VC2 Cello Duo
type: MusicGroup
popularity: 8
followers: 153
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x47c9e63fff87e77eacd20bff99f7f1524caed469718066e151d5d5588f818ec7
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954705
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954705
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f21256b8-a38a-4978-80d2-8c39d7d2f2e2.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f21256b8-a38a-4978-80d2-8c39d7d2f2e2.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/f21256b8-a38a-4978-80d2-8c39d7d2f2e2
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T13:42:37Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x47c9e63fff87e77eacd20bff99f7f1524caed469718066e151d5d5588f818ec7","name":"VC2 Cello Duo","registered_at":"2026-06-21T13:26:10Z","symbol":"NIM1935078","token_address":"0x6c3236b5c63336a714d896822fc6538fb5479973","type":"artist","uuid":"f21256b8-a38a-4978-80d2-8c39d7d2f2e2"}
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 0x47c9e63fff87e77eacd20bff99f7f1524caed469718066e151d5d5588f818ec7. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f21256b8-a38a-4978-80d2-8c39d7d2f2e2.json and https://artists.proofprofile.net/proofs/artist/f21256b8-a38a-4978-80d2-8c39d7d2f2e2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T13:42:37Z
  text: {"copyright_id":"0x47c9e63fff87e77eacd20bff99f7f1524caed469718066e151d5d5588f818ec7","name":"VC2 Cello Duo","registered_at":"2026-06-21T13:26:10Z","symbol":"NIM1935078","token_address":"0x6c3236b5c63336a714d896822fc6538fb5479973","type":"artist","uuid":"f21256b8-a38a-4978-80d2-8c39d7d2f2e2"}
album: Beethoven's Cellists
  type: MusicAlbum
  date published: 2018
  track: Cello Sonata No. 1 in E Minor, Op. 38 No. 1 (Arr. for 2 Cellos): I. Allegro non troppo
    type: MusicRecording
    duration: PT3M23S
    duration ms: 203666
    explicit: false
    by artist: VC2 Cello Duo
    in album: Beethoven's Cellists
      type: MusicAlbum
      date published: 2018
    isrc code: CAHKR1800001
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-11T15:37:12+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x80d11a9812e22eaacb53716fba435b9bdcbc92c5dd75d20ecb9ea8dc042fb95c
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 957583
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/957583
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAHKR1800001
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-11T15:53:17Z
    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 0x80d11a9812e22eaacb53716fba435b9bdcbc92c5dd75d20ecb9ea8dc042fb95c. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/CAHKR1800001.
      date published: 2026-07-11T15:53:17Z
    audio: Cello Sonata No. 1 in E Minor, Op. 38 No. 1 (Arr. for 2 Cellos): I. Allegro non troppo
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 132.95
      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: 0.382
      additional property: Energy
        type: PropertyValue
        value: 0.279
      additional property: Speechiness
        type: PropertyValue
        value: 0.046
      additional property: Acousticness
        type: PropertyValue
        value: 0.956
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.894
      additional property: Liveness
        type: PropertyValue
        value: 0.107
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.354
      additional property: Loudness (dB)
        type: PropertyValue
        value: -15.387
      additional property: Key Name
        type: PropertyValue
        value: E
      additional property: Mode Name
        type: PropertyValue
        value: Minor
  track: Cello Sonata No. 1 in E Minor, Op. 38 No. 1 (Arr. for 2 Cellos): III. Rondo. Allegretto
    type: MusicRecording
    duration: PT5M5S
    duration ms: 305466
    explicit: false
    by artist: VC2 Cello Duo
    in album: Beethoven's Cellists
      type: MusicAlbum
      date published: 2018
    isrc code: CAHKR1800003
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-22T03:45:54+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x65ca29b319fa95dd07817e5cbbaafd70d755d4d8eed37f4820a940453e5f02e0
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 959096
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/959096
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAHKR1800003
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-22T06:47:55Z
    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 0x65ca29b319fa95dd07817e5cbbaafd70d755d4d8eed37f4820a940453e5f02e0. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:47:55Z), 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/CAHKR1800003.
      date published: 2026-07-22T06:47:55Z
    audio: Cello Sonata No. 1 in E Minor, Op. 38 No. 1 (Arr. for 2 Cellos): III. Rondo. Allegretto
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 119.484
      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: 0.383
      additional property: Energy
        type: PropertyValue
        value: 0.181
      additional property: Speechiness
        type: PropertyValue
        value: 0.043
      additional property: Acousticness
        type: PropertyValue
        value: 0.982
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.891
      additional property: Liveness
        type: PropertyValue
        value: 0.193
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.537
      additional property: Loudness (dB)
        type: PropertyValue
        value: -16.814
      additional property: Key Name
      additional property: Mode Name
album: Verspielt
album: I and Thou

Key Name
type: PropertyValue
value: G

Mode Name
type: PropertyValue
value: Major

Beethoven's Cellists
type: MusicAlbum
date published: 2018

Verspielt
type: MusicAlbum
date published: 2020

Verspielt
type: MusicAlbum
date published: 2020

I and Thou
type: MusicAlbum
date published: 2023-02-10

I and Thou
type: MusicAlbum
date published: 2023-02-10