Silvestre Fonseca
type: MusicGroup
genre: fado
popularity: 4
followers: 266
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xce26960ad9e2a492dd991a38c6346a1ce6421112d506db1a862bb2f2bde292d6
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953907
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953907
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1655d318-4fad-43cc-be2d-b3cf33229f8b.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1655d318-4fad-43cc-be2d-b3cf33229f8b.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/1655d318-4fad-43cc-be2d-b3cf33229f8b
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T07:39:24Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xce26960ad9e2a492dd991a38c6346a1ce6421112d506db1a862bb2f2bde292d6","name":"Silvestre Fonseca","registered_at":"2026-06-15T21:22:16Z","symbol":"NIM0835722","token_address":"0xd411eb3fb160bd048ee80975bfd8fa432e90f6ce","type":"artist","uuid":"1655d318-4fad-43cc-be2d-b3cf33229f8b"}
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 0xce26960ad9e2a492dd991a38c6346a1ce6421112d506db1a862bb2f2bde292d6. Chain 2 (Bitcoin): anchored in block 953907 (2026-06-16T07:39:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1655d318-4fad-43cc-be2d-b3cf33229f8b.json and https://artists.proofprofile.net/proofs/artist/1655d318-4fad-43cc-be2d-b3cf33229f8b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T07:39:24Z
  text: {"copyright_id":"0xce26960ad9e2a492dd991a38c6346a1ce6421112d506db1a862bb2f2bde292d6","name":"Silvestre Fonseca","registered_at":"2026-06-15T21:22:16Z","symbol":"NIM0835722","token_address":"0xd411eb3fb160bd048ee80975bfd8fa432e90f6ce","type":"artist","uuid":"1655d318-4fad-43cc-be2d-b3cf33229f8b"}
album: Guitarra Clássica com Orquestra
  type: MusicAlbum
  date published: 1987
album: Guitarra Clássica 1990
  type: MusicAlbum
  date published: 1990
album: Guitarra Clássica
  type: MusicAlbum
  date published: 1999
album: Dedo D' Alma
  type: MusicAlbum
  date published: 2002
album: Música ao Jantar
  type: MusicAlbum
  date published: 2011-11-02
album: Boleros
  type: MusicAlbum
  date published: 2016
album: Memórias
  type: MusicAlbum
  date published: 2016-05-18
album: Dolce Barroco
  type: MusicAlbum
  date published: 2016-05-18
album: Olhares
  type: MusicAlbum
  date published: 2016-05-19
album: Fados e Mornas
  type: MusicAlbum
  date published: 2019-04-12
album: Opiniao
  type: MusicAlbum
  date published: 2024-03-12
track: La Barca
  type: MusicRecording
  duration: PT3M14S
  duration ms: 194933
  explicit: false
  by artist: António Vasco Moraes
  by artist: Silvestre Fonseca
  in album: Silêncio
    type: MusicAlbum
    date published: 2016-10-12
  isrc code: QZ8251923986
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-08-01T00:10:49+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xb11bde582c9646c84297c5609955753653c23d53ca2faf3e0418364d0e29056c
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 960489
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/960489
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ8251923986
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-08-01T00:40:43Z
  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 0xb11bde582c9646c84297c5609955753653c23d53ca2faf3e0418364d0e29056c. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QZ8251923986.
    date published: 2026-08-01T00:40:43Z
  audio: La Barca
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 120.521
    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: 0.764
    additional property: Energy
      type: PropertyValue
      value: 0.264
    additional property: Speechiness
      type: PropertyValue
      value: 0.051
    additional property: Acousticness
      type: PropertyValue
      value: 0.845
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.118
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.514
    additional property: Loudness (dB)
      type: PropertyValue
      value: -14.79
    additional property: Key Name
      type: PropertyValue
      value: D
    additional property: Mode Name
      type: PropertyValue
      value: Major