Ruud Appelhof
type: MusicGroup
genre: polka
popularity: 4
followers: 377
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xc9db205e0692f2dc94c1641ea47e0716bc16df0f1cb29f84cfee1176fa09ac19
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954647
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954647
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/d68feb5e-39a7-43cf-ada7-57a575318528.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/d68feb5e-39a7-43cf-ada7-57a575318528.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/d68feb5e-39a7-43cf-ada7-57a575318528
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T04:36:58Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xc9db205e0692f2dc94c1641ea47e0716bc16df0f1cb29f84cfee1176fa09ac19","name":"Ruud Appelhof","registered_at":"2026-06-21T02:54:15Z","symbol":"NIM1797870","token_address":"0x589ccfd38bf3127315a0f46ccb20be4d0b4a6287","type":"artist","uuid":"d68feb5e-39a7-43cf-ada7-57a575318528"}
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 0xc9db205e0692f2dc94c1641ea47e0716bc16df0f1cb29f84cfee1176fa09ac19. Chain 2 (Bitcoin): anchored in block 954647 (2026-06-21T04:36:58Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d68feb5e-39a7-43cf-ada7-57a575318528.json and https://artists.proofprofile.net/proofs/artist/d68feb5e-39a7-43cf-ada7-57a575318528.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T04:36:58Z
  text: {"copyright_id":"0xc9db205e0692f2dc94c1641ea47e0716bc16df0f1cb29f84cfee1176fa09ac19","name":"Ruud Appelhof","registered_at":"2026-06-21T02:54:15Z","symbol":"NIM1797870","token_address":"0x589ccfd38bf3127315a0f46ccb20be4d0b4a6287","type":"artist","uuid":"d68feb5e-39a7-43cf-ada7-57a575318528"}
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