A Cappella Harmony Quartet
type: MusicGroup
popularity: 6
followers: 587
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x4c67b542c1a957e99366581c273a418914479789cf05122b08571b3544f5e0c8
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954031
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954031
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3b3247d5-e508-4d7b-adaa-3470f9781731.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3b3247d5-e508-4d7b-adaa-3470f9781731.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/3b3247d5-e508-4d7b-adaa-3470f9781731
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T01:43:23Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x4c67b542c1a957e99366581c273a418914479789cf05122b08571b3544f5e0c8","name":"A Cappella Harmony Quartet","registered_at":"2026-06-16T10:12:17Z","symbol":"NIM1019595","token_address":"0x16f2fa94fe46f1699339835165b7ae548199ffb8","type":"artist","uuid":"3b3247d5-e508-4d7b-adaa-3470f9781731"}
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 0x4c67b542c1a957e99366581c273a418914479789cf05122b08571b3544f5e0c8. Chain 2 (Bitcoin): anchored in block 954032 (2026-06-17T01:59:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3b3247d5-e508-4d7b-adaa-3470f9781731.json and https://artists.proofprofile.net/proofs/artist/3b3247d5-e508-4d7b-adaa-3470f9781731.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T01:59:41Z
  text: {"copyright_id":"0x4c67b542c1a957e99366581c273a418914479789cf05122b08571b3544f5e0c8","name":"A Cappella Harmony Quartet","registered_at":"2026-06-16T10:12:17Z","symbol":"NIM1019595","token_address":"0x16f2fa94fe46f1699339835165b7ae548199ffb8","type":"artist","uuid":"3b3247d5-e508-4d7b-adaa-3470f9781731"}
album: Lookin' Up
  type: MusicAlbum
  date published: 2002-01-01
album: Purpose
  type: MusicAlbum
  date published: 2004-01-01
album: A Song from the Dust
  type: MusicAlbum
  date published: 2020-04-17