Masterpiece
type: MusicGroup
genre: melodic metal
genre: neoclassical
genre: power metal
genre: speed metal
genre: symphonic metal
description: thumb|upright=0.8|In painting, Leonardo da Vinci's Mona Lisa ( 1503–06) is considered an archetypal masterpiece, although it was not produced for admission to a guild or academy. A masterpiece, , or
popularity: 4
followers: 327
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x2638eb456f8e4e275acaccde0724371595d18958a8ce0e290e1f3ef56e67073a
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954631
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954631
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ce33f84e-3fc0-4000-a1d8-25368eeb0e95.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ce33f84e-3fc0-4000-a1d8-25368eeb0e95.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/ce33f84e-3fc0-4000-a1d8-25368eeb0e95
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T02:46:24Z
additional property: OTSCanonicalRecord
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 0x2638eb456f8e4e275acaccde0724371595d18958a8ce0e290e1f3ef56e67073a. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ce33f84e-3fc0-4000-a1d8-25368eeb0e95.json and https://artists.proofprofile.net/proofs/artist/ce33f84e-3fc0-4000-a1d8-25368eeb0e95.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T02:46:24Z
album: Colors Of Conflict
  type: MusicAlbum
  date published: 2006-01-01
album: Colors Of Conflict
  type: MusicAlbum
  date published: 2007-04-30