SpiriTango Quartet
type: MusicGroup
genre: tango
popularity: 7
followers: 325
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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  value: https://explorer.copyrightchains.com/tx/0x9399ad6b3be55d9cfd01b76e2846e5fac3e01f94a87621cedfc1b907ec282e5e
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954342
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954342
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/886a29d7-ec15-4eb2-91e8-7a18386cb6be.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/886a29d7-ec15-4eb2-91e8-7a18386cb6be.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/886a29d7-ec15-4eb2-91e8-7a18386cb6be
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-19T03:22:39Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x9399ad6b3be55d9cfd01b76e2846e5fac3e01f94a87621cedfc1b907ec282e5e","name":"SpiriTango Quartet","registered_at":"2026-06-17T13:14:18Z","symbol":"NIM1406433","token_address":"0xa6f278a110437f4bdf7d8feff26ccfcbb99c35b2","type":"artist","uuid":"886a29d7-ec15-4eb2-91e8-7a18386cb6be"}
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 0x9399ad6b3be55d9cfd01b76e2846e5fac3e01f94a87621cedfc1b907ec282e5e. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/886a29d7-ec15-4eb2-91e8-7a18386cb6be.json and https://artists.proofprofile.net/proofs/artist/886a29d7-ec15-4eb2-91e8-7a18386cb6be.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:22:39Z
  text: {"copyright_id":"0x9399ad6b3be55d9cfd01b76e2846e5fac3e01f94a87621cedfc1b907ec282e5e","name":"SpiriTango Quartet","registered_at":"2026-06-17T13:14:18Z","symbol":"NIM1406433","token_address":"0xa6f278a110437f4bdf7d8feff26ccfcbb99c35b2","type":"artist","uuid":"886a29d7-ec15-4eb2-91e8-7a18386cb6be"}
album: Piazzolla: Rage
  type: MusicAlbum
  date published: 2013-05-05
album: Chin Chin
  type: MusicAlbum
  date published: 2015-03-23
album: Transgressions: SpiriTango Quartet (Live)
  type: MusicAlbum
  date published: 2018-10-19
  track: Vuotonga - Live

Vuotonga - Live
type: MusicRecording
duration: PT3M27S
duration ms: 207626
explicit: false
by artist: SpiriTango Quartet
in album: Transgressions: SpiriTango Quartet (Live)
  type: MusicAlbum
  date published: 2018-10-19
genre: tango
isrc code: FRV731801425
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
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additional property: CopyrightChainExplorerURL
  type: PropertyValue
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additional property: OTSHash
additional property: OTSBitcoinBlock
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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/FRV731801425
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
additional property: ProofProfileEvidenceStatus
  type: PropertyValue
  value: verified-cc-db-prod
additional property: TokenDeploymentConfirmed
  type: PropertyValue
  value: true
additional property: ContentHash
additional property: BitcoinBlock
  type: PropertyValue
  value: 957120
additional property: BitcoinTime
  type: PropertyValue
  value: 2026-07-08T03:22:41+00:00
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a3fd636493824c6a283bae6d1d7ae74a830d996116a1463f9940576db7073e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRV731801425.
  date published: 2026-07-08T03:22:41Z
audio: Vuotonga - Live
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 119.168
  additional property: Musical Key
    type: PropertyValue
    value: 0
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.329
  additional property: Energy
    type: PropertyValue
    value: 0.339
  additional property: Speechiness
    type: PropertyValue
    value: 0.045
  additional property: Acousticness
    type: PropertyValue
    value: 0.366
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.841
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.457
  additional property: Loudness (dB)
    type: PropertyValue
    value: -20.789
  additional property: Key Name
    type: PropertyValue
    value: C
  additional property: Mode Name
    type: PropertyValue
    value: Major