Long Gone John
type: MusicGroup
description: John Mermis (born ), known as Long Gone John, is an American entrepreneur best known for his record label, Sympathy for the Record Industry, and his vinyl toy company, Necessaries Toy Foundation. He
popularity: 2
followers: 255
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x69411dfefb1d1249e4b04d0719957076d06562a2f3f343c75667ce90972fbb91
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954693
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954693
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ea30f86d-6ca4-4e50-9885-25c73b124bc2.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ea30f86d-6ca4-4e50-9885-25c73b124bc2.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/ea30f86d-6ca4-4e50-9885-25c73b124bc2
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T11:50:32Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x69411dfefb1d1249e4b04d0719957076d06562a2f3f343c75667ce90972fbb91","name":"Long Gone John","registered_at":"2026-06-21T10:06:41Z","symbol":"NIM1894970","token_address":"0x2176a17bf7f87217d4dd700a04b4b6f933fb0f8b","type":"artist","uuid":"ea30f86d-6ca4-4e50-9885-25c73b124bc2"}
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 0x69411dfefb1d1249e4b04d0719957076d06562a2f3f343c75667ce90972fbb91. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ea30f86d-6ca4-4e50-9885-25c73b124bc2.json and https://artists.proofprofile.net/proofs/artist/ea30f86d-6ca4-4e50-9885-25c73b124bc2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T11:50:32Z
  text: {"copyright_id":"0x69411dfefb1d1249e4b04d0719957076d06562a2f3f343c75667ce90972fbb91","name":"Long Gone John","registered_at":"2026-06-21T10:06:41Z","symbol":"NIM1894970","token_address":"0x2176a17bf7f87217d4dd700a04b4b6f933fb0f8b","type":"artist","uuid":"ea30f86d-6ca4-4e50-9885-25c73b124bc2"}
album: This One Here
  type: MusicAlbum
  date published: 2018-09-11
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  type: MusicAlbum
  date published: 2018-11-01
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  type: MusicAlbum
  date published: 2024-07-12
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  type: MusicAlbum
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  type: MusicAlbum
  date published: 2024-08-17