Kähn
type: MusicGroup
genre: dubstep
genre: grime
popularity: 2
followers: 146
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x5004135ccfcb5fbaeeae4a65be35f253189429f478fc767ee78238d3e8888e16
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954667
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954667
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c90078b3-96ab-4de0-8979-760d922141ce.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c90078b3-96ab-4de0-8979-760d922141ce.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/c90078b3-96ab-4de0-8979-760d922141ce
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T07:29:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x5004135ccfcb5fbaeeae4a65be35f253189429f478fc767ee78238d3e8888e16","name":"Kähn","registered_at":"2026-06-20T22:31:33Z","symbol":"NIM1734515","token_address":"0xfb160da26ff79b39647eb1c0aa0bcae78023381b","type":"artist","uuid":"c90078b3-96ab-4de0-8979-760d922141ce"}
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 0x5004135ccfcb5fbaeeae4a65be35f253189429f478fc767ee78238d3e8888e16. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c90078b3-96ab-4de0-8979-760d922141ce.json and https://artists.proofprofile.net/proofs/artist/c90078b3-96ab-4de0-8979-760d922141ce.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T07:29:20Z
  text: {"copyright_id":"0x5004135ccfcb5fbaeeae4a65be35f253189429f478fc767ee78238d3e8888e16","name":"Kähn","registered_at":"2026-06-20T22:31:33Z","symbol":"NIM1734515","token_address":"0xfb160da26ff79b39647eb1c0aa0bcae78023381b","type":"artist","uuid":"c90078b3-96ab-4de0-8979-760d922141ce"}
album: Way Mi Defend / Azalea
  type: MusicAlbum
  date published: 2011-09-19