Blum
type: MusicGroup
description: BLUM was a contemporary art gallery located in Los Angeles, Tokyo, and New York. alt=BLUM Los Angeles|thumb|BLUM Los Angeles thumb|BLUM New York History BLUM represents more than sixty artists and e
popularity: 4
followers: 47
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x247844de809426239c364bd228a7b7f8585207121ca679e509c819483b04d28b
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/851323e5-fb87-47c8-8f80-e13dd9814765.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/851323e5-fb87-47c8-8f80-e13dd9814765.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/851323e5-fb87-47c8-8f80-e13dd9814765
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-19T03:22:39Z
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 0x247844de809426239c364bd228a7b7f8585207121ca679e509c819483b04d28b. 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/851323e5-fb87-47c8-8f80-e13dd9814765.json and https://artists.proofprofile.net/proofs/artist/851323e5-fb87-47c8-8f80-e13dd9814765.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:22:39Z
album: Observateur
  type: MusicAlbum
  date published: 2016-10-14
album: Simulacre
  type: MusicAlbum
  date published: 2018-12-14
album: Humeur exécrable
  type: MusicAlbum
  date published: 2018-12-14
album: Rouge et blanc
  type: MusicAlbum
  date published: 2018-12-14
album: Loup solitaire
  type: MusicAlbum
  date published: 2018-12-14
album: Cœur sur la table
  type: MusicAlbum
  date published: 2018-12-14
album: Tous unis
  type: MusicAlbum
  date published: 2025-04-29
  track: Tous unis
    type: MusicRecording
    duration: PT2M52S
    duration ms: 172583
    explicit: false
    by artist: Blum
    in album: Tous unis
      type: MusicAlbum
      date published: 2025-04-29
    isrc code: TCAJP2561741
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-20T08:41:08+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x2b7d55a54e526285c5a12bbb2af60566178300368afed02e98837b88e8670673
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958853
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958853
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAJP2561741
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-20T11:45:14Z
    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 0x2b7d55a54e526285c5a12bbb2af60566178300368afed02e98837b88e8670673. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:45:14Z), 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/TCAJP2561741.
      date published: 2026-07-20T11:45:14Z
    audio: Tous unis
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 87.612
      additional property: Musical Key
        type: PropertyValue
        value: 11
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.409
      additional property: Energy
        type: PropertyValue
        value: 0.664
      additional property: Speechiness
        type: PropertyValue
        value: 0.468
      additional property: Acousticness
        type: PropertyValue
        value: 0.097
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.444
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.258
      additional property: Loudness (dB)
        type: PropertyValue
        value: -8.636
      additional property: Key Name
        type: PropertyValue
        value: B
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: Punchlife 3
  type: MusicAlbum
  date published: 2025-04-30
album: Sac à dos
  type: MusicAlbum
  date published: 2025-07-11
album: Maëla
  type: MusicAlbum
  date published: 2025-10-17