Sigurd Löf
type: MusicGroup
genre: choral
genre: roots rock
popularity: 2
followers: 78
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x01a1aab8ca50d358c77d1b0cd19c73d2c25d06f033804522147531086b7e56a9
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953999
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953999
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/30e9f81c-5a55-4a95-9938-47b407389c45.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/30e9f81c-5a55-4a95-9938-47b407389c45.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/30e9f81c-5a55-4a95-9938-47b407389c45
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T20:20:58Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x01a1aab8ca50d358c77d1b0cd19c73d2c25d06f033804522147531086b7e56a9","name":"Sigurd Löf","registered_at":"2026-06-16T06:53:13Z","symbol":"NIM0972065","token_address":"0x6aafba9b100b6648e83abfde37d299efbebc59d5","type":"artist","uuid":"30e9f81c-5a55-4a95-9938-47b407389c45"}
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 0x01a1aab8ca50d358c77d1b0cd19c73d2c25d06f033804522147531086b7e56a9. Chain 2 (Bitcoin): anchored in block 953999 (2026-06-16T20:20:58Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/30e9f81c-5a55-4a95-9938-47b407389c45.json and https://artists.proofprofile.net/proofs/artist/30e9f81c-5a55-4a95-9938-47b407389c45.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T20:20:58Z
  text: {"copyright_id":"0x01a1aab8ca50d358c77d1b0cd19c73d2c25d06f033804522147531086b7e56a9","name":"Sigurd Löf","registered_at":"2026-06-16T06:53:13Z","symbol":"NIM0972065","token_address":"0x6aafba9b100b6648e83abfde37d299efbebc59d5","type":"artist","uuid":"30e9f81c-5a55-4a95-9938-47b407389c45"}