A2
type: MusicGroup
genre: j-rap
description: A2, A02, A002, A², A.II or A-2 may refer to: Biology and medicine British NVC community A2 (Lemna minor community), a plant community A2, the second anal vein in the Comstock-Needham system of inse
popularity: 11
followers: 402
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x94a6a0c3a2454118b9ec0e8ce73bee57fab4607268cfe920b91ff13d69704785
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953645
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953645
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/40ef8bbe-41b1-4f1c-9f33-5f74e3e958c4.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/40ef8bbe-41b1-4f1c-9f33-5f74e3e958c4.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/40ef8bbe-41b1-4f1c-9f33-5f74e3e958c4
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T14:31:42Z
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 0x94a6a0c3a2454118b9ec0e8ce73bee57fab4607268cfe920b91ff13d69704785. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/40ef8bbe-41b1-4f1c-9f33-5f74e3e958c4.json and https://artists.proofprofile.net/proofs/artist/40ef8bbe-41b1-4f1c-9f33-5f74e3e958c4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T14:31:42Z
album: Fala Pra Mim
  type: MusicAlbum
  date published: 2017-07-23
album: I'm Ready
  type: MusicAlbum
  date published: 2020-05-30
album: I'm Ready
  type: MusicAlbum
  date published: 2020-05-30
album: Last Day.
  type: MusicAlbum
  date published: 2020-08-31
album: Last Day.
  type: MusicAlbum
  date published: 2020-08-31
album: Envy
  type: MusicAlbum
  date published: 2020-10-17
album: Envy
  type: MusicAlbum
  date published: 2020-10-17
album: 2faced
  type: MusicAlbum
  date published: 2020-12-12
album: 2faced
  type: MusicAlbum
  date published: 2020-12-12
album: COME BACK
  type: MusicAlbum
  date published: 2021-03-01
album: COME BACK
  type: MusicAlbum
  date published: 2021-03-01
album: Dreamin'
  type: MusicAlbum
  date published: 2021-04-10
album: Dreamin'
  type: MusicAlbum
  date published: 2021-04-10
album: Sun Sun Sunny
  type: MusicAlbum
  date published: 2021-07-22
album: Sun Sun Sunny
  type: MusicAlbum
  date published: 2021-07-22
album: CALL MY NAME
  type: MusicAlbum
  date published: 2021-08-07
album: CALL MY NAME
  type: MusicAlbum
  date published: 2021-08-07
album: EXPLOSION OF ARTS
  type: MusicAlbum
  date published: 2022-03-05
  track: We Swear
    type: MusicRecording
    duration: PT3M47S
    duration ms: 227184
    explicit: true
    by artist: A2
    in album: EXPLOSION OF ARTS
      type: MusicAlbum
      date published: 2022-03-05
    genre: j-rap
    isrc code: TCJPR2215574
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-19T15:06:56+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x08c85149f6a1f68ba5aa5c0ab5c61a8fc370b6f44b84a317ea98e48740d3670c
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958746
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958746
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPR2215574
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-19T15:36:35Z
    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 0x08c85149f6a1f68ba5aa5c0ab5c61a8fc370b6f44b84a317ea98e48740d3670c. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/TCJPR2215574.
      date published: 2026-07-19T15:36:35Z
    audio: We Swear
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 145.013
      additional property: Musical Key
        type: PropertyValue
        value: 5
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.638
      additional property: Energy
        type: PropertyValue
        value: 0.729
      additional property: Speechiness
        type: PropertyValue
        value: 0.05
      additional property: Acousticness
        type: PropertyValue
        value: 0.515
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.134
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.301
      additional property: Loudness (dB)
        type: PropertyValue
        value: -5.574
      additional property: Key Name
        type: PropertyValue
        value: F
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: EXPLOSION OF ARTS
  type: MusicAlbum
  date published: 2022-03-05
album: WTF BOY
  type: MusicAlbum
  date published: 2022-07-23
album: WTF BOY
  type: MusicAlbum
  date published: 2022-07-23
album: Someday Again
  type: MusicAlbum
  date published: 2022-08-06
album: Someday Again
  type: MusicAlbum
  date published: 2022-08-06
album: KATAOMOI (Remix)
  type: MusicAlbum
  date published: 2022-12-03
album: KATAOMOI (Remix)
  type: MusicAlbum
  date published: 2022-12-03
album: ANOSORANI (Remix)
  type: MusicAlbum
  date published: 2023-02-25
album: あの空に (Remix)
album: Don't Touch Me
album: キミガスキ
album: KIMIGASUKI
album: Ketsurakusha Misery
album: 欠落者Misery
album: All I Need
album: I Miss You
album: Nostalgy
album: All Night
album: Fleeting But Memorable

あの空に (Remix)
type: MusicAlbum
date published: 2023-02-25

Don't Touch Me
type: MusicAlbum
date published: 2023-03-30

キミガスキ
type: MusicAlbum
date published: 2023-05-27

KIMIGASUKI
type: MusicAlbum
date published: 2023-05-27

Ketsurakusha Misery
type: MusicAlbum
date published: 2023-08-07

欠落者Misery
type: MusicAlbum
date published: 2023-08-07

All I Need
type: MusicAlbum
date published: 2023-10-07

All I Need
type: MusicAlbum
date published: 2023-10-07

I Miss You
type: MusicAlbum
date published: 2024-06-29

I Miss You
type: MusicAlbum
date published: 2024-06-29

Nostalgy
type: MusicAlbum
date published: 2024-08-31

Nostalgy
type: MusicAlbum
date published: 2024-08-31

All Night
type: MusicAlbum
date published: 2024-12-04

All Night
type: MusicAlbum
date published: 2024-12-04

Fleeting But Memorable
type: MusicAlbum
date published: 2025-02-03

Fleeting But Memorable
type: MusicAlbum
date published: 2025-02-03