Playground Trio
type: MusicGroup
popularity: 7
followers: 179
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xacd230b64dd10b85fdd550eb4836400ed3e5905a4a62230fdde47be6b6c73abf
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/5f9844d0-4852-4ddf-acc7-e0705aff2794.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/5f9844d0-4852-4ddf-acc7-e0705aff2794.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/5f9844d0-4852-4ddf-acc7-e0705aff2794
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xacd230b64dd10b85fdd550eb4836400ed3e5905a4a62230fdde47be6b6c73abf","name":"Playground Trio","registered_at":"2026-06-16T22:56:15Z","symbol":"NIM1201856","token_address":"0x867d9bf52d1eebcabb71d74e34ee9d774e850ab8","type":"artist","uuid":"5f9844d0-4852-4ddf-acc7-e0705aff2794"}
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd230b64dd10b85fdd550eb4836400ed3e5905a4a62230fdde47be6b6c73abf. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5f9844d0-4852-4ddf-acc7-e0705aff2794.json and https://artists.proofprofile.net/proofs/artist/5f9844d0-4852-4ddf-acc7-e0705aff2794.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0xacd230b64dd10b85fdd550eb4836400ed3e5905a4a62230fdde47be6b6c73abf","name":"Playground Trio","registered_at":"2026-06-16T22:56:15Z","symbol":"NIM1201856","token_address":"0x867d9bf52d1eebcabb71d74e34ee9d774e850ab8","type":"artist","uuid":"5f9844d0-4852-4ddf-acc7-e0705aff2794"}
album: געגוע
  type: MusicAlbum
  date published: 2024-04-10
album: קהילה
  type: MusicAlbum
  date published: 2024-04-26
album: Julia
  type: MusicAlbum
  date published: 2024-10-25
album: Twenty Six
  type: MusicAlbum
  date published: 2024-11-08
album: A Sign of Life
  type: MusicAlbum
  date published: 2024-11-29
  track: One Third of Our Life
    type: MusicRecording
    duration: PT3M27S
    duration ms: 207692
    explicit: false
    by artist: Playground Trio
    in album: A Sign of Life
      type: MusicAlbum
      date published: 2024-11-29
    isrc code: SE6SA2466434
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-20T17:56:48+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x1f42ec4268db3bec68d67559e72ec7f6a49bfc2411e638c43c52f9cc9bd1e992
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958920
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958920
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE6SA2466434
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-20T18:14:22Z
    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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f42ec4268db3bec68d67559e72ec7f6a49bfc2411e638c43c52f9cc9bd1e992. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE6SA2466434 — a six-check JSON result.
      date published: 2026-07-20T18:14:22Z
    audio: One Third of Our Life
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 119.603
      additional property: Musical Key
        type: PropertyValue
        value: 8
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.594
      additional property: Energy
        type: PropertyValue
        value: 0.357
      additional property: Speechiness
        type: PropertyValue
        value: 0.036
      additional property: Acousticness
        type: PropertyValue
        value: 0.828
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.824
      additional property: Liveness
        type: PropertyValue
        value: 0.199
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.519
      additional property: Loudness (dB)
        type: PropertyValue
        value: -11.819
      additional property: Key Name
        type: PropertyValue
        value: Ab
      additional property: Mode Name
        type: PropertyValue
        value: Major
  track: Spoonful
    type: MusicRecording
    duration: PT3M38S
    duration ms: 218345
    explicit: false
    by artist: Playground Trio
    in album: A Sign of Life
      type: MusicAlbum
      date published: 2024-11-29
    isrc code: SE6SA2466437
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-05T22:38:52+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x1a71d969267e89c4ac7b82f64e7744b33f02baa58a94703f7a36c50ffd11508c
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956856
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956856
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE6SA2466437
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-06T01:25:57Z
    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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a71d969267e89c4ac7b82f64e7744b33f02baa58a94703f7a36c50ffd11508c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE6SA2466437 — a six-check JSON result.
      date published: 2026-07-06T01:25:57Z
    audio: Spoonful
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 124.069
      additional property: Musical Key
        type: PropertyValue
        value: 0
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.551
      additional property: Energy
        type: PropertyValue
        value: 0.442
      additional property: Speechiness
        type: PropertyValue
        value: 0.032
      additional property: Acousticness
        type: PropertyValue
        value: 0.894
      additional property: Instrumentalness
      additional property: Liveness
      additional property: Valence (Positivity)
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name

Instrumentalness
type: PropertyValue
value: 0.934

Liveness
type: PropertyValue
value: 0.102

Valence (Positivity)
type: PropertyValue
value: 0.455

Loudness (dB)
type: PropertyValue
value: -9.486

Key Name
type: PropertyValue
value: C

Mode Name
type: PropertyValue
value: Minor