Roelf Jacobs
type: MusicGroup
popularity: 5
followers: 325
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xfc1d2e32d8b1f8e13634a401f3d22a30979f63b3fc5284a161b864bc51ee24ba
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954693
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954693
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e7547b71-7661-4c3d-b8d5-77762465f33b.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e7547b71-7661-4c3d-b8d5-77762465f33b.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/e7547b71-7661-4c3d-b8d5-77762465f33b
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T11:50:32Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xfc1d2e32d8b1f8e13634a401f3d22a30979f63b3fc5284a161b864bc51ee24ba","name":"Roelf Jacobs","registered_at":"2026-06-21T08:48:33Z","symbol":"NIM1879923","token_address":"0x866be950806b95108f4babc08c5f36628f083d50","type":"artist","uuid":"e7547b71-7661-4c3d-b8d5-77762465f33b"}
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 0xfc1d2e32d8b1f8e13634a401f3d22a30979f63b3fc5284a161b864bc51ee24ba. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e7547b71-7661-4c3d-b8d5-77762465f33b.json and https://artists.proofprofile.net/proofs/artist/e7547b71-7661-4c3d-b8d5-77762465f33b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T11:50:32Z
  text: {"copyright_id":"0xfc1d2e32d8b1f8e13634a401f3d22a30979f63b3fc5284a161b864bc51ee24ba","name":"Roelf Jacobs","registered_at":"2026-06-21T08:48:33Z","symbol":"NIM1879923","token_address":"0x866be950806b95108f4babc08c5f36628f083d50","type":"artist","uuid":"e7547b71-7661-4c3d-b8d5-77762465f33b"}
album: Jakkals En Wolf
  type: MusicAlbum
  date published: 1978
album: Stories Oor Jakkals en Wolf
  type: MusicAlbum
  date published: 1979-10-01
album: Stories Oor Jakkals en Wolf
  type: MusicAlbum
  date published: 2003-11-14
album: Jakkals en Wolf stories (Verhale van T.O. Honiball)
  type: MusicAlbum
  date published: 2014-05-20