Erwin Java
type: MusicGroup
genre: blues
genre: blues rock
genre: nederpop
description: Erwin Raymond Java (Assen, 1956) is a Dutch guitarist, active since the 1970s, and a music teacher. Biography Java got his first guitar, a Fender Stratocaster, from his father when he was a teenager.
popularity: 6
followers: 873
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x0d2f9cd0b7f00ebf9d7ce98224004d745eca0d96c1e5400c12124e901b3767fb
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954043
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954043
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3f48a89f-1361-44e7-813b-2946b753b75d.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3f48a89f-1361-44e7-813b-2946b753b75d.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/3f48a89f-1361-44e7-813b-2946b753b75d
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T04:15:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x0d2f9cd0b7f00ebf9d7ce98224004d745eca0d96c1e5400c12124e901b3767fb","name":"Erwin Java","registered_at":"2026-06-16T11:37:15Z","symbol":"NIM1039863","token_address":"0x976f14eba5ed7e868bccb76428b3237b8c16a03d","type":"artist","uuid":"3f48a89f-1361-44e7-813b-2946b753b75d"}
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 0x0d2f9cd0b7f00ebf9d7ce98224004d745eca0d96c1e5400c12124e901b3767fb. Chain 2 (Bitcoin): anchored in block 954043 (2026-06-17T04:15:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3f48a89f-1361-44e7-813b-2946b753b75d.json and https://artists.proofprofile.net/proofs/artist/3f48a89f-1361-44e7-813b-2946b753b75d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T04:15:20Z
  text: {"copyright_id":"0x0d2f9cd0b7f00ebf9d7ce98224004d745eca0d96c1e5400c12124e901b3767fb","name":"Erwin Java","registered_at":"2026-06-16T11:37:15Z","symbol":"NIM1039863","token_address":"0x976f14eba5ed7e868bccb76428b3237b8c16a03d","type":"artist","uuid":"3f48a89f-1361-44e7-813b-2946b753b75d"}
album: Keepin' It Real
  type: MusicAlbum
  date published: 2017
album: Keepin' It Real
  type: MusicAlbum
  date published: 2017