Chór Kameralny Quattro Voci
type: MusicGroup
popularity: 2
followers: 1
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xd276818a3fdd0fd01a56d1a47121e9b11c782e7a4c5c2c8b5b417ad75a2350e3
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953933
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953933
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2011a4e8-4db2-4a02-8725-4f09c9cdc08b.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2011a4e8-4db2-4a02-8725-4f09c9cdc08b.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/2011a4e8-4db2-4a02-8725-4f09c9cdc08b
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T11:13:24Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xd276818a3fdd0fd01a56d1a47121e9b11c782e7a4c5c2c8b5b417ad75a2350e3","name":"Chór Kameralny Quattro Voci","registered_at":"2026-06-16T00:35:32Z","symbol":"NIM0881855","token_address":"0x73949f246b3af6aed5bce882b779712c1eb9fbb1","type":"artist","uuid":"2011a4e8-4db2-4a02-8725-4f09c9cdc08b"}
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 0xd276818a3fdd0fd01a56d1a47121e9b11c782e7a4c5c2c8b5b417ad75a2350e3. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2011a4e8-4db2-4a02-8725-4f09c9cdc08b.json and https://artists.proofprofile.net/proofs/artist/2011a4e8-4db2-4a02-8725-4f09c9cdc08b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T13:28:01Z
  text: {"copyright_id":"0xd276818a3fdd0fd01a56d1a47121e9b11c782e7a4c5c2c8b5b417ad75a2350e3","name":"Chór Kameralny Quattro Voci","registered_at":"2026-06-16T00:35:32Z","symbol":"NIM0881855","token_address":"0x73949f246b3af6aed5bce882b779712c1eb9fbb1","type":"artist","uuid":"2011a4e8-4db2-4a02-8725-4f09c9cdc08b"}