Apollo Trio
type: MusicGroup
genre: polka
popularity: 21
followers: 1991
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additional property: OTSVerifyInstructions
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  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
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe755f29e789366e733e44e645691c8614f0d15ac4d785bd361a31b9c7e07721b. 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/5cd8caff-2bce-48d3-93f6-96288685f950.json and https://artists.proofprofile.net/proofs/artist/5cd8caff-2bce-48d3-93f6-96288685f950.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T21:20:00Z
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album: Ik Kom Ut Fryslan
  type: MusicAlbum
  date published: 1977-10-10
album: Mama, is het ver naar de hemel
  type: MusicAlbum
  date published: 1990-03-01
album: Mij blijven slechts herinneringen
  type: MusicAlbum
  date published: 1991-03-01
album: Grootste successen van het Apollo trio
  type: MusicAlbum
  date published: 1992-03-01
  track: Met een beetje zonneschijn
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    in album: Grootste successen van het Apollo trio
      type: MusicAlbum
      date published: 1992-03-01
    genre: polka
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    additional property: OTSTimestamp
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    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
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      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3c61a95202e87b709bbf553d81c4d091343c3795ae7521789ef8d0be609a9a. 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/NLA521402939.
      date published: 2026-07-05T19:27:56Z
    audio: Met een beetje zonneschijn
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      additional property: Tempo (BPM)
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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: Instrumentalness
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      additional property: Valence (Positivity)
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        value: -9.258
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  track: Samen in een bootje
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      type: MusicAlbum
      date published: 1992-03-01
    genre: polka
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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: 2026-07-03T01:01:38Z
    audio: Samen in een bootje
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      additional property: Danceability
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      additional property: Energy
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  track: We dansten tot diep in de nacht
album: Fictional Realities
album: Fictional Realities (Live)
album: The Apollo Trio Complete Dvorak Piano Trios

Instrumentalness
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value: 0.003

Liveness
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Valence (Positivity)
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value: 0.451

Loudness (dB)
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value: -9.776

Key Name
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value: Bb

Mode Name
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value: Major

We dansten tot diep in de nacht
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duration: PT3M24S
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  type: MusicAlbum
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genre: polka
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additional property: OTSTimestamp
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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
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x180db63c85af3b76a4448981b1635fd686398f201755e2be9207956f0484eaae. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA521402943.
  date published: 2026-07-04T10:04:33Z
audio: We dansten tot diep in de nacht
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  additional property: Danceability
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Fictional Realities
type: MusicAlbum
date published: 2015-01-01

Fictional Realities (Live)
type: MusicAlbum
date published: 2015-01-01

The Apollo Trio Complete Dvorak Piano Trios
type: MusicAlbum
date published: 2017-02-01