Change+Check Choir
type: MusicGroup
popularity: 11
followers: 544
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xcc0fd59e460cc97769e283c335cd266db4fc934fd8d69fcd4e0bfabbc2c17c5d
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953770
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953770
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c3e9afc8-220f-4619-9bce-a2df6c79f3ec.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c3e9afc8-220f-4619-9bce-a2df6c79f3ec.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/c3e9afc8-220f-4619-9bce-a2df6c79f3ec
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T09:50:11Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xcc0fd59e460cc97769e283c335cd266db4fc934fd8d69fcd4e0bfabbc2c17c5d","name":"Change+Check Choir","registered_at":"2026-06-15T01:04:13Z","symbol":"NIM0633329","token_address":"0x282bf87456b25cdd4795bc21ebd8911602fead9a","type":"artist","uuid":"c3e9afc8-220f-4619-9bce-a2df6c79f3ec"}
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 0xcc0fd59e460cc97769e283c335cd266db4fc934fd8d69fcd4e0bfabbc2c17c5d. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c3e9afc8-220f-4619-9bce-a2df6c79f3ec.json and https://artists.proofprofile.net/proofs/artist/c3e9afc8-220f-4619-9bce-a2df6c79f3ec.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T10:33:29Z
  text: {"copyright_id":"0xcc0fd59e460cc97769e283c335cd266db4fc934fd8d69fcd4e0bfabbc2c17c5d","name":"Change+Check Choir","registered_at":"2026-06-15T01:04:13Z","symbol":"NIM0633329","token_address":"0x282bf87456b25cdd4795bc21ebd8911602fead9a","type":"artist","uuid":"c3e9afc8-220f-4619-9bce-a2df6c79f3ec"}
album: Golden
  type: MusicAlbum
  date published: 2023-11-10
  track: Golden
    type: MusicRecording
    duration: PT4M2S
    duration ms: 242448
    explicit: false
    by artist: Change+Check Choir
    in album: Golden
      type: MusicAlbum
      date published: 2023-11-10
    isrc code: UKW3Z2302949
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-14T19:05:35+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xf66fe6eb4a3ffbe6e3f14e84670abd21d493eeba68e97230e39b3c61b4e5ca36
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958054
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958054
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKW3Z2302949
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-14T19:33:24Z
    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 0xf66fe6eb4a3ffbe6e3f14e84670abd21d493eeba68e97230e39b3c61b4e5ca36. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/UKW3Z2302949.
      date published: 2026-07-14T19:33:24Z
    audio: Golden
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 98.003
      additional property: Musical Key
        type: PropertyValue
        value: 4
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.612
      additional property: Energy
        type: PropertyValue
        value: 0.769
      additional property: Speechiness
        type: PropertyValue
        value: 0.031
      additional property: Acousticness
        type: PropertyValue
        value: 0.352
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.101
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.271
      additional property: Loudness (dB)
        type: PropertyValue
        value: -2.729
      additional property: Key Name
        type: PropertyValue
        value: E
      additional property: Mode Name
        type: PropertyValue
        value: Major