tuna Universitaria De Madrid","registered_at":"2026-06-12T03:38:48Z","symbol":"NIM0175470","token_address":"0xce91ca53b89aeaaa16bc0ef0c8cd9e9738109bf6","type":"artist","uuid":"87347573-82ac-4c55-8867-f8bd9ed863e0"}
album: Ronda la tuna (2016 Remasterizado)
  type: MusicAlbum
  date published: 1977
album: Tuna Universitaria de Madrid
  type: MusicAlbum
  date published: 1977-01-01
album: Tunas
  type: MusicAlbum
  date published: 2004-08-10
album: Clavelitos
  type: MusicAlbum
  date published: 2010-01-03
album: La Estudiantina Ronda
  type: MusicAlbum
  date published: 2010-04-06
album: Pasa La Tuna
  type: MusicAlbum
  date published: 2011-05-12
  track: En Esta Noche Clara
    type: MusicRecording
    duration: PT2M59S
    duration ms: 179253
    explicit: false
    by artist: Tuna Universitaria De Madrid
    in album: Pasa La Tuna
      type: MusicAlbum
      date published: 2011-05-12
    isrc code: ES5531102336
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-15T12:00:48+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xb88ee453165828181738e7fcf7cce085362aac8545904423017c818dd63e4065
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958157
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958157
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5531102336
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-15T15:03:41Z
    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
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb88ee453165828181738e7fcf7cce085362aac8545904423017c818dd63e4065. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:03:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5531102336.
      date published: 2026-07-15T15:03:41Z
    audio: En Esta Noche Clara
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 180.983
      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: 0.333
      additional property: Energy
        type: PropertyValue
        value: 0.514
      additional property: Speechiness
        type: PropertyValue
        value: 0.059
      additional property: Acousticness
        type: PropertyValue
        value: 0.919
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.307
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.646
      additional property: Loudness (dB)
        type: PropertyValue
        value: -7.157
      additional property: Key Name
        type: PropertyValue
        value: E
      additional property: Mode Name
        type: PropertyValue
        value: Minor
  track: Clavelitos
    type: MusicRecording
    duration: PT2M40S
    duration ms: 160826
    explicit: false
    by artist: Tuna Universitaria De Madrid
    in album: Pasa La Tuna
      type: MusicAlbum
      date published: 2011-05-12
    isrc code: ES5531102337
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-12T17:54:21+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x1505fa54e191472263e2c3ec07d888bc3c9e9913329e3f4d08319e67cdb1aa30
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 957741
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/957741
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5531102337
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-12T18:30:59Z
    additional property: OTSVerifyInstructions
      type: PropertyValue
      value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1505fa54e191472263e2c3ec07d888bc3c9e9913329e3f4d08319e67cdb1aa30. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5531102337.
      date published: 2026-07-12T18:30:59Z
    audio: Clavelitos
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 96.325
      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: 0.412
      additional property: Energy
        type: PropertyValue
        value: 0.548
      additional property: Speechiness
        type: PropertyValue
        value: 0.051
      additional property: Acousticness
      additional property: Instrumentalness
      additional property: Liveness
      additional property: Valence (Positivity)
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name
  track: Carolina
  track: Esta Noche No Alumbra
  track: Estudiantina Madrileña
  track: Fonseca
  track: Horas De Ronda
  track: Malagueña
  track: Y Viva España
album: Ronda de la Tuna Universitaria. 25 Canciones y Pasodobles Estudiantiles
album: Pasa la Tuna
album: Tunas para una Ronda
album: Las Mejores Tunas
album: Noches de Ronda la Tuna
album: La Tuna Pasa
album: Tunas Latinos de Oro
album: Noches de Ronda Vol. 2
album: Viva la Tuna
album: Lo Mejor de la Tuna, Vol. 1
album: Lo Mejor de la Tuna, Vol. 2
album: La Tuna 14 Grandes Canciones

