Matt Gretzky
type: MusicGroup
genre: memphis rap
popularity: 4
followers: 71
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xb6875f44740b15712a478367dd1a6da5f52f0e2b8435c2aed479462abf614924
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/83c9ebff-35c5-48fe-8795-9eeba5c76533.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/83c9ebff-35c5-48fe-8795-9eeba5c76533.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/83c9ebff-35c5-48fe-8795-9eeba5c76533
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-19T03:22:39Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xb6875f44740b15712a478367dd1a6da5f52f0e2b8435c2aed479462abf614924","name":"Matt Gretzky","registered_at":"2026-06-17T11:38:38Z","symbol":"NIM1383700","token_address":"0xfc326edaea3dc98fee3ddfdbb7d2eee452d76edf","type":"artist","uuid":"83c9ebff-35c5-48fe-8795-9eeba5c76533"}
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 0xb6875f44740b15712a478367dd1a6da5f52f0e2b8435c2aed479462abf614924. 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/83c9ebff-35c5-48fe-8795-9eeba5c76533.json and https://artists.proofprofile.net/proofs/artist/83c9ebff-35c5-48fe-8795-9eeba5c76533.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:22:39Z
  text: {"copyright_id":"0xb6875f44740b15712a478367dd1a6da5f52f0e2b8435c2aed479462abf614924","name":"Matt Gretzky","registered_at":"2026-06-17T11:38:38Z","symbol":"NIM1383700","token_address":"0xfc326edaea3dc98fee3ddfdbb7d2eee452d76edf","type":"artist","uuid":"83c9ebff-35c5-48fe-8795-9eeba5c76533"}
album: Saturday Night
  type: MusicAlbum
  date published: 2016-10-06
album: Saturday Night
  type: MusicAlbum
  date published: 2016-10-06
album: Jeffery After Dark
  type: MusicAlbum
  date published: 2020-09-14
  track: Jeffery After Dark
    type: MusicRecording
    duration: PT3M40S
    duration ms: 220904
    explicit: true
    by artist: Matt Gretzky
    in album: Jeffery After Dark
      type: MusicAlbum
      date published: 2020-09-14
    genre: memphis rap
    isrc code: QZNB82025405
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-04T11:21:13+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x058f914bfc1635d821f7ff579bad9fc5a5343a345440ae83b543f282d384e080
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956725
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956725
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNB82025405
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-05T01:12:41Z
    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 0x058f914bfc1635d821f7ff579bad9fc5a5343a345440ae83b543f282d384e080. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNB82025405.
      date published: 2026-07-05T01:12:41Z
    audio: Jeffery After Dark
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 141.6
      additional property: Musical Key
        type: PropertyValue
        value: 6
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.775
      additional property: Energy
        type: PropertyValue
        value: 0.714
      additional property: Speechiness
        type: PropertyValue
        value: 0.273
      additional property: Acousticness
        type: PropertyValue
        value: 0.51
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.118
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.454
      additional property: Loudness (dB)
        type: PropertyValue
        value: -5.822
      additional property: Key Name
        type: PropertyValue
        value: F#
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Goodnight
  type: MusicAlbum
  date published: 2020-09-14
album: Goodnight
  type: MusicAlbum
  date published: 2020-09-14
  track: Goodnight
    type: MusicRecording
    duration: PT2M18S
    duration ms: 138196
    explicit: true
    by artist: Matt Gretzky
    in album: Goodnight
      type: MusicAlbum
      date published: 2020-09-14
    genre: memphis rap
    isrc code: QZNB82030900
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-21T10:33:50+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xb6182c184762f5ad46ae60397437f5af7c635ce2a70734d6e14eb4122bde9fc9
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958996
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958996
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNB82030900
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-21T10:57:35Z
    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 0xb6182c184762f5ad46ae60397437f5af7c635ce2a70734d6e14eb4122bde9fc9. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/QZNB82030900.
      date published: 2026-07-21T10:57:35Z
    audio: Goodnight
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 143.291
      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: 0.888
      additional property: Energy
        type: PropertyValue
        value: 0.59
      additional property: Speechiness
        type: PropertyValue
        value: 0.288
      additional property: Acousticness
      additional property: Instrumentalness
      additional property: Liveness
      additional property: Valence (Positivity)
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name
album: Playaz Night Out
album: Walkin Talkin Cash $hit

Acousticness
type: PropertyValue
value: 0.004

Instrumentalness
type: PropertyValue
value: 0

Liveness
type: PropertyValue
value: 0.334

Valence (Positivity)
type: PropertyValue
value: 0.424

Loudness (dB)
type: PropertyValue
value: -10.824

Key Name
type: PropertyValue
value: Ab

Mode Name
type: PropertyValue
value: Major

Jeffery After Dark
type: MusicAlbum
date published: 2020-09-14

Playaz Night Out
type: MusicAlbum
date published: 2021-04-09

Playaz Night Out
type: MusicAlbum
date published: 2021-04-09

Walkin Talkin Cash $hit
type: MusicAlbum
date published: 2021-07-09