Modern Playground
type: MusicGroup
popularity: 2
followers: 25
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xdf9182c56e0b893c18d9cac96fab3ca6bae791524b5e58fb9cea9c1d410e5d5c
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954066
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954066
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7761847c-6ca5-4c51-8e11-f1c0ac62ef7b.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7761847c-6ca5-4c51-8e11-f1c0ac62ef7b.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/7761847c-6ca5-4c51-8e11-f1c0ac62ef7b
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xdf9182c56e0b893c18d9cac96fab3ca6bae791524b5e58fb9cea9c1d410e5d5c","name":"Modern Playground","registered_at":"2026-06-17T07:13:54Z","symbol":"NIM1320605","token_address":"0x3eb75004b7e051f43445cef79f43765b3add9910","type":"artist","uuid":"7761847c-6ca5-4c51-8e11-f1c0ac62ef7b"}
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 0xdf9182c56e0b893c18d9cac96fab3ca6bae791524b5e58fb9cea9c1d410e5d5c. Chain 2 (Bitcoin): anchored in block 954115 (2026-06-17T15:44:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7761847c-6ca5-4c51-8e11-f1c0ac62ef7b.json and https://artists.proofprofile.net/proofs/artist/7761847c-6ca5-4c51-8e11-f1c0ac62ef7b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T15:44:10Z
  text: {"copyright_id":"0xdf9182c56e0b893c18d9cac96fab3ca6bae791524b5e58fb9cea9c1d410e5d5c","name":"Modern Playground","registered_at":"2026-06-17T07:13:54Z","symbol":"NIM1320605","token_address":"0x3eb75004b7e051f43445cef79f43765b3add9910","type":"artist","uuid":"7761847c-6ca5-4c51-8e11-f1c0ac62ef7b"}
album: MaNia
  type: MusicAlbum
  date published: 2025-05-09
  track: MaNia
    type: MusicRecording
    duration: PT4M42S
    duration ms: 282357
    explicit: false
    by artist: Modern Playground
    in album: MaNia
      type: MusicAlbum
      date published: 2025-05-09
    isrc code: QZNWU2566669
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-20T02:00:48+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x9b36e6ebcf307052ac07d23382d97c36533c3a49bd53b1528d29902c9faf28f3
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958805
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958805
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWU2566669
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-20T05:02:26Z
    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 0x9b36e6ebcf307052ac07d23382d97c36533c3a49bd53b1528d29902c9faf28f3. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:02:26Z), 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/QZNWU2566669.
      date published: 2026-07-20T05:02:26Z
    audio: MaNia
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 125.839
      additional property: Musical Key
        type: PropertyValue
        value: 8
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.65
      additional property: Energy
        type: PropertyValue
        value: 0.85
      additional property: Speechiness
        type: PropertyValue
        value: 0.028
      additional property: Acousticness
        type: PropertyValue
        value: 0.104
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.374
      additional property: Liveness
        type: PropertyValue
        value: 0.13
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.716
      additional property: Loudness (dB)
        type: PropertyValue
        value: -6.12
      additional property: Key Name
        type: PropertyValue
        value: Ab
      additional property: Mode Name
        type: PropertyValue
        value: Minor