Sigrun Stephan
type: MusicGroup
popularity: 3
followers: 21
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xa10301d72bf2f7524aacf5c6f33f601546075641a7b98336feb6056ecfbb3ce2
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954784
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954784
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e8047cbf-f334-4316-9c8c-0f81993e1405.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e8047cbf-f334-4316-9c8c-0f81993e1405.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/e8047cbf-f334-4316-9c8c-0f81993e1405
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-22T02:53:59Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xa10301d72bf2f7524aacf5c6f33f601546075641a7b98336feb6056ecfbb3ce2","name":"Sigrun Stephan","registered_at":"2026-06-21T09:42:17Z","symbol":"NIM1891314","token_address":"0x3099a01151c1cef5d1445e647b18e41fd911f7ee","type":"artist","uuid":"e8047cbf-f334-4316-9c8c-0f81993e1405"}
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 0xa10301d72bf2f7524aacf5c6f33f601546075641a7b98336feb6056ecfbb3ce2. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e8047cbf-f334-4316-9c8c-0f81993e1405.json and https://artists.proofprofile.net/proofs/artist/e8047cbf-f334-4316-9c8c-0f81993e1405.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-22T02:53:59Z
  text: {"copyright_id":"0xa10301d72bf2f7524aacf5c6f33f601546075641a7b98336feb6056ecfbb3ce2","name":"Sigrun Stephan","registered_at":"2026-06-21T09:42:17Z","symbol":"NIM1891314","token_address":"0x3099a01151c1cef5d1445e647b18e41fd911f7ee","type":"artist","uuid":"e8047cbf-f334-4316-9c8c-0f81993e1405"}
album: Clavichord
  type: MusicAlbum
  date published: 2014-06-10
album: Kinship
  type: MusicAlbum
  date published: 2017-09-08
  track: Capriccio in B-Flat Major, BWV 992: VI. Fuga all'imitazione della cornetta di postiglione
    type: MusicRecording
    duration: PT2M30S
    duration ms: 150218
    explicit: false
    by artist: Sigrun Stephan
    in album: Kinship
      type: MusicAlbum
      date published: 2017-09-08
    isrc code: NLB151700323
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-06T22:08:23+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xf3314fa5ebd6e98161ac9ef973767195d4d18bb74373101402d0589ae63422d9
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 957118
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/957118
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLB151700323
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-08T03:20:19Z
    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 0xf3314fa5ebd6e98161ac9ef973767195d4d18bb74373101402d0589ae63422d9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NLB151700323.
      date published: 2026-07-08T03:20:19Z
    audio: Capriccio in B-Flat Major, BWV 992: VI. Fuga all'imitazione della cornetta di postiglione
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 120.285
      additional property: Musical Key
        type: PropertyValue
        value: 9
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 5
      additional property: Danceability
        type: PropertyValue
        value: 0.461
      additional property: Energy
        type: PropertyValue
        value: 0.507
      additional property: Speechiness
        type: PropertyValue
        value: 0.034
      additional property: Acousticness
        type: PropertyValue
        value: 0.804
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.069
      additional property: Liveness
        type: PropertyValue
        value: 0.071
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.975
      additional property: Loudness (dB)
        type: PropertyValue
        value: -21.931
      additional property: Key Name
        type: PropertyValue
        value: A
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Music for Cembalino
  type: MusicAlbum
  date published: 2018-10-12
album: Cembalo
  type: MusicAlbum
  date published: 2021-07-03