Quinteto Francisco Canaro
type: MusicGroup
genre: tango
popularity: 2
followers: 157
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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  value: https://explorer.copyrightchains.com/tx/0xc373fc6b0d5902d2a29a110bc700e07eefd04d20ed038921e625aa624ca32500
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954066
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954066
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/5a3b31aa-6f5d-4f1e-bbfb-4539139293e2.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/5a3b31aa-6f5d-4f1e-bbfb-4539139293e2.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/5a3b31aa-6f5d-4f1e-bbfb-4539139293e2
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xc373fc6b0d5902d2a29a110bc700e07eefd04d20ed038921e625aa624ca32500","name":"Quinteto Francisco Canaro","registered_at":"2026-06-16T21:21:53Z","symbol":"NIM1179353","token_address":"0x7a063ec4864aa113ce05f2cbfda04e8a2bbe6462","type":"artist","uuid":"5a3b31aa-6f5d-4f1e-bbfb-4539139293e2"}
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 0xc373fc6b0d5902d2a29a110bc700e07eefd04d20ed038921e625aa624ca32500. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5a3b31aa-6f5d-4f1e-bbfb-4539139293e2.json and https://artists.proofprofile.net/proofs/artist/5a3b31aa-6f5d-4f1e-bbfb-4539139293e2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0xc373fc6b0d5902d2a29a110bc700e07eefd04d20ed038921e625aa624ca32500","name":"Quinteto Francisco Canaro","registered_at":"2026-06-16T21:21:53Z","symbol":"NIM1179353","token_address":"0x7a063ec4864aa113ce05f2cbfda04e8a2bbe6462","type":"artist","uuid":"5a3b31aa-6f5d-4f1e-bbfb-4539139293e2"}
album: Quinteto Francisco Canaro
  type: MusicAlbum
  date published: 1996-08-08
album: Quinteto Francisco Canaro Vol. 2
  type: MusicAlbum
  date published: 1997-06-06
album: Quinteto Francisco Canaro Vol. 2
  type: MusicAlbum
  date published: 1997-06-06
album: Quinteto Francisco Canaro Vol. 3
  type: MusicAlbum
  date published: 2000-10-10
track: La milonga optimista

La milonga optimista
type: MusicRecording
duration: PT2M28S
duration ms: 148906
explicit: false
by artist: Quinteto Francisco Canaro
in album: Milonga (Vol. 3: Milonga que peina canas)
  type: MusicAlbum
  date published: 2002-09-01
isrc code: DEN720100320
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
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additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN720100320
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:20:19Z
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: 957118
additional property: BitcoinTime
  type: PropertyValue
  value: 2026-07-08T03:20:19+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 0x2eb4408da0f41b1e8e49a760362c0e09dc628a0037d06dddbd16c6388c572eee. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEN720100320.
  date published: 2026-07-08T03:20:19Z
audio: La milonga optimista
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 123.255
  additional property: Musical Key
    type: PropertyValue
    value: 8
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.66
  additional property: Energy
    type: PropertyValue
    value: 0.368
  additional property: Speechiness
    type: PropertyValue
    value: 0.041
  additional property: Acousticness
    type: PropertyValue
    value: 0.958
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.857
  additional property: Liveness
    type: PropertyValue
    value: 0.146
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.901
  additional property: Loudness (dB)
    type: PropertyValue
    value: -14.877
  additional property: Key Name
    type: PropertyValue
    value: Ab
  additional property: Mode Name
    type: PropertyValue
    value: Major