Mr. Eff
type: MusicGroup
genre: synthwave
popularity: 3
followers: 413
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x144464f3fb1eab89f8b0f3e7c515d119413d022d32bc96649d79ab922452798b
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/aa8f6881-bc48-432d-8207-4dc55e549c2d.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/aa8f6881-bc48-432d-8207-4dc55e549c2d.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/aa8f6881-bc48-432d-8207-4dc55e549c2d
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T10:56:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x144464f3fb1eab89f8b0f3e7c515d119413d022d32bc96649d79ab922452798b","name":"Mr. Eff","registered_at":"2026-06-20T09:23:31Z","symbol":"NIM1578837","token_address":"0x50412612cca267b0bc0968a9376a07a1a676fceb","type":"artist","uuid":"aa8f6881-bc48-432d-8207-4dc55e549c2d"}
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x144464f3fb1eab89f8b0f3e7c515d119413d022d32bc96649d79ab922452798b. 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/aa8f6881-bc48-432d-8207-4dc55e549c2d.json and https://artists.proofprofile.net/proofs/artist/aa8f6881-bc48-432d-8207-4dc55e549c2d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T10:56:20Z
  text: {"copyright_id":"0x144464f3fb1eab89f8b0f3e7c515d119413d022d32bc96649d79ab922452798b","name":"Mr. Eff","registered_at":"2026-06-20T09:23:31Z","symbol":"NIM1578837","token_address":"0x50412612cca267b0bc0968a9376a07a1a676fceb","type":"artist","uuid":"aa8f6881-bc48-432d-8207-4dc55e549c2d"}
album: The Parallel
  type: MusicAlbum
  date published: 2017-10-10
album: Eyes Down
  type: MusicAlbum
  date published: 2019-09-20
album: Nostalgia Confessions
  type: MusicAlbum
  date published: 2021-04-30