Massive Crew
type: MusicGroup
genre: ragga
genre: roots reggae
popularity: 10
followers: 75
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x3a8e4cc5ec4b994f171847131976ec5120d2a956abc92d4cce61d2952b8e96f3
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954342
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954342
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/83ad1ee8-443d-4c80-9a4c-e74b88b929b2.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/83ad1ee8-443d-4c80-9a4c-e74b88b929b2.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/83ad1ee8-443d-4c80-9a4c-e74b88b929b2
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-19T03:22:39Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x3a8e4cc5ec4b994f171847131976ec5120d2a956abc92d4cce61d2952b8e96f3","name":"Massive Crew","registered_at":"2026-06-17T11:31:16Z","symbol":"NIM1381943","token_address":"0x495721c9322b3005276401c2b5be5169478120eb","type":"artist","uuid":"83ad1ee8-443d-4c80-9a4c-e74b88b929b2"}
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 0x3a8e4cc5ec4b994f171847131976ec5120d2a956abc92d4cce61d2952b8e96f3. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/83ad1ee8-443d-4c80-9a4c-e74b88b929b2.json and https://artists.proofprofile.net/proofs/artist/83ad1ee8-443d-4c80-9a4c-e74b88b929b2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:22:39Z
  text: {"copyright_id":"0x3a8e4cc5ec4b994f171847131976ec5120d2a956abc92d4cce61d2952b8e96f3","name":"Massive Crew","registered_at":"2026-06-17T11:31:16Z","symbol":"NIM1381943","token_address":"0x495721c9322b3005276401c2b5be5169478120eb","type":"artist","uuid":"83ad1ee8-443d-4c80-9a4c-e74b88b929b2"}
album: Nawf Siide Riches, Pt. 1
  type: MusicAlbum
  date published: 2020-01-03
album: Nawf Siide Riches, Pt. 2
  type: MusicAlbum
  date published: 2020-01-05
album: In New York
  type: MusicAlbum
  date published: 2020-02-20
album: Taste for Nasty, Cassper & Aka
  type: MusicAlbum
  date published: 2020-04-19