Nina Den Hartog
type: MusicGroup
popularity: 4
followers: 1630
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x157c2bac3b3842ad52cc66d7bc6386bf4a4258c0f9c37390ce2e59cad66bb69d
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954603
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954603
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c225af97-aede-48b6-b373-fdafecc099c3.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c225af97-aede-48b6-b373-fdafecc099c3.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/c225af97-aede-48b6-b373-fdafecc099c3
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T21:47:54Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x157c2bac3b3842ad52cc66d7bc6386bf4a4258c0f9c37390ce2e59cad66bb69d","name":"Nina Den Hartog","registered_at":"2026-06-20T19:30:06Z","symbol":"NIM1695084","token_address":"0x350461116aefd125582f1e0c487923d21e36e3cc","type":"artist","uuid":"c225af97-aede-48b6-b373-fdafecc099c3"}
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 0x157c2bac3b3842ad52cc66d7bc6386bf4a4258c0f9c37390ce2e59cad66bb69d. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c225af97-aede-48b6-b373-fdafecc099c3.json and https://artists.proofprofile.net/proofs/artist/c225af97-aede-48b6-b373-fdafecc099c3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T21:47:54Z
  text: {"copyright_id":"0x157c2bac3b3842ad52cc66d7bc6386bf4a4258c0f9c37390ce2e59cad66bb69d","name":"Nina Den Hartog","registered_at":"2026-06-20T19:30:06Z","symbol":"NIM1695084","token_address":"0x350461116aefd125582f1e0c487923d21e36e3cc","type":"artist","uuid":"c225af97-aede-48b6-b373-fdafecc099c3"}
album: It Will Rain
  type: MusicAlbum
  date published: 2016-05-18
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  type: MusicAlbum
  date published: 2016-05-25
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  type: MusicAlbum
  date published: 2016-06-07
album: Lights Go Out
  type: MusicAlbum
  date published: 2016-06-07
album: Bodies In The Sun (Kenn Colt Remix)
  type: MusicAlbum
  date published: 2016-09-09
album: Bodies In The Sun (Kenn Colt Remix)
  type: MusicAlbum
  date published: 2016-09-09
album: Bodies in the Sun (Kenn Colt Remix)
  type: MusicAlbum
  date published: 2016-09-16
album: Bodies In The Sun
  type: MusicAlbum
  date published: 2016-10-21
album: Bodies In The Sun (Kenn Colt Remix)
  type: MusicAlbum
  date published: 2017-01-17