Marcoproject
type: MusicGroup
popularity: 6
followers: 12
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xe7595377e427bcd7a9c5eb32dda7bab607a7c75a92d5575869a48096697ecd4a
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954553
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954553
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ac9d5eaf-ef43-4b14-9fb7-327b82fc45ae.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ac9d5eaf-ef43-4b14-9fb7-327b82fc45ae.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/ac9d5eaf-ef43-4b14-9fb7-327b82fc45ae
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T11:51:30Z
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 0xe7595377e427bcd7a9c5eb32dda7bab607a7c75a92d5575869a48096697ecd4a. Chain 2 (Bitcoin): anchored in block 954553 (2026-06-20T11:51:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac9d5eaf-ef43-4b14-9fb7-327b82fc45ae.json and https://artists.proofprofile.net/proofs/artist/ac9d5eaf-ef43-4b14-9fb7-327b82fc45ae.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T11:51:30Z
album: Humanoide
  type: MusicAlbum
  date published: 2021-06-05
  track: Humanoide
    type: MusicRecording
    duration: PT4M46S
    duration ms: 286466
    explicit: false
    by artist: Marcoproject
    in album: Humanoide
      type: MusicAlbum
      date published: 2021-06-05
    isrc code: QZHZ52145547
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-14T23:42:45+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x66bbb02bec311edcf4f5fcfaf476215f5d3610347b9a0bcfe686cdad9ac5c3f3
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958086
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958086
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHZ52145547
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-15T02:55:47Z
    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 0x66bbb02bec311edcf4f5fcfaf476215f5d3610347b9a0bcfe686cdad9ac5c3f3. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZHZ52145547.
      date published: 2026-07-15T02:55:47Z
    audio: Humanoide
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 124.011
      additional property: Musical Key
        type: PropertyValue
        value: 1
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.806
      additional property: Energy
        type: PropertyValue
        value: 0.384
      additional property: Speechiness
        type: PropertyValue
        value: 0.078
      additional property: Acousticness
        type: PropertyValue
        value: 0.073
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.858
      additional property: Liveness
        type: PropertyValue
        value: 0.212
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.404
      additional property: Loudness (dB)
        type: PropertyValue
        value: -16.958
      additional property: Key Name
        type: PropertyValue
        value: C#
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Aggressive Rhythm
  type: MusicAlbum
  date published: 2023-02-17