Calvin.
type: MusicGroup
popularity: 4
followers: 161
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x298b49d137db1fe7b0cad2362dd4f361d10a951f477cce7da343e1b0bcf4c32d
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954055
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954055
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/440d9da4-1bd4-42bf-9cdf-12b890fec747.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/440d9da4-1bd4-42bf-9cdf-12b890fec747.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/440d9da4-1bd4-42bf-9cdf-12b890fec747
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T05:51:24Z
additional property: OTSCanonicalRecord
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 0x298b49d137db1fe7b0cad2362dd4f361d10a951f477cce7da343e1b0bcf4c32d. Chain 2 (Bitcoin): anchored in block 954055 (2026-06-17T05:51:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/440d9da4-1bd4-42bf-9cdf-12b890fec747.json and https://artists.proofprofile.net/proofs/artist/440d9da4-1bd4-42bf-9cdf-12b890fec747.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T05:51:24Z
album: 5am
  type: MusicAlbum
  date published: 2019-12-17
  track: 5am
    type: MusicRecording
    duration: PT2M44S
    duration ms: 164048
    explicit: true
    by artist: Calvin.
    in album: 5am
      type: MusicAlbum
      date published: 2019-12-17
    isrc code: QZK6N1906264
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-03T22:37:21+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x77d91f397d607936a260bb7dccf74c7d28fe07e707c012e38ef22b3fdd518ce1
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956634
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956634
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6N1906264
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-04T10:04:33Z
    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 0x77d91f397d607936a260bb7dccf74c7d28fe07e707c012e38ef22b3fdd518ce1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZK6N1906264.
      date published: 2026-07-04T10:04:33Z
    audio: 5am
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 95.956
      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: 0.885
      additional property: Energy
        type: PropertyValue
        value: 0.413
      additional property: Speechiness
        type: PropertyValue
        value: 0.111
      additional property: Acousticness
        type: PropertyValue
        value: 0.68
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.128
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.378
      additional property: Loudness (dB)
        type: PropertyValue
        value: -6.081
      additional property: Key Name
        type: PropertyValue
        value: C
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: Next to Me
  type: MusicAlbum
  date published: 2019-12-24
album: Real Ones
  type: MusicAlbum
  date published: 2019-12-24
album: Perfect Timing
  type: MusicAlbum
  date published: 2020-01-07
album: Buss Down
  type: MusicAlbum
  date published: 2020-02-26
album: Out My Way
  type: MusicAlbum
  date published: 2020-03-03
album: Spend Some
  type: MusicAlbum
  date published: 2020-06-10
album: Still Think About You
  type: MusicAlbum
  date published: 2020-06-19
album: Major League
  type: MusicAlbum
  date published: 2020-08-05
album: Game
  type: MusicAlbum
  date published: 2020-08-24
album: Pressure
  type: MusicAlbum
  date published: 2020-09-30
album: ICON
  type: MusicAlbum
  date published: 2020-11-20
album: Feels Good
  type: MusicAlbum
  date published: 2021-03-07
album: Go Baby
  type: MusicAlbum
  date published: 2021-03-11
album: We Out
  type: MusicAlbum
  date published: 2021-04-20
album: Take You Out
  type: MusicAlbum
  date published: 2022-08-10