Marvin Haacker
type: MusicGroup
popularity: 3
followers: 84
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xe937269b6ce17f2ec4640c5e8aeb6bc651d05dfadb0760805ff9e01ea04abb2f
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953954
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953954
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2454ab3a-1bb0-440a-8e22-15dbb7b6930c.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2454ab3a-1bb0-440a-8e22-15dbb7b6930c.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/2454ab3a-1bb0-440a-8e22-15dbb7b6930c
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T14:18:37Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xe937269b6ce17f2ec4640c5e8aeb6bc651d05dfadb0760805ff9e01ea04abb2f","name":"Marvin Haacker","registered_at":"2026-06-16T02:17:12Z","symbol":"NIM0906135","token_address":"0xf4514ef37f555f21d508935a8da9263cb1ba4b92","type":"artist","uuid":"2454ab3a-1bb0-440a-8e22-15dbb7b6930c"}
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 0xe937269b6ce17f2ec4640c5e8aeb6bc651d05dfadb0760805ff9e01ea04abb2f. Chain 2 (Bitcoin): anchored in block 953954 (2026-06-16T14:18:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2454ab3a-1bb0-440a-8e22-15dbb7b6930c.json and https://artists.proofprofile.net/proofs/artist/2454ab3a-1bb0-440a-8e22-15dbb7b6930c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T14:18:37Z
  text: {"copyright_id":"0xe937269b6ce17f2ec4640c5e8aeb6bc651d05dfadb0760805ff9e01ea04abb2f","name":"Marvin Haacker","registered_at":"2026-06-16T02:17:12Z","symbol":"NIM0906135","token_address":"0xf4514ef37f555f21d508935a8da9263cb1ba4b92","type":"artist","uuid":"2454ab3a-1bb0-440a-8e22-15dbb7b6930c"}
album: Let Me Go
  type: MusicAlbum
  date published: 2020-11-06
album: By My Side
  type: MusicAlbum
  date published: 2021-01-29
album: Turn Me On
  type: MusicAlbum
  date published: 2021-02-12
album: Take Me Higher
  type: MusicAlbum
  date published: 2022-11-18
album: Hate Me
  type: MusicAlbum
  date published: 2023-02-24
album: Back To You
  type: MusicAlbum
  date published: 2023-03-31