Heinz Feldhoff
type: MusicGroup
genre: opera
popularity: 3
followers: 35
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x515e748803e72c7cb0d8929b032fac2f9427be3cebc5eaa63f491a6b6b629ef2
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954046
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954046
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/40ef647b-120b-4396-a7c5-e3cc20413133.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/40ef647b-120b-4396-a7c5-e3cc20413133.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/40ef647b-120b-4396-a7c5-e3cc20413133
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T04:53:03Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x515e748803e72c7cb0d8929b032fac2f9427be3cebc5eaa63f491a6b6b629ef2","name":"Heinz Feldhoff","registered_at":"2026-06-16T12:12:30Z","symbol":"NIM1048263","token_address":"0xe2f3c2af9370127c9fe2f8d2772917115afee968","type":"artist","uuid":"40ef647b-120b-4396-a7c5-e3cc20413133"}
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 0x515e748803e72c7cb0d8929b032fac2f9427be3cebc5eaa63f491a6b6b629ef2. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/40ef647b-120b-4396-a7c5-e3cc20413133.json and https://artists.proofprofile.net/proofs/artist/40ef647b-120b-4396-a7c5-e3cc20413133.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:10:43Z
  text: {"copyright_id":"0x515e748803e72c7cb0d8929b032fac2f9427be3cebc5eaa63f491a6b6b629ef2","name":"Heinz Feldhoff","registered_at":"2026-06-16T12:12:30Z","symbol":"NIM1048263","token_address":"0xe2f3c2af9370127c9fe2f8d2772917115afee968","type":"artist","uuid":"40ef647b-120b-4396-a7c5-e3cc20413133"}