Group B
type: MusicGroup
description: thumb|upright=1.3|An Audi Sport Quattro S1 E2, one of the most powerful Group B cars Group B was a set of regulations for grand touring (GT) cars used in sports car racing and rallying introduced in
popularity: 7
followers: 34
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x5c3bbf667071c5d13b06336e87a3f891dbd7467320b433446acc790fe7398333
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954065
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954065
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/4d0a1bf4-e051-40a5-817f-e14ac3c601d2.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/4d0a1bf4-e051-40a5-817f-e14ac3c601d2.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/4d0a1bf4-e051-40a5-817f-e14ac3c601d2
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:10:43Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x5c3bbf667071c5d13b06336e87a3f891dbd7467320b433446acc790fe7398333","name":"Group B","registered_at":"2026-06-16T16:44:53Z","symbol":"NIM1113245","token_address":"0xdd209874f27c32559bff5c5a2717b4c69033d104","type":"artist","uuid":"4d0a1bf4-e051-40a5-817f-e14ac3c601d2"}
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 0x5c3bbf667071c5d13b06336e87a3f891dbd7467320b433446acc790fe7398333. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4d0a1bf4-e051-40a5-817f-e14ac3c601d2.json and https://artists.proofprofile.net/proofs/artist/4d0a1bf4-e051-40a5-817f-e14ac3c601d2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:10:43Z
  text: {"copyright_id":"0x5c3bbf667071c5d13b06336e87a3f891dbd7467320b433446acc790fe7398333","name":"Group B","registered_at":"2026-06-16T16:44:53Z","symbol":"NIM1113245","token_address":"0xdd209874f27c32559bff5c5a2717b4c69033d104","type":"artist","uuid":"4d0a1bf4-e051-40a5-817f-e14ac3c601d2"}
album: Green Flag
  type: MusicAlbum
  date published: 2018-06-08
album: Sunken Meadow
  type: MusicAlbum
  date published: 2019-07-09
album: Hyacinth
  type: MusicAlbum
  date published: 2020-04-26