Kontras
type: MusicGroup
popularity: 2
followers: 392
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xa5ef9c3027e23c649d54cd6cde9820c3b09178ec8dff0776b69d3b43a461576b
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/b40cedd9-3cd5-4f67-8701-d34fe315db08.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b40cedd9-3cd5-4f67-8701-d34fe315db08.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/b40cedd9-3cd5-4f67-8701-d34fe315db08
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T07:29:20Z
additional property: OTSCanonicalRecord
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 0xa5ef9c3027e23c649d54cd6cde9820c3b09178ec8dff0776b69d3b43a461576b. 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/b40cedd9-3cd5-4f67-8701-d34fe315db08.json and https://artists.proofprofile.net/proofs/artist/b40cedd9-3cd5-4f67-8701-d34fe315db08.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T07:29:20Z
album: Side A
  type: MusicAlbum
  date published: 2018-11-30
album: Side B
  type: MusicAlbum
  date published: 2019-03-01
album: 24
  type: MusicAlbum
  date published: 2020-02-07
album: Velde
  type: MusicAlbum
  date published: 2020-03-20
album: Die Happy Song
  type: MusicAlbum
  date published: 2020-05-08
album: Mors Jou Drank
  type: MusicAlbum
  date published: 2020-06-05
album: Die Ruimtevaarder
  type: MusicAlbum
  date published: 2020-08-21
album: Vir Konteks
  type: MusicAlbum
  date published: 2020-09-11
album: Iets Is Fokken Fout Met My
  type: MusicAlbum
  date published: 2021-11-17
album: Somer Sonder Sondes
  type: MusicAlbum
  date published: 2021-11-26
album: Soos 'n Brander
  type: MusicAlbum
  date published: 2023-11-02