Obsidienne Vocal Ensemble
type: MusicGroup
genre: medieval
popularity: 2
followers: 62
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xe5705ffed5f2557623dba213c700b7e50f0ac88b3718030f4fa28ac08496f438
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953892
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953892
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/0ec35690-ccf1-4b2f-998a-d3ffd39edda9.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/0ec35690-ccf1-4b2f-998a-d3ffd39edda9.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/0ec35690-ccf1-4b2f-998a-d3ffd39edda9
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T05:01:46Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xe5705ffed5f2557623dba213c700b7e50f0ac88b3718030f4fa28ac08496f438","name":"Obsidienne Vocal Ensemble","registered_at":"2026-06-15T18:33:00Z","symbol":"NIM0795364","token_address":"0x2d156ac2dc1c94c297798dd90619ed233690b3fc","type":"artist","uuid":"0ec35690-ccf1-4b2f-998a-d3ffd39edda9"}
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 0xe5705ffed5f2557623dba213c700b7e50f0ac88b3718030f4fa28ac08496f438. Chain 2 (Bitcoin): anchored in block 953892 (2026-06-16T05:01:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0ec35690-ccf1-4b2f-998a-d3ffd39edda9.json and https://artists.proofprofile.net/proofs/artist/0ec35690-ccf1-4b2f-998a-d3ffd39edda9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T05:01:46Z
  text: {"copyright_id":"0xe5705ffed5f2557623dba213c700b7e50f0ac88b3718030f4fa28ac08496f438","name":"Obsidienne Vocal Ensemble","registered_at":"2026-06-15T18:33:00Z","symbol":"NIM0795364","token_address":"0x2d156ac2dc1c94c297798dd90619ed233690b3fc","type":"artist","uuid":"0ec35690-ccf1-4b2f-998a-d3ffd39edda9"}
album: Machaut: Messe Nostre Dame - Motets et estampies du XIVe siècle
  type: MusicAlbum
  date published: 2011-04-01
album: Machaut: Messe Nostre Dame - Motets et estampies du XIVe siècle
  type: MusicAlbum
  date published: 2011-04-01