Leander Sá
type: MusicGroup
popularity: 4
followers: 201
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x06eba8abb108672be054210a5e0877880f6ab3092cd44044949499b75f442a7b
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954573
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954573
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b4e3af14-ca4b-4223-aa5c-e1caeba50eeb.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b4e3af14-ca4b-4223-aa5c-e1caeba50eeb.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/b4e3af14-ca4b-4223-aa5c-e1caeba50eeb
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T15:45:29Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x06eba8abb108672be054210a5e0877880f6ab3092cd44044949499b75f442a7b","name":"Leander Sá","registered_at":"2026-06-20T14:23:05Z","symbol":"NIM1630812","token_address":"0x8575ade1920a281e1ed420b34e4c9607f605c9f1","type":"artist","uuid":"b4e3af14-ca4b-4223-aa5c-e1caeba50eeb"}
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 0x06eba8abb108672be054210a5e0877880f6ab3092cd44044949499b75f442a7b. Chain 2 (Bitcoin): anchored in block 954573 (2026-06-20T15:45:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b4e3af14-ca4b-4223-aa5c-e1caeba50eeb.json and https://artists.proofprofile.net/proofs/artist/b4e3af14-ca4b-4223-aa5c-e1caeba50eeb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T15:45:29Z
  text: {"copyright_id":"0x06eba8abb108672be054210a5e0877880f6ab3092cd44044949499b75f442a7b","name":"Leander Sá","registered_at":"2026-06-20T14:23:05Z","symbol":"NIM1630812","token_address":"0x8575ade1920a281e1ed420b34e4c9607f605c9f1","type":"artist","uuid":"b4e3af14-ca4b-4223-aa5c-e1caeba50eeb"}
album: Inconsciente
  type: MusicAlbum
  date published: 2019-01-10
album: Casalzão de Respeito
  type: MusicAlbum
  date published: 2019-08-02
album: Término Recente
  type: MusicAlbum
  date published: 2021-05-05
album: Pra Bber Uma (Acústico)
  type: MusicAlbum
  date published: 2021-07-08
album: Não Te Recomendo
  type: MusicAlbum
  date published: 2024-07-11
  track: Não Te Recomendo
    type: MusicRecording
    duration: PT2M31S
    duration ms: 151303
    explicit: false
    by artist: Leander Sá
    in album: Não Te Recomendo
      type: MusicAlbum
      date published: 2024-07-11
    isrc code: QZNJX2493055
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-18T13:01:02+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xfa4a081c1bea1a895f9373f2feaf98cf6e8e00085373a7c75d6521e10a3c977c
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958552
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958552
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJX2493055
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-18T13:15:29Z
    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 0xfa4a081c1bea1a895f9373f2feaf98cf6e8e00085373a7c75d6521e10a3c977c. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZNJX2493055.
      date published: 2026-07-18T13:15:29Z
    audio: Não Te Recomendo
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 75.984
      additional property: Musical Key
        type: PropertyValue
        value: 10
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.517
      additional property: Energy
        type: PropertyValue
        value: 0.781
      additional property: Speechiness
        type: PropertyValue
        value: 0.146
      additional property: Acousticness
        type: PropertyValue
        value: 0.56
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.128
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.734
      additional property: Loudness (dB)
        type: PropertyValue
        value: -3.833
      additional property: Key Name
        type: PropertyValue
        value: Bb
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Língua de Sempre
  type: MusicAlbum
  date published: 2025-07-24