MATTHEW KERR
type: MusicGroup
popularity: 2
followers: 406
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xff62e76a14ae4e1869e00ee8eb393c96c33b10fd54dd2d1f05d7b3a5ab71d57d
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954647
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954647
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/d70754e0-cc6b-4b31-bfbe-b6c62dab190f.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/d70754e0-cc6b-4b31-bfbe-b6c62dab190f.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/d70754e0-cc6b-4b31-bfbe-b6c62dab190f
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T04:36:58Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xff62e76a14ae4e1869e00ee8eb393c96c33b10fd54dd2d1f05d7b3a5ab71d57d","name":"MATTHEW KERR","registered_at":"2026-06-21T03:23:43Z","symbol":"NIM1801192","token_address":"0x4534d1694a5dd4aa0cbac9466994b928e919831e","type":"artist","uuid":"d70754e0-cc6b-4b31-bfbe-b6c62dab190f"}
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 0xff62e76a14ae4e1869e00ee8eb393c96c33b10fd54dd2d1f05d7b3a5ab71d57d. Chain 2 (Bitcoin): anchored in block 954647 (2026-06-21T04:36:58Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d70754e0-cc6b-4b31-bfbe-b6c62dab190f.json and https://artists.proofprofile.net/proofs/artist/d70754e0-cc6b-4b31-bfbe-b6c62dab190f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T04:36:58Z
  text: {"copyright_id":"0xff62e76a14ae4e1869e00ee8eb393c96c33b10fd54dd2d1f05d7b3a5ab71d57d","name":"MATTHEW KERR","registered_at":"2026-06-21T03:23:43Z","symbol":"NIM1801192","token_address":"0x4534d1694a5dd4aa0cbac9466994b928e919831e","type":"artist","uuid":"d70754e0-cc6b-4b31-bfbe-b6c62dab190f"}
album: Smile On
  type: MusicAlbum
  date published: 2018-04-14
album: I Wrote These Songs So That You Might Love Me
  type: MusicAlbum
  date published: 2018-04-14
album: Villains
  type: MusicAlbum
  date published: 2018-04-14
track: Rosa Dourada

Rosa Dourada
type: MusicRecording
duration: PT9M2S
duration ms: 542462
explicit: false
by artist: Niní Gallón
by artist: Marcos Carvalho
by artist: MATTHEW KERR
by artist: Gu Vieira
in album: Pra Voar
  type: MusicAlbum
  date published: 2023-01-05
isrc code: BX2M52100005
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-27T15:51:38+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x705ee0ec0bab10e39971030cad302333bebbbfeb56ec47d82f4a067053e0902e
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956304
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956304
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BX2M52100005
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-02T03:55:08+00:00
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
additional property: ProofProfileEvidenceStatus
  type: PropertyValue
  value: verified-cc-db-prod
additional property: TokenDeploymentConfirmed
  type: PropertyValue
  value: true
additional property: ContentHash
additional property: BitcoinBlock
  type: PropertyValue
  value: 956304
additional property: BitcoinTime
  type: PropertyValue
  value: 2026-07-02T03:55:08+00:00
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705ee0ec0bab10e39971030cad302333bebbbfeb56ec47d82f4a067053e0902e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BX2M52100005.
  date published: 2026-07-02T11:34:59Z
audio: Rosa Dourada
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 123.397
  additional property: Musical Key
    type: PropertyValue
    value: 4
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.348
  additional property: Energy
    type: PropertyValue
    value: 0.265
  additional property: Speechiness
    type: PropertyValue
    value: 0.032
  additional property: Acousticness
    type: PropertyValue
    value: 0.841
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.174
  additional property: Liveness
    type: PropertyValue
    value: 0.088
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.153
  additional property: Loudness (dB)
    type: PropertyValue
    value: -17.344
  additional property: Key Name
    type: PropertyValue
    value: E
  additional property: Mode Name
    type: PropertyValue
    value: Major