Tarun Sarkar
type: MusicGroup
popularity: 2
followers: 399
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xd68570e3b7f66befa6dd2e47b8c4c17f035a4abeda3c59240c536827b487c11e
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954066
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954066
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/721e6514-cc71-4ceb-bc91-77b61d2958b1.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/721e6514-cc71-4ceb-bc91-77b61d2958b1.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/721e6514-cc71-4ceb-bc91-77b61d2958b1
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xd68570e3b7f66befa6dd2e47b8c4c17f035a4abeda3c59240c536827b487c11e","name":"Tarun Sarkar","registered_at":"2026-06-17T05:23:42Z","symbol":"NIM1294319","token_address":"0xaedf1df2085cc6cc249204c4d6052817725f846f","type":"artist","uuid":"721e6514-cc71-4ceb-bc91-77b61d2958b1"}
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 0xd68570e3b7f66befa6dd2e47b8c4c17f035a4abeda3c59240c536827b487c11e. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/721e6514-cc71-4ceb-bc91-77b61d2958b1.json and https://artists.proofprofile.net/proofs/artist/721e6514-cc71-4ceb-bc91-77b61d2958b1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0xd68570e3b7f66befa6dd2e47b8c4c17f035a4abeda3c59240c536827b487c11e","name":"Tarun Sarkar","registered_at":"2026-06-17T05:23:42Z","symbol":"NIM1294319","token_address":"0xaedf1df2085cc6cc249204c4d6052817725f846f","type":"artist","uuid":"721e6514-cc71-4ceb-bc91-77b61d2958b1"}
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