Mr Tac
type: MusicGroup
popularity: 6
followers: 28
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x3b220ac9628db95fdea4f332246eb2557d1fbe49fef3c5309c7a0f6b71eaab6c
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954573
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954573
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b4dca08b-592d-4c25-a984-5c097911437f.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b4dca08b-592d-4c25-a984-5c097911437f.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/b4dca08b-592d-4c25-a984-5c097911437f
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T15:45:29Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x3b220ac9628db95fdea4f332246eb2557d1fbe49fef3c5309c7a0f6b71eaab6c","name":"Mr Tac","registered_at":"2026-06-20T13:58:18Z","symbol":"NIM1626168","token_address":"0xfabf79e55c048df26b2f76b239ae835fcb5b771f","type":"artist","uuid":"b4dca08b-592d-4c25-a984-5c097911437f"}
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 0x3b220ac9628db95fdea4f332246eb2557d1fbe49fef3c5309c7a0f6b71eaab6c. Chain 2 (Bitcoin): anchored in block 954573 (2026-06-20T15:45:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b4dca08b-592d-4c25-a984-5c097911437f.json and https://artists.proofprofile.net/proofs/artist/b4dca08b-592d-4c25-a984-5c097911437f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T15:45:29Z
  text: {"copyright_id":"0x3b220ac9628db95fdea4f332246eb2557d1fbe49fef3c5309c7a0f6b71eaab6c","name":"Mr Tac","registered_at":"2026-06-20T13:58:18Z","symbol":"NIM1626168","token_address":"0xfabf79e55c048df26b2f76b239ae835fcb5b771f","type":"artist","uuid":"b4dca08b-592d-4c25-a984-5c097911437f"}