Kerolin Ferreira
type: MusicGroup
popularity: 3
followers: 65
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x2b2eb05f54ad8bcab3b80d8deae8053e6aaf0c04f877c5b63a3c636e5a0d7535
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953975
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953975
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2a96655f-d085-4d84-8527-dfc886b4ecfa.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2a96655f-d085-4d84-8527-dfc886b4ecfa.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/2a96655f-d085-4d84-8527-dfc886b4ecfa
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T16:53:41Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x2b2eb05f54ad8bcab3b80d8deae8053e6aaf0c04f877c5b63a3c636e5a0d7535","name":"Kerolin Ferreira","registered_at":"2026-06-16T04:40:32Z","symbol":"NIM0940375","token_address":"0xb12dc820afdcd8f5d8b8e0ace255d64dce788c57","type":"artist","uuid":"2a96655f-d085-4d84-8527-dfc886b4ecfa"}
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 0x2b2eb05f54ad8bcab3b80d8deae8053e6aaf0c04f877c5b63a3c636e5a0d7535. Chain 2 (Bitcoin): anchored in block 954014 (2026-06-16T22:46:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2a96655f-d085-4d84-8527-dfc886b4ecfa.json and https://artists.proofprofile.net/proofs/artist/2a96655f-d085-4d84-8527-dfc886b4ecfa.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T22:46:20Z
  text: {"copyright_id":"0x2b2eb05f54ad8bcab3b80d8deae8053e6aaf0c04f877c5b63a3c636e5a0d7535","name":"Kerolin Ferreira","registered_at":"2026-06-16T04:40:32Z","symbol":"NIM0940375","token_address":"0xb12dc820afdcd8f5d8b8e0ace255d64dce788c57","type":"artist","uuid":"2a96655f-d085-4d84-8527-dfc886b4ecfa"}
album: A Porta É Estreita
  type: MusicAlbum
  date published: 2022-02-25
  track: A Porta É Estreita
    type: MusicRecording
    duration: PT4M2S
    duration ms: 242580
    explicit: false
    by artist: Kerolin Ferreira
    in album: A Porta É Estreita
      type: MusicAlbum
      date published: 2022-02-25
    isrc code: QZGLM2298812
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-17T16:19:06+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x8b7726b2fb2fee919ccb0433f04e7d661769ce0b6b2064107f9672b9ff0fff0a
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958444
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958444
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLM2298812
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-17T19:12:23Z
    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
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7726b2fb2fee919ccb0433f04e7d661769ce0b6b2064107f9672b9ff0fff0a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZGLM2298812.
      date published: 2026-07-17T19:12:23Z
    audio: A Porta É Estreita
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 120.073
      additional property: Musical Key
        type: PropertyValue
        value: 0
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.702
      additional property: Energy
        type: PropertyValue
        value: 0.505
      additional property: Speechiness
        type: PropertyValue
        value: 0.037
      additional property: Acousticness
        type: PropertyValue
        value: 0.627
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.312
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.849
      additional property: Loudness (dB)
        type: PropertyValue
        value: -8.248
      additional property: Key Name
        type: PropertyValue
        value: C
      additional property: Mode Name
        type: PropertyValue
        value: Major