Martijn Haas
type: MusicGroup
popularity: 16
followers: 49
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xd4b408e5bbee70924ae0e98d7cd339b44f3fd01cc2b74c5fa3d8e25aaa66ab44
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953803
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953803
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e1382c07-ccec-4a6b-8cfe-501e8ddf564a.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e1382c07-ccec-4a6b-8cfe-501e8ddf564a.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/e1382c07-ccec-4a6b-8cfe-501e8ddf564a
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T15:41:00Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xd4b408e5bbee70924ae0e98d7cd339b44f3fd01cc2b74c5fa3d8e25aaa66ab44","name":"Martijn Haas","registered_at":"2026-06-15T04:11:53Z","symbol":"NIM0678152","token_address":"0xb3266b0759f761e8f1b082ad06cadf217565f73d","type":"artist","uuid":"e1382c07-ccec-4a6b-8cfe-501e8ddf564a"}
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 0xd4b408e5bbee70924ae0e98d7cd339b44f3fd01cc2b74c5fa3d8e25aaa66ab44. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e1382c07-ccec-4a6b-8cfe-501e8ddf564a.json and https://artists.proofprofile.net/proofs/artist/e1382c07-ccec-4a6b-8cfe-501e8ddf564a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T16:39:18Z
  text: {"copyright_id":"0xd4b408e5bbee70924ae0e98d7cd339b44f3fd01cc2b74c5fa3d8e25aaa66ab44","name":"Martijn Haas","registered_at":"2026-06-15T04:11:53Z","symbol":"NIM0678152","token_address":"0xb3266b0759f761e8f1b082ad06cadf217565f73d","type":"artist","uuid":"e1382c07-ccec-4a6b-8cfe-501e8ddf564a"}
album: Kouwe Ouwe [De opkomst en ondergang van Stanley Hillis: de godfather tussen Klaas Bruinsma en Willem Holleeder (Onverkort)]
  type: MusicAlbum
  date published: 2019-03-26
album: Kouwe Ouwe [De opkomst en ondergang van Stanley Hillis: de godfather tussen Klaas Bruinsma en Willem Holleeder (Onverkort)]
  type: MusicAlbum
  date published: 2019-03-26