Sjoerd Ensa
type: MusicGroup
popularity: 4
followers: 361
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xdf390bc6b5cc20b1e6e3bd9974d0a4e9b8cd66f3d115fa5c264a11649427a005
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954130
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954130
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7c178b20-dce7-45c5-b829-beb9417ff92a.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7c178b20-dce7-45c5-b829-beb9417ff92a.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/7c178b20-dce7-45c5-b829-beb9417ff92a
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T19:07:14Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xdf390bc6b5cc20b1e6e3bd9974d0a4e9b8cd66f3d115fa5c264a11649427a005","name":"Sjoerd Ensa","registered_at":"2026-06-17T08:51:24Z","symbol":"NIM1343822","token_address":"0x6e13676fe31de7b3eae530b950223590fce67266","type":"artist","uuid":"7c178b20-dce7-45c5-b829-beb9417ff92a"}
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 0xdf390bc6b5cc20b1e6e3bd9974d0a4e9b8cd66f3d115fa5c264a11649427a005. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7c178b20-dce7-45c5-b829-beb9417ff92a.json and https://artists.proofprofile.net/proofs/artist/7c178b20-dce7-45c5-b829-beb9417ff92a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T19:07:14Z
  text: {"copyright_id":"0xdf390bc6b5cc20b1e6e3bd9974d0a4e9b8cd66f3d115fa5c264a11649427a005","name":"Sjoerd Ensa","registered_at":"2026-06-17T08:51:24Z","symbol":"NIM1343822","token_address":"0x6e13676fe31de7b3eae530b950223590fce67266","type":"artist","uuid":"7c178b20-dce7-45c5-b829-beb9417ff92a"}
album: De weagen fan`e tiid
  type: MusicAlbum
  date published: 2019-12-05
album: De weagen fan'e tiid
  type: MusicAlbum
  date published: 2019-12-05
album: Ensa
  type: MusicAlbum
  date published: 2023-08-12
album: Praat mar Frysk
  type: MusicAlbum
  date published: 2024-02-22
album: Hy wier ien Fries
  type: MusicAlbum
  date published: 2024-09-04
album: Brek de muorre
  type: MusicAlbum
  date published: 2025-04-04
  track: Brek de muorre
    type: MusicRecording
    duration: PT4M6S
    duration ms: 246622
    explicit: true
    by artist: Sjoerd Ensa
    in album: Brek de muorre
      type: MusicAlbum
      date published: 2025-04-04
    isrc code: NL5MF2103979
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-22T05:17:36+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x4a0f732db8e445ed8c80796b9b3dda60d412ef6f14534ef83db8a89179dc7537
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 959103
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/959103
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NL5MF2103979
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-22T05:56:21Z
    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 0x4a0f732db8e445ed8c80796b9b3dda60d412ef6f14534ef83db8a89179dc7537. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/NL5MF2103979.
      date published: 2026-07-22T05:56:21Z
    audio: Brek de muorre
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 153.85
      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: 0.445
      additional property: Energy
        type: PropertyValue
        value: 0.432
      additional property: Speechiness
        type: PropertyValue
        value: 0.031
      additional property: Acousticness
        type: PropertyValue
        value: 0.418
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.163
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.494
      additional property: Loudness (dB)
        type: PropertyValue
        value: -9.007
      additional property: Key Name
        type: PropertyValue
        value: D
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Skimerwrâld
  type: MusicAlbum
  date published: 2025-11-11