Ermelinda Duarte
type: MusicGroup
genre: fado
popularity: 6
followers: 245
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x87cd4e00b8f59c1a4316831d0ddd06b3bacee7d28c3ef481a019e80606c249ff
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953882
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953882
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/0a8ae580-2e35-42f7-8539-bc7f998fb60e.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/0a8ae580-2e35-42f7-8539-bc7f998fb60e.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/0a8ae580-2e35-42f7-8539-bc7f998fb60e
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T03:13:34Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x87cd4e00b8f59c1a4316831d0ddd06b3bacee7d28c3ef481a019e80606c249ff","name":"Ermelinda Duarte","registered_at":"2026-06-15T17:11:06Z","symbol":"NIM0775818","token_address":"0x5cc1b1fb58ce5844df623c507b60ba37afe1875a","type":"artist","uuid":"0a8ae580-2e35-42f7-8539-bc7f998fb60e"}
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 0x87cd4e00b8f59c1a4316831d0ddd06b3bacee7d28c3ef481a019e80606c249ff. Chain 2 (Bitcoin): anchored in block 953882 (2026-06-16T03:13:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0a8ae580-2e35-42f7-8539-bc7f998fb60e.json and https://artists.proofprofile.net/proofs/artist/0a8ae580-2e35-42f7-8539-bc7f998fb60e.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-16T03:13:34Z
  text: {"copyright_id":"0x87cd4e00b8f59c1a4316831d0ddd06b3bacee7d28c3ef481a019e80606c249ff","name":"Ermelinda Duarte","registered_at":"2026-06-15T17:11:06Z","symbol":"NIM0775818","token_address":"0x5cc1b1fb58ce5844df623c507b60ba37afe1875a","type":"artist","uuid":"0a8ae580-2e35-42f7-8539-bc7f998fb60e"}
album: Somos Livres
  type: MusicAlbum
  date published: 1975-01-01
  track: Somos livres
    type: MusicRecording
    duration: PT4M6S
    duration ms: 246253
    explicit: false
    by artist: Ermelinda Duarte
    in album: Somos Livres
      type: MusicAlbum
      date published: 1975-01-01
    genre: fado
    isrc code: PTVC17500140
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-06-25T16:45:20+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x1b8832b9a09b57e15c403303f8bf29f90e55202ebce998b3b7716c814a32a068
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956402
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956402
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PTVC17500140
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-02T22:05:07Z
    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 0x1b8832b9a09b57e15c403303f8bf29f90e55202ebce998b3b7716c814a32a068. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PTVC17500140 — a six-check JSON result.
      date published: 2026-07-02T22:05:07Z
    audio: Somos livres
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 177.742
      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: 0.304
      additional property: Energy
        type: PropertyValue
        value: 0.472
      additional property: Speechiness
        type: PropertyValue
        value: 0.033
      additional property: Acousticness
        type: PropertyValue
        value: 0.019
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.152
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.611
      additional property: Loudness (dB)
        type: PropertyValue
        value: -10.208
      additional property: Key Name
        type: PropertyValue
        value: D
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Somos Livres
  type: MusicAlbum
  date published: 1975-01-01
album: Nossas Armas São as Mãos
  type: MusicAlbum
  date published: 1977-01-01
album: Cantar Lisboa
  type: MusicAlbum
  date published: 1982
album: Jovem, Jovem!
  type: MusicAlbum
  date published: 1989
track: Somos livres
  type: MusicRecording
  duration: PT4M6S
  duration ms: 246253
  explicit: false
  by artist: Ermelinda Duarte
  in album: Aromas de Abril
    type: MusicAlbum
    date published: 2008-05-05
  isrc code: PTVC17500140
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-06-25T16:45:20+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x1b8832b9a09b57e15c403303f8bf29f90e55202ebce998b3b7716c814a32a068
  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/PTVC17500140
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-02T03:55:08Z
  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 0x1b8832b9a09b57e15c403303f8bf29f90e55202ebce998b3b7716c814a32a068. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PTVC17500140 — a six-check JSON result.
    date published: 2026-07-02T03:55:08Z
  audio: Somos livres
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 170.865
    additional property: Musical Key
      type: PropertyValue
      value: 2
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.304
    additional property: Energy
      type: PropertyValue
      value: 0.472
    additional property: Speechiness
      type: PropertyValue
      value: 0.033
    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

Acousticness
type: PropertyValue
value: 0.019

Instrumentalness
type: PropertyValue
value: 0

Liveness
type: PropertyValue
value: 0.152

Valence (Positivity)
type: PropertyValue
value: 0.611

Loudness (dB)
type: PropertyValue
value: -14.038

Key Name
type: PropertyValue
value: D

Mode Name
type: PropertyValue
value: Major