Koninklijke Zangvereniging Mastreechter Staar
type: MusicGroup
popularity: 4
followers: 28
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x11eb52d2139ab7361c5c3c4c5eb996117e0e5834f39655605fc708a9287b6c43
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953869
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953869
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/06b71792-d5ba-4b3a-97c3-033f0c3d392d.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/06b71792-d5ba-4b3a-97c3-033f0c3d392d.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/06b71792-d5ba-4b3a-97c3-033f0c3d392d
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T01:20:04Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x11eb52d2139ab7361c5c3c4c5eb996117e0e5834f39655605fc708a9287b6c43","name":"Koninklijke Zangvereniging Mastreechter Staar","registered_at":"2026-06-15T15:51:33Z","symbol":"NIM0756832","token_address":"0x9bf49d69eee66d341364c0a5492292005e1a8f2a","type":"artist","uuid":"06b71792-d5ba-4b3a-97c3-033f0c3d392d"}
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 0x11eb52d2139ab7361c5c3c4c5eb996117e0e5834f39655605fc708a9287b6c43. Chain 2 (Bitcoin): anchored in block 953869 (2026-06-16T01:20:04Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/06b71792-d5ba-4b3a-97c3-033f0c3d392d.json and https://artists.proofprofile.net/proofs/artist/06b71792-d5ba-4b3a-97c3-033f0c3d392d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T01:20:04Z
  text: {"copyright_id":"0x11eb52d2139ab7361c5c3c4c5eb996117e0e5834f39655605fc708a9287b6c43","name":"Koninklijke Zangvereniging Mastreechter Staar","registered_at":"2026-06-15T15:51:33Z","symbol":"NIM0756832","token_address":"0x9bf49d69eee66d341364c0a5492292005e1a8f2a","type":"artist","uuid":"06b71792-d5ba-4b3a-97c3-033f0c3d392d"}
track: Piet Hein (de Zilvervloot)

Piet Hein (de Zilvervloot)
type: MusicRecording
duration: PT2M34S
duration ms: 154000
explicit: false
by artist: Jan Pieter Heye
by artist: Koninklijke Zangvereniging Mastreechter Staar
by artist: Paul Voncken
in album: Majesteit.... Bedankt!
  type: MusicAlbum
  date published: 2008-03-31
isrc code: NLC351348006
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-21T21:01:56+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x1e72c7fd9a8771df09e7d3f44ea6c2d96dd4b97d2b3fa8bf86520c7aa055ee95
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956302
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956302
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLC351348006
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-02T03:30:09Z
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
additional property: ProofProfileEvidenceStatus
  type: PropertyValue
  value: verified-cc-db-prod
additional property: TokenDeploymentConfirmed
  type: PropertyValue
  value: true
additional property: ContentHash
additional property: BitcoinBlock
  type: PropertyValue
  value: 956302
additional property: BitcoinTime
  type: PropertyValue
  value: 2026-07-02T03:30:09+00:00
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e72c7fd9a8771df09e7d3f44ea6c2d96dd4b97d2b3fa8bf86520c7aa055ee95. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLC351348006.
  date published: 2026-07-02T03:30:09Z
audio: Piet Hein (de Zilvervloot)
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 140.66
  additional property: Musical Key
    type: PropertyValue
    value: 5
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.531
  additional property: Energy
    type: PropertyValue
    value: 0.38
  additional property: Speechiness
    type: PropertyValue
    value: 0.047
  additional property: Acousticness
    type: PropertyValue
    value: 0.994
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.111
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.519
  additional property: Loudness (dB)
    type: PropertyValue
    value: -18.186
  additional property: Key Name
    type: PropertyValue
    value: F
  additional property: Mode Name
    type: PropertyValue
    value: Major