Birgit Hansen
type: MusicGroup
genre: polka
genre: schlager
popularity: 2
followers: 55
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x781c75291ec2ae7fd86cb3d1ffdb29c5021e6aef96946ce1605e54cb97fd6efa
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954728
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954728
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/fadec818-3a53-47cb-9795-fd83df5c6f12.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/fadec818-3a53-47cb-9795-fd83df5c6f12.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/fadec818-3a53-47cb-9795-fd83df5c6f12
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T18:08:38Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x781c75291ec2ae7fd86cb3d1ffdb29c5021e6aef96946ce1605e54cb97fd6efa","name":"Birgit Hansen","registered_at":"2026-06-21T16:41:08Z","symbol":"NIM1977540","token_address":"0x381818d2b06dbf94b9c7961a4ed687a046297d0a","type":"artist","uuid":"fadec818-3a53-47cb-9795-fd83df5c6f12"}
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 0x781c75291ec2ae7fd86cb3d1ffdb29c5021e6aef96946ce1605e54cb97fd6efa. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fadec818-3a53-47cb-9795-fd83df5c6f12.json and https://artists.proofprofile.net/proofs/artist/fadec818-3a53-47cb-9795-fd83df5c6f12.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T18:08:38Z
  text: {"copyright_id":"0x781c75291ec2ae7fd86cb3d1ffdb29c5021e6aef96946ce1605e54cb97fd6efa","name":"Birgit Hansen","registered_at":"2026-06-21T16:41:08Z","symbol":"NIM1977540","token_address":"0x381818d2b06dbf94b9c7961a4ed687a046297d0a","type":"artist","uuid":"fadec818-3a53-47cb-9795-fd83df5c6f12"}