Keff SA
type: MusicGroup
genre: gqom
popularity: 3
followers: 89
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x69c3e16a88c7fdb78b1a7ade7c4a742cb2e15a587da8c141ead5b18f7f6b22dd
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954346
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954346
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/98da3fe6-2d44-4826-9ecf-b1abf4067321.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/98da3fe6-2d44-4826-9ecf-b1abf4067321.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/98da3fe6-2d44-4826-9ecf-b1abf4067321
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-19T03:51:26Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x69c3e16a88c7fdb78b1a7ade7c4a742cb2e15a587da8c141ead5b18f7f6b22dd","name":"Keff SA","registered_at":"2026-06-17T19:03:32Z","symbol":"NIM1489802","token_address":"0x4bf16c246d255b351b23ff94d5ffd8bb4386ac0c","type":"artist","uuid":"98da3fe6-2d44-4826-9ecf-b1abf4067321"}
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 0x69c3e16a88c7fdb78b1a7ade7c4a742cb2e15a587da8c141ead5b18f7f6b22dd. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/98da3fe6-2d44-4826-9ecf-b1abf4067321.json and https://artists.proofprofile.net/proofs/artist/98da3fe6-2d44-4826-9ecf-b1abf4067321.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:51:26Z
  text: {"copyright_id":"0x69c3e16a88c7fdb78b1a7ade7c4a742cb2e15a587da8c141ead5b18f7f6b22dd","name":"Keff SA","registered_at":"2026-06-17T19:03:32Z","symbol":"NIM1489802","token_address":"0x4bf16c246d255b351b23ff94d5ffd8bb4386ac0c","type":"artist","uuid":"98da3fe6-2d44-4826-9ecf-b1abf4067321"}
album: FromNowUntilForever, Vol. 2
  type: MusicAlbum
  date published: 2022-12-23