Hans Oudenaarden
type: MusicGroup
genre: classical piano
popularity: 5
followers: 46
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x06fcf9eb9cfeb8a13acb94c63d48f70e368f272f5b6f9867049f66c73d75e107
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953918
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953918
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1ad5fb4f-7ea5-4701-8c8a-4b2b61e6a38d.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1ad5fb4f-7ea5-4701-8c8a-4b2b61e6a38d.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/1ad5fb4f-7ea5-4701-8c8a-4b2b61e6a38d
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T08:55:04Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x06fcf9eb9cfeb8a13acb94c63d48f70e368f272f5b6f9867049f66c73d75e107","name":"Hans Oudenaarden","registered_at":"2026-06-15T22:55:09Z","symbol":"NIM0857879","token_address":"0x2ce621117cbb78d7c15346df6696e92e22bab23a","type":"artist","uuid":"1ad5fb4f-7ea5-4701-8c8a-4b2b61e6a38d"}
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 0x06fcf9eb9cfeb8a13acb94c63d48f70e368f272f5b6f9867049f66c73d75e107. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1ad5fb4f-7ea5-4701-8c8a-4b2b61e6a38d.json and https://artists.proofprofile.net/proofs/artist/1ad5fb4f-7ea5-4701-8c8a-4b2b61e6a38d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T13:28:01Z
  text: {"copyright_id":"0x06fcf9eb9cfeb8a13acb94c63d48f70e368f272f5b6f9867049f66c73d75e107","name":"Hans Oudenaarden","registered_at":"2026-06-15T22:55:09Z","symbol":"NIM0857879","token_address":"0x2ce621117cbb78d7c15346df6696e92e22bab23a","type":"artist","uuid":"1ad5fb4f-7ea5-4701-8c8a-4b2b61e6a38d"}
album: Salut d'amour
  type: MusicAlbum
  date published: 1989-07-01
album: Natuurlijk
  type: MusicAlbum
  date published: 1994-01-01
album: Double Portrait
  type: MusicAlbum
  date published: 2022-03-07
album: Proficiat Ome Daan!
  type: MusicAlbum
  date published: 1994-10-10