Acousticness
type: PropertyValue
value: 0.959

Instrumentalness
type: PropertyValue
value: 0

Liveness
type: PropertyValue
value: 0.345

Valence (Positivity)
type: PropertyValue
value: 0.789

Loudness (dB)
type: PropertyValue
value: -7.653

Key Name
type: PropertyValue
value: A

Mode Name
type: PropertyValue
value: Minor

Carolina
type: MusicRecording
duration: PT2M27S
duration ms: 147573
explicit: false
by artist: Tuna Universitaria De Madrid
in album: Pasa La Tuna
  type: MusicAlbum
  date published: 2011-05-12
isrc code: ES5531102341
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-19T09:41:09+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x0e906e0f5c6a9b0ca9974179055f49a6be3396b5c363ad4d2d5120d25f3fdd4b
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958716
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/958716
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5531102341
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-19T10:15:55Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e906e0f5c6a9b0ca9974179055f49a6be3396b5c363ad4d2d5120d25f3fdd4b. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5531102341.
  date published: 2026-07-19T10:15:55Z
audio: Carolina
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 101.352
  additional property: Musical Key
    type: PropertyValue
    value: 8
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.596
  additional property: Energy
    type: PropertyValue
    value: 0.587
  additional property: Speechiness
    type: PropertyValue
    value: 0.026
  additional property: Acousticness
    type: PropertyValue
    value: 0.282
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.167
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.926
  additional property: Loudness (dB)
    type: PropertyValue
    value: -7.053
  additional property: Key Name
    type: PropertyValue
    value: Ab
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Esta Noche No Alumbra
type: MusicRecording
duration: PT2M9S
duration ms: 129573
explicit: false
by artist: Tuna Universitaria De Madrid
in album: Pasa La Tuna
  type: MusicAlbum
  date published: 2011-05-12
isrc code: ES5531102344
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-17T00:28:51+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x66f0695294581d2bbeec8ff73f1176ea198b13e6a8bf3b393e36e4445470d764
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958342
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/958342
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5531102344
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-17T03:30:43Z
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f0695294581d2bbeec8ff73f1176ea198b13e6a8bf3b393e36e4445470d764. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:30:43Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5531102344.
  date published: 2026-07-17T03:30:43Z
audio: Esta Noche No Alumbra
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 98.307
  additional property: Musical Key
    type: PropertyValue
    value: 2
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 1
  additional property: Danceability
    type: PropertyValue
    value: 0.528
  additional property: Energy
    type: PropertyValue
    value: 0.576
  additional property: Speechiness
    type: PropertyValue
    value: 0.032
  additional property: Acousticness
    type: PropertyValue
    value: 0.929
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.21
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.758
  additional property: Loudness (dB)
    type: PropertyValue
    value: -9.814
  additional property: Key Name
    type: PropertyValue
    value: D
  additional property: Mode Name
    type: PropertyValue
    value: Major

Estudiantina Madrileña
type: MusicRecording
duration: PT2M8S
duration ms: 128466
explicit: false
by artist: Tuna Universitaria De Madrid
in album: Pasa La Tuna
  type: MusicAlbum
  date published: 2011-05-12
isrc code: ES5531102346
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-03T14:51:30+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xb4866d011d9a8d94e6e0e3a01e103163167b9081ee7e09f4a7e2eecab7ab4b35
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956576
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956576
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5531102346
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-04T02:06:47Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4866d011d9a8d94e6e0e3a01e103163167b9081ee7e09f4a7e2eecab7ab4b35. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5531102346.
  date published: 2026-07-04T02:06:47Z
audio: Estudiantina Madrileña
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 69.576
  additional property: Musical Key
    type: PropertyValue
    value: 7
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.51
  additional property: Energy
    type: PropertyValue
    value: 0.476
  additional property: Speechiness
    type: PropertyValue
    value: 0.085
  additional property: Acousticness
    type: PropertyValue
    value: 0.894
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.099
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.629
  additional property: Loudness (dB)
    type: PropertyValue
    value: -8.767
  additional property: Key Name
    type: PropertyValue
    value: G
  additional property: Mode Name
    type: PropertyValue
    value: Major

