Ivan Carvalho
type: MusicGroup
popularity: 6
followers: 77
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x16d2fcf9cf3663aa4c0ed9d7c888d9f98d9ab578a09a272cc57f1171d2881a15
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954130
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954130
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7c737553-ba66-4f93-8172-ded40426ec21.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7c737553-ba66-4f93-8172-ded40426ec21.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/7c737553-ba66-4f93-8172-ded40426ec21
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T19:07:14Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x16d2fcf9cf3663aa4c0ed9d7c888d9f98d9ab578a09a272cc57f1171d2881a15","name":"Ivan Carvalho","registered_at":"2026-06-17T09:03:56Z","symbol":"NIM1346802","token_address":"0xcbf92e8e3080ac8a6c7680d3f2000e865a2c27dd","type":"artist","uuid":"7c737553-ba66-4f93-8172-ded40426ec21"}
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 0x16d2fcf9cf3663aa4c0ed9d7c888d9f98d9ab578a09a272cc57f1171d2881a15. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7c737553-ba66-4f93-8172-ded40426ec21.json and https://artists.proofprofile.net/proofs/artist/7c737553-ba66-4f93-8172-ded40426ec21.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T19:07:14Z
  text: {"copyright_id":"0x16d2fcf9cf3663aa4c0ed9d7c888d9f98d9ab578a09a272cc57f1171d2881a15","name":"Ivan Carvalho","registered_at":"2026-06-17T09:03:56Z","symbol":"NIM1346802","token_address":"0xcbf92e8e3080ac8a6c7680d3f2000e865a2c27dd","type":"artist","uuid":"7c737553-ba66-4f93-8172-ded40426ec21"}
album: Classicos do Pop Rock (Cover)
  type: MusicAlbum
  date published: 2022-03-24
  track: Tempo Perdido - Cover
    type: MusicRecording
    duration: PT3M52S
    duration ms: 232011
    explicit: false
    by artist: Ivan Carvalho
    in album: Classicos do Pop Rock (Cover)
      type: MusicAlbum
      date published: 2022-03-24
    isrc code: QZGLS2248550
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-06T05:26:45+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x8243d70a2f76a1014ea6eb298850ad490807ba2522097925c3f539fb0bb6071f
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956889
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956889
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLS2248550
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-06T06:56:49Z
    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 0x8243d70a2f76a1014ea6eb298850ad490807ba2522097925c3f539fb0bb6071f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZGLS2248550.
      date published: 2026-07-06T06:56:49Z
    audio: Tempo Perdido - Cover
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 92.038
      additional property: Musical Key
        type: PropertyValue
        value: 4
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.631
      additional property: Energy
        type: PropertyValue
        value: 0.8
      additional property: Speechiness
        type: PropertyValue
        value: 0.026
      additional property: Acousticness
        type: PropertyValue
        value: 0.146
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.283
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.595
      additional property: Loudness (dB)
        type: PropertyValue
        value: -5.844
      additional property: Key Name
        type: PropertyValue
        value: E
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: Imensidão do Mar
  type: MusicAlbum
  date published: 2022-11-18
  track: Imensidão do Mar
    type: MusicRecording
    duration: PT3M25S
    duration ms: 205994
    explicit: false
    by artist: Ivan Carvalho
    in album: Imensidão do Mar
      type: MusicAlbum
      date published: 2022-11-18
    isrc code: BKIVI2200003
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-04T19:47:09+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x3fd371899af6ceee79c68aa9ab809ddc696db6ba738c37dc4e07579a17ba7759
    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/BKIVI2200003
    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 0x3fd371899af6ceee79c68aa9ab809ddc696db6ba738c37dc4e07579a17ba7759. 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/BKIVI2200003.
      date published: 2026-07-05T01:12:41Z
    audio: Imensidão do Mar
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 148.115
      additional property: Musical Key
        type: PropertyValue
        value: 4
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.58
      additional property: Energy
        type: PropertyValue
        value: 0.475
      additional property: Speechiness
        type: PropertyValue
        value: 0.027
      additional property: Acousticness
        type: PropertyValue
        value: 0.761
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.103
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.446
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name
album: Conquista de um Amor
album: Acústico
album: Dá pra Ver

Loudness (dB)
type: PropertyValue
value: -7.836

Key Name
type: PropertyValue
value: E

Mode Name
type: PropertyValue
value: Minor

Conquista de um Amor
type: MusicAlbum
date published: 2022-12-16

Acústico
type: MusicAlbum
date published: 2023-10-13

Dá pra Ver
type: MusicAlbum
date published: 2024-04-26