Machteld van der Gaag
type: MusicGroup
genre: chanson
popularity: 8
followers: 128
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x8855adc69551b1d71ca02a36123a23d7909d8e9d3d13972b27102a4c3509bd55
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954346
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954346
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9adcf94e-07e1-45cc-822a-97198b264a5d.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9adcf94e-07e1-45cc-822a-97198b264a5d.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/9adcf94e-07e1-45cc-822a-97198b264a5d
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-19T03:51:26Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x8855adc69551b1d71ca02a36123a23d7909d8e9d3d13972b27102a4c3509bd55","name":"Machteld van der Gaag","registered_at":"2026-06-17T20:00:32Z","symbol":"NIM1499282","token_address":"0x19cd919a1e0b52d4ecac4b819f2786f31cf45c34","type":"artist","uuid":"9adcf94e-07e1-45cc-822a-97198b264a5d"}
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 0x8855adc69551b1d71ca02a36123a23d7909d8e9d3d13972b27102a4c3509bd55. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9adcf94e-07e1-45cc-822a-97198b264a5d.json and https://artists.proofprofile.net/proofs/artist/9adcf94e-07e1-45cc-822a-97198b264a5d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:51:26Z
  text: {"copyright_id":"0x8855adc69551b1d71ca02a36123a23d7909d8e9d3d13972b27102a4c3509bd55","name":"Machteld van der Gaag","registered_at":"2026-06-17T20:00:32Z","symbol":"NIM1499282","token_address":"0x19cd919a1e0b52d4ecac4b819f2786f31cf45c34","type":"artist","uuid":"9adcf94e-07e1-45cc-822a-97198b264a5d"}
album: Catwalks & Cowboys
  type: MusicAlbum
  date published: 2019-10-08
album: Catwalks & Cowboys [English edition (Unabridged)]
  type: MusicAlbum
  date published: 2020-02-21
album: Machteld chante Barbara
  type: MusicAlbum
  date published: 2020-11-01
album: Sammy
  type: MusicAlbum
  date published: 2022-01-25
album: L'aigle noir
  type: MusicAlbum
  date published: 2023-04-09
album: Machteld chante Barbara 2
  type: MusicAlbum
  date published: 2023-06-08
album: Restons ensemble
  type: MusicAlbum
  date published: 2023-12-01
album: Machteld chante Shaffy
  type: MusicAlbum
  date published: 2023-12-08