Instrumental Hòa Tấu
type: MusicGroup
genre: traditional music
popularity: 6
followers: 363
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x8a371c7c5ff30bcd7ff60f8395a21f7d9a66b0f3f7cbf621dbadd9b4d7cf86c3
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953954
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953954
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/25289282-48f1-4e1a-881e-e066df4c4f0f.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/25289282-48f1-4e1a-881e-e066df4c4f0f.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/25289282-48f1-4e1a-881e-e066df4c4f0f
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T14:18:37Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x8a371c7c5ff30bcd7ff60f8395a21f7d9a66b0f3f7cbf621dbadd9b4d7cf86c3","name":"Instrumental Hòa Tấu","registered_at":"2026-06-16T02:46:57Z","symbol":"NIM0913249","token_address":"0x323b783a4fe69360b8ea5d40a9baa2c583a11bb7","type":"artist","uuid":"25289282-48f1-4e1a-881e-e066df4c4f0f"}
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 0x8a371c7c5ff30bcd7ff60f8395a21f7d9a66b0f3f7cbf621dbadd9b4d7cf86c3. Chain 2 (Bitcoin): anchored in block 953954 (2026-06-16T14:18:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/25289282-48f1-4e1a-881e-e066df4c4f0f.json and https://artists.proofprofile.net/proofs/artist/25289282-48f1-4e1a-881e-e066df4c4f0f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T14:18:37Z
  text: {"copyright_id":"0x8a371c7c5ff30bcd7ff60f8395a21f7d9a66b0f3f7cbf621dbadd9b4d7cf86c3","name":"Instrumental Hòa Tấu","registered_at":"2026-06-16T02:46:57Z","symbol":"NIM0913249","token_address":"0x323b783a4fe69360b8ea5d40a9baa2c583a11bb7","type":"artist","uuid":"25289282-48f1-4e1a-881e-e066df4c4f0f"}
album: Cầu vông cho bé 2
  type: MusicAlbum
  date published: 2004-01-01