April Varner
type: MusicGroup
genre: vocal jazz
popularity: 8
followers: 785
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x43ac62f615b9f6a34f79def7bb8bbb4270b26f07fd46cfb54e53bf50c46730bc
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954066
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954066
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/61fcc8f3-a2e0-4f89-a6cf-f1b49a808e36.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/61fcc8f3-a2e0-4f89-a6cf-f1b49a808e36.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/61fcc8f3-a2e0-4f89-a6cf-f1b49a808e36
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x43ac62f615b9f6a34f79def7bb8bbb4270b26f07fd46cfb54e53bf50c46730bc","name":"April Varner","registered_at":"2026-06-17T00:09:25Z","symbol":"NIM1219305","token_address":"0x3cc0c23c9b34d4596d7ab2816d911b4af144b831","type":"artist","uuid":"61fcc8f3-a2e0-4f89-a6cf-f1b49a808e36"}
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 0x43ac62f615b9f6a34f79def7bb8bbb4270b26f07fd46cfb54e53bf50c46730bc. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/61fcc8f3-a2e0-4f89-a6cf-f1b49a808e36.json and https://artists.proofprofile.net/proofs/artist/61fcc8f3-a2e0-4f89-a6cf-f1b49a808e36.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0x43ac62f615b9f6a34f79def7bb8bbb4270b26f07fd46cfb54e53bf50c46730bc","name":"April Varner","registered_at":"2026-06-17T00:09:25Z","symbol":"NIM1219305","token_address":"0x3cc0c23c9b34d4596d7ab2816d911b4af144b831","type":"artist","uuid":"61fcc8f3-a2e0-4f89-a6cf-f1b49a808e36"}
album: Hummingbird
  type: MusicAlbum
  date published: 2022-08-18
album: I'll Remember April
  type: MusicAlbum
  date published: 2024-04-19
album: Dear April
  type: MusicAlbum
  date published: 2024-05-24
album: April
  type: MusicAlbum
  date published: 2024-06-28
  track: April Blues
    type: MusicRecording
    duration: PT4M40S
    duration ms: 280440
    explicit: false
    by artist: April Varner
    in album: April
      type: MusicAlbum
      date published: 2024-06-28
    genre: vocal jazz
    isrc code: QM4TX2494929
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-21T14:14:54+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x80bf796a6d42853d12a476c95d2eb98db7a3009a0e58f2b2c6a7746dc08dda40
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 959023
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/959023
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TX2494929
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-21T15:22:58Z
    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 0x80bf796a6d42853d12a476c95d2eb98db7a3009a0e58f2b2c6a7746dc08dda40. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QM4TX2494929 — a six-check JSON result.
      date published: 2026-07-21T15:22:58Z
    audio: April Blues
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 65.179
      additional property: Musical Key
        type: PropertyValue
        value: 8
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.584
      additional property: Energy
        type: PropertyValue
        value: 0.018
      additional property: Speechiness
        type: PropertyValue
        value: 0.069
      additional property: Acousticness
        type: PropertyValue
        value: 0.917
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.008
      additional property: Liveness
        type: PropertyValue
        value: 0.206
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.185
      additional property: Loudness (dB)
        type: PropertyValue
        value: -19.318
      additional property: Key Name
        type: PropertyValue
        value: Ab
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: White Christmas
  type: MusicAlbum
  date published: 2024-11-08
album: Winter Songs, Vol. 1
  type: MusicAlbum
  date published: 2024-11-29
album: Winter Blues
  type: MusicAlbum
  date published: 2025-01-17
album: April Love
  type: MusicAlbum
  date published: 2025-02-14
  track: April Love
    type: MusicRecording
    duration: PT2M54S
    duration ms: 174053
    explicit: false
    by artist: April Varner
    in album: April Love
      type: MusicAlbum
      date published: 2025-02-14
    genre: vocal jazz
    isrc code: USCGJ2505122
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-18T16:11:07+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x0cbdd2252f28c5f13cd2c7a91eaab8c5441a136b2f10628122ae27d106b779c3
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958576
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958576
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ2505122
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-18T16:22:28Z
    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 0x0cbdd2252f28c5f13cd2c7a91eaab8c5441a136b2f10628122ae27d106b779c3. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/USCGJ2505122 — a six-check JSON result.
      date published: 2026-07-18T16:22:28Z
    audio: April Love
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 95.569
      additional property: Musical Key
        type: PropertyValue
        value: 7
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 3
      additional property: Danceability
      additional property: Energy
      additional property: Speechiness
      additional property: Acousticness
      additional property: Instrumentalness
      additional property: Liveness
      additional property: Valence (Positivity)
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name
album: Jingle Bells

Danceability
type: PropertyValue
value: 0.567

Energy
type: PropertyValue
value: 0.257

Speechiness
type: PropertyValue
value: 0.046

Acousticness
type: PropertyValue
value: 0.8

Instrumentalness
type: PropertyValue
value: 0

Liveness
type: PropertyValue
value: 0.161

Valence (Positivity)
type: PropertyValue
value: 0.517

Loudness (dB)
type: PropertyValue
value: -13.342

Key Name
type: PropertyValue
value: G

Mode Name
type: PropertyValue
value: Major

Jingle Bells
type: MusicAlbum
date published: 2025-10-31