Leonardo Alexandre
type: MusicGroup
popularity: 3
followers: 50
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x307a20b48cc44bc83a63928da9ac88adcfa95242cd8389ba630ca2ee04ab21ec
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954705
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954705
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ec3ce27a-07e7-4a3d-ac38-0085319a1e92.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ec3ce27a-07e7-4a3d-ac38-0085319a1e92.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/ec3ce27a-07e7-4a3d-ac38-0085319a1e92
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T13:42:37Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x307a20b48cc44bc83a63928da9ac88adcfa95242cd8389ba630ca2ee04ab21ec","name":"Leonardo Alexandre","registered_at":"2026-06-21T11:18:21Z","symbol":"NIM1908567","token_address":"0x49b06fe1c79d53fc26bcf97850d94d47214d72b3","type":"artist","uuid":"ec3ce27a-07e7-4a3d-ac38-0085319a1e92"}
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 0x307a20b48cc44bc83a63928da9ac88adcfa95242cd8389ba630ca2ee04ab21ec. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ec3ce27a-07e7-4a3d-ac38-0085319a1e92.json and https://artists.proofprofile.net/proofs/artist/ec3ce27a-07e7-4a3d-ac38-0085319a1e92.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-21T13:42:37Z
  text: {"copyright_id":"0x307a20b48cc44bc83a63928da9ac88adcfa95242cd8389ba630ca2ee04ab21ec","name":"Leonardo Alexandre","registered_at":"2026-06-21T11:18:21Z","symbol":"NIM1908567","token_address":"0x49b06fe1c79d53fc26bcf97850d94d47214d72b3","type":"artist","uuid":"ec3ce27a-07e7-4a3d-ac38-0085319a1e92"}
album: Cansado De O Perseguir
  type: MusicAlbum
  date published: 2024-12-21
  track: Cansado De O Perseguir
    type: MusicRecording
    duration: PT3M38S
    duration ms: 218352
    explicit: false
    by artist: Leonardo Alexandre
    in album: Cansado De O Perseguir
      type: MusicAlbum
      date published: 2024-12-21
    isrc code: SGW502252129
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-17T06:30:48+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xbd17f07e05bbe8557cbb5dd147f02835c78dfdcd79f865c98664c5c4fd66c7cb
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958377
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958377
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SGW502252129
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-17T06:48:00Z
    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 0xbd17f07e05bbe8557cbb5dd147f02835c78dfdcd79f865c98664c5c4fd66c7cb. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/SGW502252129 — a six-check JSON result.
      date published: 2026-07-17T06:48:00Z
    audio: Cansado De O Perseguir
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 175.94
      additional property: Musical Key
        type: PropertyValue
        value: 9
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.68
      additional property: Energy
        type: PropertyValue
        value: 0.759
      additional property: Speechiness
        type: PropertyValue
        value: 0.118
      additional property: Acousticness
        type: PropertyValue
        value: 0.117
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.799
      additional property: Liveness
        type: PropertyValue
        value: 0.115
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.942
      additional property: Loudness (dB)
        type: PropertyValue
        value: -7.041
      additional property: Key Name
        type: PropertyValue
        value: A
      additional property: Mode Name
        type: PropertyValue
        value: Minor