MC Kalvin
type: MusicGroup
popularity: 6
followers: 94
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xc3a47b9eee5c2cdecd1fbed9baddbb476bc539a1dc1c652b9a9a27452a59dd99
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954728
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954728
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f88846f6-69eb-4f09-8fd6-df27b423e2ac.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f88846f6-69eb-4f09-8fd6-df27b423e2ac.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/f88846f6-69eb-4f09-8fd6-df27b423e2ac
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T18:08:38Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xc3a47b9eee5c2cdecd1fbed9baddbb476bc539a1dc1c652b9a9a27452a59dd99","name":"MC Kalvin","registered_at":"2026-06-21T16:20:47Z","symbol":"NIM1968113","token_address":"0x015d56c9b9e0f9a8f58ed5aacd7e5a5b2dced1cd","type":"artist","uuid":"f88846f6-69eb-4f09-8fd6-df27b423e2ac"}
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 0xc3a47b9eee5c2cdecd1fbed9baddbb476bc539a1dc1c652b9a9a27452a59dd99. Chain 2 (Bitcoin): anchored in block 954729 (2026-06-21T18:16:07Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f88846f6-69eb-4f09-8fd6-df27b423e2ac.json and https://artists.proofprofile.net/proofs/artist/f88846f6-69eb-4f09-8fd6-df27b423e2ac.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T18:16:07Z
  text: {"copyright_id":"0xc3a47b9eee5c2cdecd1fbed9baddbb476bc539a1dc1c652b9a9a27452a59dd99","name":"MC Kalvin","registered_at":"2026-06-21T16:20:47Z","symbol":"NIM1968113","token_address":"0x015d56c9b9e0f9a8f58ed5aacd7e5a5b2dced1cd","type":"artist","uuid":"f88846f6-69eb-4f09-8fd6-df27b423e2ac"}
album: Porte do Ak
  type: MusicAlbum
  date published: 2024-06-10