City Hall
type: MusicGroup
popularity: 2
followers: 287
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xe230ab1135d12b023a96daff9194a8b162609b023922d98ada1a7a46b09a9d1c
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954618
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954618
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c9d968e4-cf69-4816-8a6b-cea59e4924b4.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c9d968e4-cf69-4816-8a6b-cea59e4924b4.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/c9d968e4-cf69-4816-8a6b-cea59e4924b4
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T23:05:13Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xe230ab1135d12b023a96daff9194a8b162609b023922d98ada1a7a46b09a9d1c","name":"City Hall","registered_at":"2026-06-20T22:20:13Z","symbol":"NIM1732879","token_address":"0x144df6abacc99e5e2f9f6ac9367ec952daa8e765","type":"artist","uuid":"c9d968e4-cf69-4816-8a6b-cea59e4924b4"}
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 0xe230ab1135d12b023a96daff9194a8b162609b023922d98ada1a7a46b09a9d1c. Chain 2 (Bitcoin): anchored in block 954618 (2026-06-20T23:05:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c9d968e4-cf69-4816-8a6b-cea59e4924b4.json and https://artists.proofprofile.net/proofs/artist/c9d968e4-cf69-4816-8a6b-cea59e4924b4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T23:05:13Z
  text: {"copyright_id":"0xe230ab1135d12b023a96daff9194a8b162609b023922d98ada1a7a46b09a9d1c","name":"City Hall","registered_at":"2026-06-20T22:20:13Z","symbol":"NIM1732879","token_address":"0x144df6abacc99e5e2f9f6ac9367ec952daa8e765","type":"artist","uuid":"c9d968e4-cf69-4816-8a6b-cea59e4924b4"}
album: Say
  type: MusicAlbum
  date published: 2024-01-19
album: Radio
  type: MusicAlbum
  date published: 2024-03-22
album: Monster
  type: MusicAlbum
  date published: 2024-04-19