A Grape Dope
type: MusicGroup
description: John Herndon (born April 9, 1966) is an American musician and artist. Based in Chicago, he was a founding member of the post-rock band Tortoise, where he plays drums and percussion. Herndon also work
popularity: 3
followers: 984
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x57a768862159e878ba20aca1eb38e7a214c3aa4fa4dd8c0bd0013d66ea8860b0
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954533
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954533
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a6fac04d-9ee5-4088-84da-0c33d9234702.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a6fac04d-9ee5-4088-84da-0c33d9234702.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/a6fac04d-9ee5-4088-84da-0c33d9234702
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T08:57:02Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x57a768862159e878ba20aca1eb38e7a214c3aa4fa4dd8c0bd0013d66ea8860b0","name":"A Grape Dope","registered_at":"2026-06-20T08:02:57Z","symbol":"NIM1560920","token_address":"0x6e91f522fc4c95d7af255d6ac4da1d589f328610","type":"artist","uuid":"a6fac04d-9ee5-4088-84da-0c33d9234702"}
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a768862159e878ba20aca1eb38e7a214c3aa4fa4dd8c0bd0013d66ea8860b0. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a6fac04d-9ee5-4088-84da-0c33d9234702.json and https://artists.proofprofile.net/proofs/artist/a6fac04d-9ee5-4088-84da-0c33d9234702.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T08:57:02Z
  text: {"copyright_id":"0x57a768862159e878ba20aca1eb38e7a214c3aa4fa4dd8c0bd0013d66ea8860b0","name":"A Grape Dope","registered_at":"2026-06-20T08:02:57Z","symbol":"NIM1560920","token_address":"0x6e91f522fc4c95d7af255d6ac4da1d589f328610","type":"artist","uuid":"a6fac04d-9ee5-4088-84da-0c33d9234702"}
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  type: MusicAlbum
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  type: MusicAlbum
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  type: MusicAlbum
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  type: MusicAlbum
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