De Calm
type: MusicGroup
popularity: 2
followers: 142
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xe99448e0956ff60bc64e140b4f54f32b50f0fc990375ae55d0f0491306c30896
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954342
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954342
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/8e819360-4678-463f-b6bd-71d05653db28.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/8e819360-4678-463f-b6bd-71d05653db28.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/8e819360-4678-463f-b6bd-71d05653db28
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-19T03:22:39Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xe99448e0956ff60bc64e140b4f54f32b50f0fc990375ae55d0f0491306c30896","name":"De Calm","registered_at":"2026-06-17T15:24:27Z","symbol":"NIM1437493","token_address":"0x010382138a36f99e5dbf3171be87c69e4c55a5ff","type":"artist","uuid":"8e819360-4678-463f-b6bd-71d05653db28"}
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 0xe99448e0956ff60bc64e140b4f54f32b50f0fc990375ae55d0f0491306c30896. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8e819360-4678-463f-b6bd-71d05653db28.json and https://artists.proofprofile.net/proofs/artist/8e819360-4678-463f-b6bd-71d05653db28.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:22:39Z
  text: {"copyright_id":"0xe99448e0956ff60bc64e140b4f54f32b50f0fc990375ae55d0f0491306c30896","name":"De Calm","registered_at":"2026-06-17T15:24:27Z","symbol":"NIM1437493","token_address":"0x010382138a36f99e5dbf3171be87c69e4c55a5ff","type":"artist","uuid":"8e819360-4678-463f-b6bd-71d05653db28"}
album: Les plongeoirs
  type: MusicAlbum
  date published: 2013-05-20
album: Amour Athlétic Club
  type: MusicAlbum
  date published: 2013-11-11
album: Alligator
  type: MusicAlbum
  date published: 2017-03-10
album: Disparue Juliette
  type: MusicAlbum
  date published: 2017-03-31
  track: Les vainqueurs
    type: MusicRecording
    duration: PT3M28S
    duration ms: 208240
    explicit: false
    by artist: De Calm
    in album: Disparue Juliette
      type: MusicAlbum
      date published: 2017-03-31
    isrc code: FR9W11701096
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-06T01:11:15+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xc44a5b01782e427de7e6f72405128ab6b4567229709b65ae137272f98b84db97
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956857
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956857
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR9W11701096
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-06T01:26:17Z
    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 0xc44a5b01782e427de7e6f72405128ab6b4567229709b65ae137272f98b84db97. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/FR9W11701096.
      date published: 2026-07-06T01:26:17Z
    audio: Les vainqueurs
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 125.012
      additional property: Musical Key
        type: PropertyValue
        value: 5
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.625
      additional property: Energy
        type: PropertyValue
        value: 0.712
      additional property: Speechiness
        type: PropertyValue
        value: 0.028
      additional property: Acousticness
        type: PropertyValue
        value: 0.001
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.012
      additional property: Liveness
        type: PropertyValue
        value: 0.08
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.533
      additional property: Loudness (dB)
        type: PropertyValue
        value: -10.079
      additional property: Key Name
        type: PropertyValue
        value: F
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Juliette
  type: MusicAlbum
  date published: 2025-06-27