Arthur Kai
type: MusicGroup
genre: nova mpb
popularity: 3
followers: 334
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x747bd6755143f069a71a7b30c55bc2d8b2a70273b5e50e59a08a584230ae21cf
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954065
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954065
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/445e9093-05f5-49a5-9c01-6c0331729674.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/445e9093-05f5-49a5-9c01-6c0331729674.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/445e9093-05f5-49a5-9c01-6c0331729674
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:10:43Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x747bd6755143f069a71a7b30c55bc2d8b2a70273b5e50e59a08a584230ae21cf","name":"Arthur Kai","registered_at":"2026-06-16T13:22:04Z","symbol":"NIM1064851","token_address":"0xae9e8bb22a2a49aea304e997d966abe616880d41","type":"artist","uuid":"445e9093-05f5-49a5-9c01-6c0331729674"}
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 0x747bd6755143f069a71a7b30c55bc2d8b2a70273b5e50e59a08a584230ae21cf. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/445e9093-05f5-49a5-9c01-6c0331729674.json and https://artists.proofprofile.net/proofs/artist/445e9093-05f5-49a5-9c01-6c0331729674.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:10:43Z
  text: {"copyright_id":"0x747bd6755143f069a71a7b30c55bc2d8b2a70273b5e50e59a08a584230ae21cf","name":"Arthur Kai","registered_at":"2026-06-16T13:22:04Z","symbol":"NIM1064851","token_address":"0xae9e8bb22a2a49aea304e997d966abe616880d41","type":"artist","uuid":"445e9093-05f5-49a5-9c01-6c0331729674"}
album: Oi Sumida
  type: MusicAlbum
  date published: 2022-01-21
album: Nessa Vida
  type: MusicAlbum
  date published: 2023-02-05
album: Um Bom Marujo
  type: MusicAlbum
  date published: 2024-07-03
album: Verão
  type: MusicAlbum
  date published: 2024-12-26
album: Saia da Rotina
  type: MusicAlbum
  date published: 2025-03-28
album: Saia Da Rotina
  type: MusicAlbum
  date published: 2025-03-28
album: Viver pra ver
  type: MusicAlbum
  date published: 2025-08-01
  track: Viver pra ver
    type: MusicRecording
    duration: PT3M0S
    duration ms: 180608
    explicit: false
    by artist: Arthur Kai
    in album: Viver pra ver
      type: MusicAlbum
      date published: 2025-08-01
    genre: nova mpb
    isrc code: BC9HT2500002
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-19T03:14:20+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x9b0916ed5668f3dcb077a672715bcc534fc4363ac1f1d656164a7ee107e0659d
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958650
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958650
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BC9HT2500002
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-19T03:36:41Z
    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 0x9b0916ed5668f3dcb077a672715bcc534fc4363ac1f1d656164a7ee107e0659d. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/BC9HT2500002.
      date published: 2026-07-19T03:36:41Z
    audio: Viver pra ver
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 148.063
      additional property: Musical Key
        type: PropertyValue
        value: 2
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.563
      additional property: Energy
        type: PropertyValue
        value: 0.621
      additional property: Speechiness
        type: PropertyValue
        value: 0.04
      additional property: Acousticness
        type: PropertyValue
        value: 0.096
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.052
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.605
      additional property: Loudness (dB)
        type: PropertyValue
        value: -8.345
      additional property: Key Name
        type: PropertyValue
        value: D
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: É tão fácil te amar
  type: MusicAlbum
  date published: 2025-09-19
  track: É tão fácil te amar
    type: MusicRecording
    duration: PT2M37S
    duration ms: 157560
    explicit: false
    by artist: Arthur Kai
    in album: É tão fácil te amar
      type: MusicAlbum
      date published: 2025-09-19
    genre: nova mpb
    isrc code: BC9HT2500003
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-18T09:59:21+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xc90e91bf8c4fe2055cc736c8aba5ade39be53ad22c628bf773d2da8e547e128f
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958538
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958538
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BC9HT2500003
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-18T10:30:13Z
    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 0xc90e91bf8c4fe2055cc736c8aba5ade39be53ad22c628bf773d2da8e547e128f. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/BC9HT2500003.
      date published: 2026-07-18T10:30:13Z
    audio: É tão fácil te amar
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 88.105
      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
      additional property: Energy
      additional property: Speechiness
      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

Danceability
type: PropertyValue
value: 0.664

Energy
type: PropertyValue
value: 0.519

Speechiness
type: PropertyValue
value: 0.032

Acousticness
type: PropertyValue
value: 0.314

Instrumentalness
type: PropertyValue
value: 0

Liveness
type: PropertyValue
value: 0.163

Valence (Positivity)
type: PropertyValue
value: 0.555

Loudness (dB)
type: PropertyValue
value: -6.896

Key Name
type: PropertyValue
value: C#

Mode Name
type: PropertyValue
value: Major