Fonseca
type: MusicRecording
duration: PT2M46S
duration ms: 166426
explicit: false
by artist: Tuna Universitaria De Madrid
in album: Pasa La Tuna
  type: MusicAlbum
  date published: 2011-05-12
isrc code: ES5531102347
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-14T21:35:04+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x868ad3f2365a4ac06ac7672f03bdcffeeedc866366067364d68b02e1d463295a
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958074
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/958074
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5531102347
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-14T22:45:25Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x868ad3f2365a4ac06ac7672f03bdcffeeedc866366067364d68b02e1d463295a. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5531102347.
  date published: 2026-07-14T22:45:25Z
audio: Fonseca
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 203.362
  additional property: Musical Key
    type: PropertyValue
    value: 4
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 3
  additional property: Danceability
    type: PropertyValue
    value: 0.288
  additional property: Energy
    type: PropertyValue
    value: 0.531
  additional property: Speechiness
    type: PropertyValue
    value: 0.042
  additional property: Acousticness
    type: PropertyValue
    value: 0.932
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.323
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.681
  additional property: Loudness (dB)
    type: PropertyValue
    value: -6.762
  additional property: Key Name
    type: PropertyValue
    value: E
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Horas De Ronda
type: MusicRecording
duration: PT2M41S
duration ms: 161173
explicit: false
by artist: Tuna Universitaria De Madrid
in album: Pasa La Tuna
  type: MusicAlbum
  date published: 2011-05-12
isrc code: ES5531102348
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-18T02:15:19+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x10ee8c73f02ba2408d4b8de5cceaa59241297bbdaddb575cfbb7a7966787db7e
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958480
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/958480
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5531102348
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-18T02:58:58Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ee8c73f02ba2408d4b8de5cceaa59241297bbdaddb575cfbb7a7966787db7e. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5531102348.
  date published: 2026-07-18T02:58:58Z
audio: Horas De Ronda
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 127.451
  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: 0.738
  additional property: Energy
    type: PropertyValue
    value: 0.567
  additional property: Speechiness
    type: PropertyValue
    value: 0.042
  additional property: Acousticness
    type: PropertyValue
    value: 0.712
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.211
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.919
  additional property: Loudness (dB)
    type: PropertyValue
    value: -9.331
  additional property: Key Name
    type: PropertyValue
    value: D
  additional property: Mode Name
    type: PropertyValue
    value: Major

Malagueña
type: MusicRecording
duration: PT3M6S
duration ms: 186013
explicit: false
by artist: Tuna Universitaria De Madrid
in album: Pasa La Tuna
  type: MusicAlbum
  date published: 2011-05-12
isrc code: ES5531102353
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-19T19:46:14+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x999b12b1736482a5e1033392e669a1f2603a59e5b5e2fea9e5de4e890808d3c8
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958775
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/958775
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5531102353
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-19T22:47:34Z
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999b12b1736482a5e1033392e669a1f2603a59e5b5e2fea9e5de4e890808d3c8. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:47:34Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5531102353.
  date published: 2026-07-19T22:47:34Z
audio: Malagueña
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 110.01
  additional property: Musical Key
    type: PropertyValue
    value: 1
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 3
  additional property: Danceability
    type: PropertyValue
    value: 0.335
  additional property: Energy
    type: PropertyValue
    value: 0.573
  additional property: Speechiness
    type: PropertyValue
    value: 0.031
  additional property: Acousticness
    type: PropertyValue
    value: 0.885
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.227
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.405
  additional property: Loudness (dB)
    type: PropertyValue
    value: -6.482
  additional property: Key Name
    type: PropertyValue
    value: C#
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Y Viva España
type: MusicRecording
duration: PT2M53S
duration ms: 173973
explicit: false
by artist: Tuna Universitaria De Madrid
in album: Pasa La Tuna
  type: MusicAlbum
  date published: 2011-05-12
isrc code: ES5531102360
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-03T08:16:03+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x698b738a79616efe909de0ec7e09595b7d883470536e54b207e7d1ac05aea506
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956484
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956484
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5531102360
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-03T10:47:44Z
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698b738a79616efe909de0ec7e09595b7d883470536e54b207e7d1ac05aea506. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5531102360.
  date published: 2026-07-03T10:47:44Z
audio: Y Viva España
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 131.044
  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: 0.535
  additional property: Energy
    type: PropertyValue
    value: 0.528
  additional property: Speechiness
    type: PropertyValue
    value: 0.032
  additional property: Acousticness
    type: PropertyValue
    value: 0.62
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.207
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.495
  additional property: Loudness (dB)
    type: PropertyValue
    value: -8.021
  additional property: Key Name
    type: PropertyValue
    value: D
  additional property: Mode Name
    type: PropertyValue
    value: Major

