Jasper Sheff
type: MusicGroup
popularity: 15
followers: 76
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x84fb2aea7374d1aed43109adfc8ea85b0cda5ee4d9e555a0a899dbf660971252
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953742
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953742
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/841ac820-4035-4153-bd0f-a7763c32edd7.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/841ac820-4035-4153-bd0f-a7763c32edd7.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/841ac820-4035-4153-bd0f-a7763c32edd7
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T04:47:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x84fb2aea7374d1aed43109adfc8ea85b0cda5ee4d9e555a0a899dbf660971252","name":"Jasper Sheff","registered_at":"2026-06-14T18:21:55Z","symbol":"NIM0537330","token_address":"0xac1ac9a5fb4cc927f2c30a2370d5434eecfb464d","type":"artist","uuid":"841ac820-4035-4153-bd0f-a7763c32edd7"}
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 0x84fb2aea7374d1aed43109adfc8ea85b0cda5ee4d9e555a0a899dbf660971252. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/841ac820-4035-4153-bd0f-a7763c32edd7.json and https://artists.proofprofile.net/proofs/artist/841ac820-4035-4153-bd0f-a7763c32edd7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T04:47:56Z
  text: {"copyright_id":"0x84fb2aea7374d1aed43109adfc8ea85b0cda5ee4d9e555a0a899dbf660971252","name":"Jasper Sheff","registered_at":"2026-06-14T18:21:55Z","symbol":"NIM0537330","token_address":"0xac1ac9a5fb4cc927f2c30a2370d5434eecfb464d","type":"artist","uuid":"841ac820-4035-4153-bd0f-a7763c32edd7"}
album: 10 08
  type: MusicAlbum
  date published: 2024-10-10
album: 10 27
  type: MusicAlbum
  date published: 2024-10-27
album: 06 22
  type: MusicAlbum
  date published: 2024-11-18
album: Husk (Demo)
  type: MusicAlbum
  date published: 2024-11-21
album: 12 12
  type: MusicAlbum
  date published: 2024-12-12
album: 22° Halo
  type: MusicAlbum
  date published: 2024-12-22
  track: 22° Halo
    type: MusicRecording
    duration: PT2M18S
    duration ms: 138000
    explicit: false
    by artist: Jasper Sheff
    in album: 22° Halo
      type: MusicAlbum
      date published: 2024-12-22
    isrc code: TCAJC2496625
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-15T17:48:58+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xd912651116936282cd73d676a2d7871ea4670a05b5fe1b6ad7897012255536f9
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958180
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958180
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAJC2496625
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-15T17:59:52Z
    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 0xd912651116936282cd73d676a2d7871ea4670a05b5fe1b6ad7897012255536f9. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/TCAJC2496625.
      date published: 2026-07-15T17:59:52Z
    audio: 22° Halo
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 159.637
      additional property: Musical Key
        type: PropertyValue
        value: 2
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.648
      additional property: Energy
        type: PropertyValue
        value: 0.474
      additional property: Speechiness
        type: PropertyValue
        value: 0.296
      additional property: Acousticness
        type: PropertyValue
        value: 0.65
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.836
      additional property: Liveness
        type: PropertyValue
        value: 0.117
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.478
      additional property: Loudness (dB)
        type: PropertyValue
        value: -11.394
      additional property: Key Name
        type: PropertyValue
        value: D
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Hush Voice Memo
  type: MusicAlbum
  date published: 2025-04-06
album: Toy (Demo)
  type: MusicAlbum
  date published: 2025-08-05
  track: Toy - Demo
    type: MusicRecording
    duration: PT2M16S
    duration ms: 136000
    explicit: false
    by artist: Jasper Sheff
    in album: Toy (Demo)
      type: MusicAlbum
      date published: 2025-08-05
    isrc code: TCAJY2518708
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-16T13:02:39+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x842abbaf81738f1be7dbd62a2ed879e025768580a8ba45d50e9fc387d253daee
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958300
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958300
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAJY2518708
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-16T16:14:30Z
    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 0x842abbaf81738f1be7dbd62a2ed879e025768580a8ba45d50e9fc387d253daee. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAJY2518708.
      date published: 2026-07-16T16:14:30Z
    audio: Toy - Demo
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 119.908
      additional property: Musical Key
        type: PropertyValue
        value: 4
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.512
      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: 10 21 (Demo)

Energy
type: PropertyValue
value: 0.662

Speechiness
type: PropertyValue
value: 0.032

Acousticness
type: PropertyValue
value: 0.685

Instrumentalness
type: PropertyValue
value: 0.308

Liveness
type: PropertyValue
value: 0.073

Valence (Positivity)
type: PropertyValue
value: 0.181

Loudness (dB)
type: PropertyValue
value: -5.395

Key Name
type: PropertyValue
value: E

Mode Name
type: PropertyValue
value: Minor

10 21 (Demo)
type: MusicAlbum
date published: 2025-10-21

06 22
type: MusicAlbum
date published: 2025-10-29