Douglas Howard
type: MusicGroup
popularity: 22
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xee653d291a5a6ae738bde6d0b6f038cfed5cdad23c315576ed22843d486d9b76
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/d827ee95-38be-4567-9413-53e291af8b09.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/d827ee95-38be-4567-9413-53e291af8b09.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/d827ee95-38be-4567-9413-53e291af8b09
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xee653d291a5a6ae738bde6d0b6f038cfed5cdad23c315576ed22843d486d9b76","name":"Douglas Howard","registered_at":"2026-06-12T11:07:41Z","symbol":"NIM0279195","token_address":"0x10f42d5aba08e57a89be5d55d07dfa5f16e84df6","type":"artist","uuid":"d827ee95-38be-4567-9413-53e291af8b09"}
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 0xee653d291a5a6ae738bde6d0b6f038cfed5cdad23c315576ed22843d486d9b76. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d827ee95-38be-4567-9413-53e291af8b09.json and https://artists.proofprofile.net/proofs/artist/d827ee95-38be-4567-9413-53e291af8b09.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-12T19:24:56Z
  text: {"copyright_id":"0xee653d291a5a6ae738bde6d0b6f038cfed5cdad23c315576ed22843d486d9b76","name":"Douglas Howard","registered_at":"2026-06-12T11:07:41Z","symbol":"NIM0279195","token_address":"0x10f42d5aba08e57a89be5d55d07dfa5f16e84df6","type":"artist","uuid":"d827ee95-38be-4567-9413-53e291af8b09"}
album: Samedi
  type: MusicAlbum
  date published: 2025-02-20