Ronda de la Tuna Universitaria. 25 Canciones y Pasodobles Estudiantiles
type: MusicAlbum
date published: 2011-10-18

Pasa la Tuna
type: MusicAlbum
date published: 2013-01-11

Tunas para una Ronda
type: MusicAlbum
date published: 2013-05-12

Las Mejores Tunas
type: MusicAlbum
date published: 2013-05-12
track: Ronda del Silbidito
  type: MusicRecording
  duration: PT2M20S
  duration ms: 140773
  explicit: false
  by artist: Tuna Universitaria De Madrid
  in album: Las Mejores Tunas
    type: MusicAlbum
    date published: 2013-05-12
  isrc code: USV351331565
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-19T08:25:13+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x3395565617f163480106cbb962696ef18fc2bcecd606c36586770d3bb41b9c5b
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958705
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958705
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USV351331565
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-19T08:43:25Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3395565617f163480106cbb962696ef18fc2bcecd606c36586770d3bb41b9c5b. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USV351331565.
    date published: 2026-07-19T08:43:25Z
  audio: Ronda del Silbidito
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 168.576
    additional property: Musical Key
      type: PropertyValue
      value: 2
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 3
    additional property: Danceability
      type: PropertyValue
      value: 0.376
    additional property: Energy
      type: PropertyValue
      value: 0.598
    additional property: Speechiness
      type: PropertyValue
      value: 0.028
    additional property: Acousticness
      type: PropertyValue
      value: 0.787
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.492
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.923
    additional property: Loudness (dB)
      type: PropertyValue
      value: -5.458
    additional property: Key Name
      type: PropertyValue
      value: D
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: Clavelitos
  type: MusicRecording
  duration: PT2M26S
  duration ms: 146053
  explicit: false
  by artist: Tuna Universitaria De Madrid
  in album: Las Mejores Tunas
    type: MusicAlbum
    date published: 2013-05-12
  isrc code: USV351331567
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-05T12:36:01+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x73a0c2dd3d5c1adc8ea4bf5dc09d40dabbaf1464d5de727a1ddf4f8fad8b9946
  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/USV351331567
  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
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a0c2dd3d5c1adc8ea4bf5dc09d40dabbaf1464d5de727a1ddf4f8fad8b9946. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USV351331567.
    date published: 2026-07-05T19:27:56Z
  audio: Clavelitos
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 103.988
    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: 0.463
    additional property: Energy
      type: PropertyValue
      value: 0.693
    additional property: Speechiness
      type: PropertyValue
      value: 0.028
    additional property: Acousticness
      type: PropertyValue
      value: 0.689
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.178
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.752
    additional property: Loudness (dB)
      type: PropertyValue
      value: -5.879
    additional property: Key Name
      type: PropertyValue
      value: A
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: Tuna Compostelana
  type: MusicRecording
  duration: PT4M34S
  duration ms: 274706
  explicit: false
  by artist: Tuna Universitaria De Madrid
  in album: Las Mejores Tunas
    type: MusicAlbum
    date published: 2013-05-12
  isrc code: USV351331570
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-18T17:30:12+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xfd63287c2aea7d9e8aeb3c1c4def26d31c715f3d5b466b2a07c20daebf6b77ec
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958594
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958594
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USV351331570
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: Tuna Compostelana
track: Esta Noche No Alumbra
track: Las Cintas de Mi Capa

