Callandre
type: MusicGroup
popularity: 6
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xd80aacc2cb2e073f63e966f750159ddb59c0d796b7f644d6e6e254a0dfdeb3b4
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953999
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953999
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/31b90696-88c3-4296-8bfb-00123b54a774.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/31b90696-88c3-4296-8bfb-00123b54a774.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/31b90696-88c3-4296-8bfb-00123b54a774
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T20:20:58Z
additional property: OTSCanonicalRecord
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 0xd80aacc2cb2e073f63e966f750159ddb59c0d796b7f644d6e6e254a0dfdeb3b4. Chain 2 (Bitcoin): anchored in block 953999 (2026-06-16T20:20:58Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/31b90696-88c3-4296-8bfb-00123b54a774.json and https://artists.proofprofile.net/proofs/artist/31b90696-88c3-4296-8bfb-00123b54a774.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T20:20:58Z
album: Silent
  type: MusicAlbum
  date published: 2025-03-31
album: Alley Echoes
  type: MusicAlbum
  date published: 2025-06-22
  track: Alley Echoes
    type: MusicRecording
    duration: PT1M7S
    duration ms: 67030
    explicit: false
    by artist: Callandre
    in album: Alley Echoes
      type: MusicAlbum
      date published: 2025-06-22
    isrc code: GX53U2590671
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-15T19:42:09+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xdb0bdaabdbfe2b7c7fd1ce3a371421ab49abb0595de85d6d21f959f946cc18c0
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958196
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958196
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX53U2590671
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-15T22:44:38Z
    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 0xdb0bdaabdbfe2b7c7fd1ce3a371421ab49abb0595de85d6d21f959f946cc18c0. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:44:38Z), 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/GX53U2590671.
      date published: 2026-07-15T22:44:38Z
    audio: Alley Echoes
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 172.105
      additional property: Musical Key
        type: PropertyValue
        value: 6
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.625
      additional property: Energy
        type: PropertyValue
        value: 0.317
      additional property: Speechiness
        type: PropertyValue
        value: 0.069
      additional property: Acousticness
        type: PropertyValue
        value: 0.923
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.659
      additional property: Liveness
        type: PropertyValue
        value: 0.091
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.932
      additional property: Loudness (dB)
        type: PropertyValue
        value: -12.658
      additional property: Key Name
        type: PropertyValue
        value: F#
      additional property: Mode Name
        type: PropertyValue
        value: Minor