Kaspar Hahn
type: MusicGroup
genre: ambient
popularity: 28
followers: 70
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xf89971fd64bf925e811c93650033615940562ba0ee7b83d1914a9017caf65498
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953407
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953407
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/cf4b821b-dc79-40c2-ab38-71d33e6ccf31.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/cf4b821b-dc79-40c2-ab38-71d33e6ccf31.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/cf4b821b-dc79-40c2-ab38-71d33e6ccf31
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xf89971fd64bf925e811c93650033615940562ba0ee7b83d1914a9017caf65498","name":"Kaspar Hahn","registered_at":"2026-06-12T10:12:35Z","symbol":"NIM0266397","token_address":"0x12da691bbf952f9f80e7045c748fef6747938c58","type":"artist","uuid":"cf4b821b-dc79-40c2-ab38-71d33e6ccf31"}
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 0xf89971fd64bf925e811c93650033615940562ba0ee7b83d1914a9017caf65498. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cf4b821b-dc79-40c2-ab38-71d33e6ccf31.json and https://artists.proofprofile.net/proofs/artist/cf4b821b-dc79-40c2-ab38-71d33e6ccf31.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T19:24:56Z
  text: {"copyright_id":"0xf89971fd64bf925e811c93650033615940562ba0ee7b83d1914a9017caf65498","name":"Kaspar Hahn","registered_at":"2026-06-12T10:12:35Z","symbol":"NIM0266397","token_address":"0x12da691bbf952f9f80e7045c748fef6747938c58","type":"artist","uuid":"cf4b821b-dc79-40c2-ab38-71d33e6ccf31"}
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