Marcel East
type: MusicGroup
genre: indie pop
popularity: 6
followers: 164
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xa1af34547054ddc6abaafd66e012a73c39ff4aa88f84658fde8f57c6a2aa32fc
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/f859804d-f781-4761-afb2-32e3512a78be.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f859804d-f781-4761-afb2-32e3512a78be.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/f859804d-f781-4761-afb2-32e3512a78be
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T18:08:38Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xa1af34547054ddc6abaafd66e012a73c39ff4aa88f84658fde8f57c6a2aa32fc","name":"Marcel East","registered_at":"2026-06-21T16:04:01Z","symbol":"NIM1968719","token_address":"0x48377de4b0d4c5a7a1e1c358c4445dd311d38a5c","type":"artist","uuid":"f859804d-f781-4761-afb2-32e3512a78be"}
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 0xa1af34547054ddc6abaafd66e012a73c39ff4aa88f84658fde8f57c6a2aa32fc. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f859804d-f781-4761-afb2-32e3512a78be.json and https://artists.proofprofile.net/proofs/artist/f859804d-f781-4761-afb2-32e3512a78be.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-21T18:08:38Z
  text: {"copyright_id":"0xa1af34547054ddc6abaafd66e012a73c39ff4aa88f84658fde8f57c6a2aa32fc","name":"Marcel East","registered_at":"2026-06-21T16:04:01Z","symbol":"NIM1968719","token_address":"0x48377de4b0d4c5a7a1e1c358c4445dd311d38a5c","type":"artist","uuid":"f859804d-f781-4761-afb2-32e3512a78be"}
album: Found Forever
  type: MusicAlbum
  date published: 2020-09-25