Hartmut Preyer
type: MusicGroup
genre: samba
genre: seresta
popularity: 10
followers: 32
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x0537d12e3f53396fe2bc17315fa88c2de9d119292af964591d074d3b4f972744
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954717
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954717
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f67d6c48-1fd7-4843-9cb5-a5bd1bdcd1cb.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f67d6c48-1fd7-4843-9cb5-a5bd1bdcd1cb.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/f67d6c48-1fd7-4843-9cb5-a5bd1bdcd1cb
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T15:47:51Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x0537d12e3f53396fe2bc17315fa88c2de9d119292af964591d074d3b4f972744","name":"Hartmut Preyer","registered_at":"2026-06-21T15:22:41Z","symbol":"NIM1959521","token_address":"0x7e48151400bb978b99ea617fe945c30c9af3b8c5","type":"artist","uuid":"f67d6c48-1fd7-4843-9cb5-a5bd1bdcd1cb"}
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0537d12e3f53396fe2bc17315fa88c2de9d119292af964591d074d3b4f972744. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f67d6c48-1fd7-4843-9cb5-a5bd1bdcd1cb.json and https://artists.proofprofile.net/proofs/artist/f67d6c48-1fd7-4843-9cb5-a5bd1bdcd1cb.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-21T15:47:51Z
  text: {"copyright_id":"0x0537d12e3f53396fe2bc17315fa88c2de9d119292af964591d074d3b4f972744","name":"Hartmut Preyer","registered_at":"2026-06-21T15:22:41Z","symbol":"NIM1959521","token_address":"0x7e48151400bb978b99ea617fe945c30c9af3b8c5","type":"artist","uuid":"f67d6c48-1fd7-4843-9cb5-a5bd1bdcd1cb"}