Marc Marfan
type: MusicGroup
genre: calypso
genre: soca
popularity: 9
followers: 57
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x3d0b9d604d88e31a65289e6ec772aa43af4254e99aa5bc1ed81cb964785927a0
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954549
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954549
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a83007d3-4cfe-4b02-8fdc-1684d5dba123.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a83007d3-4cfe-4b02-8fdc-1684d5dba123.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/a83007d3-4cfe-4b02-8fdc-1684d5dba123
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T10:56:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x3d0b9d604d88e31a65289e6ec772aa43af4254e99aa5bc1ed81cb964785927a0","name":"Marc Marfan","registered_at":"2026-06-20T08:31:41Z","symbol":"NIM1565879","token_address":"0xd83aec514273895686cfb841a77fbe0e7b73b7f5","type":"artist","uuid":"a83007d3-4cfe-4b02-8fdc-1684d5dba123"}
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 0x3d0b9d604d88e31a65289e6ec772aa43af4254e99aa5bc1ed81cb964785927a0. Chain 2 (Bitcoin): anchored in block 954549 (2026-06-20T10:56:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a83007d3-4cfe-4b02-8fdc-1684d5dba123.json and https://artists.proofprofile.net/proofs/artist/a83007d3-4cfe-4b02-8fdc-1684d5dba123.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T10:56:20Z
  text: {"copyright_id":"0x3d0b9d604d88e31a65289e6ec772aa43af4254e99aa5bc1ed81cb964785927a0","name":"Marc Marfan","registered_at":"2026-06-20T08:31:41Z","symbol":"NIM1565879","token_address":"0xd83aec514273895686cfb841a77fbe0e7b73b7f5","type":"artist","uuid":"a83007d3-4cfe-4b02-8fdc-1684d5dba123"}
album: Long Time (Roadmix)
  type: MusicAlbum
  date published: 2023-02-27
album: Shell Way (Roadmix)
  type: MusicAlbum
  date published: 2023-02-27