John Marcel
type: MusicGroup
popularity: 4
followers: 45
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x08b4dbac9d754553eae927a5431ea1cc8e4bb8351d06216f4b7dc45dface972f
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954784
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954784
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e14e10fa-4b53-4c8e-ba09-4dd8204b1290.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e14e10fa-4b53-4c8e-ba09-4dd8204b1290.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/e14e10fa-4b53-4c8e-ba09-4dd8204b1290
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-22T02:53:59Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x08b4dbac9d754553eae927a5431ea1cc8e4bb8351d06216f4b7dc45dface972f","name":"John Marcel","registered_at":"2026-06-21T06:44:22Z","symbol":"NIM1852312","token_address":"0x5f84fb3cf1b9d285b9d996e3a609f4d47161d0fb","type":"artist","uuid":"e14e10fa-4b53-4c8e-ba09-4dd8204b1290"}
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 0x08b4dbac9d754553eae927a5431ea1cc8e4bb8351d06216f4b7dc45dface972f. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e14e10fa-4b53-4c8e-ba09-4dd8204b1290.json and https://artists.proofprofile.net/proofs/artist/e14e10fa-4b53-4c8e-ba09-4dd8204b1290.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-22T02:53:59Z
  text: {"copyright_id":"0x08b4dbac9d754553eae927a5431ea1cc8e4bb8351d06216f4b7dc45dface972f","name":"John Marcel","registered_at":"2026-06-21T06:44:22Z","symbol":"NIM1852312","token_address":"0x5f84fb3cf1b9d285b9d996e3a609f4d47161d0fb","type":"artist","uuid":"e14e10fa-4b53-4c8e-ba09-4dd8204b1290"}
album: Piano Romantico
  type: MusicAlbum
  date published: 2014-03-01