21st Century Vampire
type: MusicGroup
popularity: 2
followers: 616
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xad260f8ca41185a4daef2f373903df85dfde1408de01244479ae822d5918b3cc
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954342
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954342
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/83a0805f-5720-47f5-89d6-1fd3870a7a4b.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/83a0805f-5720-47f5-89d6-1fd3870a7a4b.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/83a0805f-5720-47f5-89d6-1fd3870a7a4b
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-19T03:22:39Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xad260f8ca41185a4daef2f373903df85dfde1408de01244479ae822d5918b3cc","name":"21st Century Vampire","registered_at":"2026-06-17T11:32:45Z","symbol":"NIM1382301","token_address":"0x0c8bc5662e6ebdfb81c51eeb0649a561a0a04113","type":"artist","uuid":"83a0805f-5720-47f5-89d6-1fd3870a7a4b"}
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 0xad260f8ca41185a4daef2f373903df85dfde1408de01244479ae822d5918b3cc. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/83a0805f-5720-47f5-89d6-1fd3870a7a4b.json and https://artists.proofprofile.net/proofs/artist/83a0805f-5720-47f5-89d6-1fd3870a7a4b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:22:39Z
  text: {"copyright_id":"0xad260f8ca41185a4daef2f373903df85dfde1408de01244479ae822d5918b3cc","name":"21st Century Vampire","registered_at":"2026-06-17T11:32:45Z","symbol":"NIM1382301","token_address":"0x0c8bc5662e6ebdfb81c51eeb0649a561a0a04113","type":"artist","uuid":"83a0805f-5720-47f5-89d6-1fd3870a7a4b"}
album: 21cv
  type: MusicAlbum
  date published: 2021-01-21
album: In the Dark
  type: MusicAlbum
  date published: 2021-02-19
album: Cut Up
  type: MusicAlbum
  date published: 2021-09-21
album: 21st Century Vampire
  type: MusicAlbum
  date published: 2021-12-24