Maria Kruse
type: MusicGroup
popularity: 36
followers: 73
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xa23a60060db4cd0fcd8306c11c29031388ace384e81f3c7d0a6830fadb04f9cf
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953407
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953407
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/fbc1a76a-7835-4995-b4d2-f2441b883b5e.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/fbc1a76a-7835-4995-b4d2-f2441b883b5e.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/fbc1a76a-7835-4995-b4d2-f2441b883b5e
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xa23a60060db4cd0fcd8306c11c29031388ace384e81f3c7d0a6830fadb04f9cf","name":"Maria Kruse","registered_at":"2026-06-12T14:23:11Z","symbol":"NIM0324326","token_address":"0xada136d6f785b1593356c3dbe6568a2b5eee1c42","type":"artist","uuid":"fbc1a76a-7835-4995-b4d2-f2441b883b5e"}
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 0xa23a60060db4cd0fcd8306c11c29031388ace384e81f3c7d0a6830fadb04f9cf. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fbc1a76a-7835-4995-b4d2-f2441b883b5e.json and https://artists.proofprofile.net/proofs/artist/fbc1a76a-7835-4995-b4d2-f2441b883b5e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T19:24:56Z
  text: {"copyright_id":"0xa23a60060db4cd0fcd8306c11c29031388ace384e81f3c7d0a6830fadb04f9cf","name":"Maria Kruse","registered_at":"2026-06-12T14:23:11Z","symbol":"NIM0324326","token_address":"0xada136d6f785b1593356c3dbe6568a2b5eee1c42","type":"artist","uuid":"fbc1a76a-7835-4995-b4d2-f2441b883b5e"}
album: Nursery Rhymes for Harp vol 1
  type: MusicAlbum
  date published: 2023-02-03
  track: Are You Sleeping? (Frère Jacques)
    type: MusicRecording
    duration: PT1M42S
    duration ms: 102407
    explicit: false
    by artist: Maria Kruse
    in album: Nursery Rhymes for Harp vol 1
      type: MusicAlbum
      date published: 2023-02-03
    isrc code: SE6N62200938
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-21T15:13:40+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x203984fb061a5c1c84b67703af71c97e0af835baccb787a402ef0c25b2eb9c87
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 959026
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/959026
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE6N62200938
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-21T15:38:13Z
    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 0x203984fb061a5c1c84b67703af71c97e0af835baccb787a402ef0c25b2eb9c87. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/SE6N62200938.
      date published: 2026-07-21T15:38:13Z
    audio: Are You Sleeping? (Frère Jacques)
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 79.808
      additional property: Musical Key
        type: PropertyValue
        value: 0
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.76
      additional property: Energy
        type: PropertyValue
        value: 0.143
      additional property: Speechiness
        type: PropertyValue
        value: 0.172
      additional property: Acousticness
        type: PropertyValue
        value: 0.993
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.963
      additional property: Liveness
        type: PropertyValue
        value: 0.1
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.533
      additional property: Loudness (dB)
        type: PropertyValue
        value: -17.099
      additional property: Key Name
        type: PropertyValue
        value: C
      additional property: Mode Name
        type: PropertyValue
        value: Major
  track: Brahms Lullaby ("Wiegenlied", Op. 49, No. 4)
    type: MusicRecording
    duration: PT1M30S
    duration ms: 90801
    explicit: false
    by artist: Maria Kruse
    in album: Nursery Rhymes for Harp vol 1
      type: MusicAlbum
      date published: 2023-02-03
    isrc code: SE6N62200939
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-22T04:14:15+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x43dfa250500464a69d34d48214086ef4ad7aa560fda8a2e6660e91d5aa18f834
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 959100
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/959100
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE6N62200939
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-22T07:16:29Z
    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 0x43dfa250500464a69d34d48214086ef4ad7aa560fda8a2e6660e91d5aa18f834. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:16:29Z), 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/SE6N62200939.
      date published: 2026-07-22T07:16:29Z
    audio: Brahms Lullaby ("Wiegenlied", Op. 49, No. 4)
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 80.692
      additional property: Musical Key
        type: PropertyValue
        value: 3
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 3
      additional property: Danceability
        type: PropertyValue
        value: 0.747
      additional property: Energy
        type: PropertyValue
        value: 0.183
      additional property: Speechiness
        type: PropertyValue
        value: 0.074
      additional property: Acousticness
        type: PropertyValue
        value: 0.995
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.973
      additional property: Liveness
        type: PropertyValue
        value: 0.111
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.67
      additional property: Loudness (dB)
        type: PropertyValue
        value: -19.884
      additional property: Key Name
      additional property: Mode Name
album: Skidamarink (Solo Harp)
album: Skidamarink

Key Name
type: PropertyValue
value: Eb

Mode Name
type: PropertyValue
value: Major

Nursery Rhymes for Harp vol 1
type: MusicAlbum
date published: 2023-02-03

Skidamarink (Solo Harp)
type: MusicAlbum
date published: 2023-06-30

Skidamarink
type: MusicAlbum
date published: 2023-06-30