John Crome
type: MusicGroup
description: John Crome (22 December 176822 April 1821), once known as Old Crome to distinguish him from his artist son John Berney Crome, was an English landscape painter of the Romantic era, one of the principal
popularity: 48
followers: 307
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x4d8fb0d0475b669996384db0255c7b53e0b72654189100e4ebdb997d5173ade2
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953407
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953407
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/fe6f32d4-27da-4ef7-95e4-6f1681a9a4eb.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/fe6f32d4-27da-4ef7-95e4-6f1681a9a4eb.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/fe6f32d4-27da-4ef7-95e4-6f1681a9a4eb
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x4d8fb0d0475b669996384db0255c7b53e0b72654189100e4ebdb997d5173ade2","name":"John Crome","registered_at":"2026-06-12T14:38:18Z","symbol":"NIM0327831","token_address":"0x3999fdedc39c0a7ef1c4c90526add0a544bcdc66","type":"artist","uuid":"fe6f32d4-27da-4ef7-95e4-6f1681a9a4eb"}
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 0x4d8fb0d0475b669996384db0255c7b53e0b72654189100e4ebdb997d5173ade2. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fe6f32d4-27da-4ef7-95e4-6f1681a9a4eb.json and https://artists.proofprofile.net/proofs/artist/fe6f32d4-27da-4ef7-95e4-6f1681a9a4eb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T19:28:13Z
  text: {"copyright_id":"0x4d8fb0d0475b669996384db0255c7b53e0b72654189100e4ebdb997d5173ade2","name":"John Crome","registered_at":"2026-06-12T14:38:18Z","symbol":"NIM0327831","token_address":"0x3999fdedc39c0a7ef1c4c90526add0a544bcdc66","type":"artist","uuid":"fe6f32d4-27da-4ef7-95e4-6f1681a9a4eb"}
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