Jan Engervik
type: MusicGroup
genre: swedish ballads
popularity: 2
followers: 330
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x874854f153738baa20328838d8f5cfd96d6e5d1ec874c16999a1a33a9005e500
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954066
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954066
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/5d312818-c748-42ee-9e41-2f43f663e885.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/5d312818-c748-42ee-9e41-2f43f663e885.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/5d312818-c748-42ee-9e41-2f43f663e885
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x874854f153738baa20328838d8f5cfd96d6e5d1ec874c16999a1a33a9005e500","name":"Jan Engervik","registered_at":"2026-06-16T22:24:48Z","symbol":"NIM1194355","token_address":"0xfc9bf83899c1e8c58969a60a2c8c364cb84dbde3","type":"artist","uuid":"5d312818-c748-42ee-9e41-2f43f663e885"}
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 0x874854f153738baa20328838d8f5cfd96d6e5d1ec874c16999a1a33a9005e500. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5d312818-c748-42ee-9e41-2f43f663e885.json and https://artists.proofprofile.net/proofs/artist/5d312818-c748-42ee-9e41-2f43f663e885.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0x874854f153738baa20328838d8f5cfd96d6e5d1ec874c16999a1a33a9005e500","name":"Jan Engervik","registered_at":"2026-06-16T22:24:48Z","symbol":"NIM1194355","token_address":"0xfc9bf83899c1e8c58969a60a2c8c364cb84dbde3","type":"artist","uuid":"5d312818-c748-42ee-9e41-2f43f663e885"}
album: Evert Taube: 30 Viser
  type: MusicAlbum
  date published: 2012-05-11