OTSTimestamp
type: PropertyValue
value: 2026-07-18T18:05:01Z

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

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd63287c2aea7d9e8aeb3c1c4def26d31c715f3d5b466b2a07c20daebf6b77ec. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USV351331570.
date published: 2026-07-18T18:05:01Z

Tuna Compostelana
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 134.289
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: 0.435
additional property: Energy
  type: PropertyValue
  value: 0.664
additional property: Speechiness
  type: PropertyValue
  value: 0.031
additional property: Acousticness
  type: PropertyValue
  value: 0.811
additional property: Instrumentalness
  type: PropertyValue
  value: 0.003
additional property: Liveness
  type: PropertyValue
  value: 0.565
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.62
additional property: Loudness (dB)
  type: PropertyValue
  value: -5.792
additional property: Key Name
  type: PropertyValue
  value: D
additional property: Mode Name
  type: PropertyValue
  value: Major

Esta Noche No Alumbra
type: MusicRecording
duration: PT4M3S
duration ms: 243506
explicit: false
by artist: Tuna Universitaria De Madrid
in album: Las Mejores Tunas
  type: MusicAlbum
  date published: 2013-05-12
isrc code: USV351331573
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-05T04:01:54+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xa5fe91715b5a32707c4b63b43eb598b305e2eaa14c53b9d59a15320b287e6b3f
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956776
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956776
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USV351331573
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-05T10:59:37Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5fe91715b5a32707c4b63b43eb598b305e2eaa14c53b9d59a15320b287e6b3f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USV351331573.
  date published: 2026-07-05T10:59:37Z
audio: Esta Noche No Alumbra
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 93.444
  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: 0.473
  additional property: Energy
    type: PropertyValue
    value: 0.744
  additional property: Speechiness
    type: PropertyValue
    value: 0.032
  additional property: Acousticness
    type: PropertyValue
    value: 0.797
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.234
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.718
  additional property: Loudness (dB)
    type: PropertyValue
    value: -6.88
  additional property: Key Name
    type: PropertyValue
    value: D
  additional property: Mode Name
    type: PropertyValue
    value: Major

Las Cintas de Mi Capa
type: MusicRecording
duration: PT2M32S
duration ms: 152453
explicit: false
by artist: Tuna Universitaria De Madrid
in album: Las Mejores Tunas
  type: MusicAlbum
  date published: 2013-05-12
isrc code: USV351331576
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-05T04:47:21Z
audio: Las Cintas de Mi Capa
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Noches de Ronda la Tuna
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date published: 2014-06-09

La Tuna Pasa
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date published: 2014-06-29

Tunas Latinos de Oro
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date published: 2014-08-29

Noches de Ronda Vol. 2
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date published: 2014-10-20

Viva la Tuna
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date published: 2014-10-20

Lo Mejor de la Tuna, Vol. 1
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date published: 2014-12-19
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-05T18:48:28Z
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track: Triste y Sola
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  additional property: OTSVerifyInstructions
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    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-06T07:16:32Z
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Lo Mejor de la Tuna, Vol. 2
type: MusicAlbum
date published: 2014-12-19

La Tuna 14 Grandes Canciones
type: MusicAlbum
date published: 2015-04-19

Tunas
type: MusicAlbum
date published: 2015-10-02

La Tuna Pasa
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date published: 2015-11-27
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    date published: 2015-11-27
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  additional property: OTSVerifyInstructions
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    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
  subject of: OpenTimestamps Proof of Existence
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    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ebe86a231127b5922d089c6f85f4d8b2649be5999a5e71fdbc7c21f92b4ede. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:45:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMBZ91522197.
    date published: 2026-07-19T22:45:56Z
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