Frédéric Leissen
type: MusicGroup
popularity: 6
followers: 118
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x0d73ec115f2fd1e87c3c5e0005ad85cefbf057a3d6c5a25d3ae494fe9ea919c3
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954017
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954017
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/371a1012-10e6-4e4e-ac23-3c360be96788.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/371a1012-10e6-4e4e-ac23-3c360be96788.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/371a1012-10e6-4e4e-ac23-3c360be96788
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T23:38:33Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x0d73ec115f2fd1e87c3c5e0005ad85cefbf057a3d6c5a25d3ae494fe9ea919c3","name":"Frédéric Leissen","registered_at":"2026-06-16T08:44:29Z","symbol":"NIM0998634","token_address":"0xf29ec95791ecc397b6427e0fc136bc42a8c2e5af","type":"artist","uuid":"371a1012-10e6-4e4e-ac23-3c360be96788"}
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d73ec115f2fd1e87c3c5e0005ad85cefbf057a3d6c5a25d3ae494fe9ea919c3. 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/371a1012-10e6-4e4e-ac23-3c360be96788.json and https://artists.proofprofile.net/proofs/artist/371a1012-10e6-4e4e-ac23-3c360be96788.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0x0d73ec115f2fd1e87c3c5e0005ad85cefbf057a3d6c5a25d3ae494fe9ea919c3","name":"Frédéric Leissen","registered_at":"2026-06-16T08:44:29Z","symbol":"NIM0998634","token_address":"0xf29ec95791ecc397b6427e0fc136bc42a8c2e5af","type":"artist","uuid":"371a1012-10e6-4e4e-ac23-3c360be96788"}
album: The Nightingale
  type: MusicAlbum
  date published: 2020-07-17
  track: The Nightingale
    type: MusicRecording
    duration: PT1M58S
    duration ms: 118184
    explicit: false
    by artist: Frédéric Leissen
    in album: The Nightingale
      type: MusicAlbum
      date published: 2020-07-17
    isrc code: QZAKB2004978
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-12T21:33:43+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x9b5d4ca6a3f31df14d4f8cfbe03d5c13e74c85dc8fadbd7d5538d970940da684
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 957761
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/957761
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZAKB2004978
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-12T21:55:15Z
    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
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5d4ca6a3f31df14d4f8cfbe03d5c13e74c85dc8fadbd7d5538d970940da684. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/QZAKB2004978.
      date published: 2026-07-12T21:55:15Z
    audio: The Nightingale
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 67.382
      additional property: Musical Key
        type: PropertyValue
        value: 7
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 3
      additional property: Danceability
        type: PropertyValue
        value: 0.358
      additional property: Energy
        type: PropertyValue
        value: 0.026
      additional property: Speechiness
        type: PropertyValue
        value: 0.039
      additional property: Acousticness
        type: PropertyValue
        value: 0.994
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.922
      additional property: Liveness
        type: PropertyValue
        value: 0.107
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.143
      additional property: Loudness (dB)
        type: PropertyValue
        value: -24.675
      additional property: Key Name
        type: PropertyValue
        value: G
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: written in the sky
  type: MusicAlbum
  date published: 2021-04-12
album: Seaboard Lane
  type: MusicAlbum
  date published: 2022-02-13