Apurbo Karmokar
type: MusicGroup
genre: bangla pop
popularity: 6
followers: 10949
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x9b5807fa42d39438818b036447a6a81f118c9d2712f5140011e223e7747f1126
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/55e117c9-7517-4947-b99c-f45d1f1ee022.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/55e117c9-7517-4947-b99c-f45d1f1ee022.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/55e117c9-7517-4947-b99c-f45d1f1ee022
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:10:43Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x9b5807fa42d39438818b036447a6a81f118c9d2712f5140011e223e7747f1126","name":"Apurbo Karmokar","registered_at":"2026-06-16T19:36:33Z","symbol":"NIM1154205","token_address":"0x6f7885abbd9324dbdcdaa70cf6e30e1aea940b63","type":"artist","uuid":"55e117c9-7517-4947-b99c-f45d1f1ee022"}
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 0x9b5807fa42d39438818b036447a6a81f118c9d2712f5140011e223e7747f1126. 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/55e117c9-7517-4947-b99c-f45d1f1ee022.json and https://artists.proofprofile.net/proofs/artist/55e117c9-7517-4947-b99c-f45d1f1ee022.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:10:43Z
  text: {"copyright_id":"0x9b5807fa42d39438818b036447a6a81f118c9d2712f5140011e223e7747f1126","name":"Apurbo Karmokar","registered_at":"2026-06-16T19:36:33Z","symbol":"NIM1154205","token_address":"0x6f7885abbd9324dbdcdaa70cf6e30e1aea940b63","type":"artist","uuid":"55e117c9-7517-4947-b99c-f45d1f1ee022"}
album: Neshar Bojha
  type: MusicAlbum
  date published: 2010-01-01
album: EKTI BRISHTIR GOLPO (ACOUSTIC VERSION)
  type: MusicAlbum
  date published: 2021-10-01