Gunilla Sigvardsson
type: MusicGroup
genre: christian country
genre: dansband
popularity: 17
followers: 107
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x2d94ad835016122312d0f72638c42b5f1ecf09633e5768efe152ae7064644adc
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953633
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953633
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3500d104-234c-48ab-a28d-583335e27c1d.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3500d104-234c-48ab-a28d-583335e27c1d.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/3500d104-234c-48ab-a28d-583335e27c1d
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T12:47:11Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x2d94ad835016122312d0f72638c42b5f1ecf09633e5768efe152ae7064644adc","name":"Gunilla Sigvardsson","registered_at":"2026-06-14T10:03:15Z","symbol":"NIM0418370","token_address":"0x3c5e6aa5b7deb33ce3a0dd56e223ae2640ca40c5","type":"artist","uuid":"3500d104-234c-48ab-a28d-583335e27c1d"}
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 0x2d94ad835016122312d0f72638c42b5f1ecf09633e5768efe152ae7064644adc. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3500d104-234c-48ab-a28d-583335e27c1d.json and https://artists.proofprofile.net/proofs/artist/3500d104-234c-48ab-a28d-583335e27c1d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T12:47:11Z
  text: {"copyright_id":"0x2d94ad835016122312d0f72638c42b5f1ecf09633e5768efe152ae7064644adc","name":"Gunilla Sigvardsson","registered_at":"2026-06-14T10:03:15Z","symbol":"NIM0418370","token_address":"0x3c5e6aa5b7deb33ce3a0dd56e223ae2640ca40c5","type":"artist","uuid":"3500d104-234c-48ab-a28d-583335e27c1d"}