A+
type: MusicGroup
description: A+ may refer to: Education A+ (grade), the highest grade achievable in a grading system based on letters of the alphabet A+ certification, the professional computer technician certification by C
popularity: 12
followers: 306
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x474076e047cc50b29162628d8996155d46d07309e5e4e359f83f58d77df86101
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953741
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953741
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9e15f518-393b-4d87-b802-2ac980c33a9b.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9e15f518-393b-4d87-b802-2ac980c33a9b.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/9e15f518-393b-4d87-b802-2ac980c33a9b
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T04:44:49Z
additional property: OTSCanonicalRecord
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 0x474076e047cc50b29162628d8996155d46d07309e5e4e359f83f58d77df86101. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9e15f518-393b-4d87-b802-2ac980c33a9b.json and https://artists.proofprofile.net/proofs/artist/9e15f518-393b-4d87-b802-2ac980c33a9b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T04:44:49Z
album: Modo Avião (Red Room 1)
  type: MusicAlbum
  date published: 2023-08-11
album: Qc Boys (Red Room 2)
  type: MusicAlbum
  date published: 2023-09-01
album: Mentiro$A
  type: MusicAlbum
  date published: 2023-09-22
album: Nos Acessos (Set do A+ 2)
  type: MusicAlbum
  date published: 2023-10-27
  track: Nos Acessos (Set do A+ 2)
    type: MusicRecording
    duration: PT6M24S
    duration ms: 384651
    explicit: true
    by artist: A+
    in album: Nos Acessos (Set do A+ 2)
      type: MusicAlbum
      date published: 2023-10-27
    isrc code: QZW9K2333701
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-19T15:41:43+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xb7d6df96914c7234897905083bf2734bd95a7e376e893743c361ec25b01344b6
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958749
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958749
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZW9K2333701
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-19T15:48:23Z
    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 0xb7d6df96914c7234897905083bf2734bd95a7e376e893743c361ec25b01344b6. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZW9K2333701.
      date published: 2026-07-19T15:48:23Z
    audio: Nos Acessos (Set do A+ 2)
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 120.02
      additional property: Musical Key
        type: PropertyValue
        value: 11
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.728
      additional property: Energy
        type: PropertyValue
        value: 0.574
      additional property: Speechiness
        type: PropertyValue
        value: 0.062
      additional property: Acousticness
        type: PropertyValue
        value: 0.101
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.126
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.494
      additional property: Loudness (dB)
        type: PropertyValue
        value: -5.767
      additional property: Key Name
        type: PropertyValue
        value: B
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: Colabora
  type: MusicAlbum
  date published: 2023-11-03
album: Me Guia!
  type: MusicAlbum
  date published: 2023-11-10
album: Velho Texas
  type: MusicAlbum
  date published: 2023-12-08
album: Nova Escolha
  type: MusicAlbum
  date published: 2024-11-19