City Vocal Coach
type: MusicGroup
popularity: 6
followers: 305
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xdd0223702b131c8b7bafc31316ccf7d281ac6a51b32cc0ac9b5e849ce5d9c03b
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954069
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954069
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7a4812ba-d798-4ce6-a476-8a56a673faba.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7a4812ba-d798-4ce6-a476-8a56a673faba.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/7a4812ba-d798-4ce6-a476-8a56a673faba
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:30:25Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xdd0223702b131c8b7bafc31316ccf7d281ac6a51b32cc0ac9b5e849ce5d9c03b","name":"City Vocal Coach","registered_at":"2026-06-17T08:11:57Z","symbol":"NIM1334414","token_address":"0x56a284b7ac1054bcc4805aaeab6a8886801692fc","type":"artist","uuid":"7a4812ba-d798-4ce6-a476-8a56a673faba"}
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 0xdd0223702b131c8b7bafc31316ccf7d281ac6a51b32cc0ac9b5e849ce5d9c03b. Chain 2 (Bitcoin): anchored in block 954069 (2026-06-17T08:30:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a4812ba-d798-4ce6-a476-8a56a673faba.json and https://artists.proofprofile.net/proofs/artist/7a4812ba-d798-4ce6-a476-8a56a673faba.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:30:25Z
  text: {"copyright_id":"0xdd0223702b131c8b7bafc31316ccf7d281ac6a51b32cc0ac9b5e849ce5d9c03b","name":"City Vocal Coach","registered_at":"2026-06-17T08:11:57Z","symbol":"NIM1334414","token_address":"0x56a284b7ac1054bcc4805aaeab6a8886801692fc","type":"artist","uuid":"7a4812ba-d798-4ce6-a476-8a56a673faba"}
album: Singing Exercises Medium Male Voice Baritone
  type: MusicAlbum
  date published: 2020-03-27
album: Singing Exercises Low Female Voice Alto
  type: MusicAlbum
  date published: 2020-03-27
album: Singing Exercises High Male Voice Tenor
  type: MusicAlbum
  date published: 2020-03-27
album: Singing Exercises Medium Female Voice Mezzo Soprano
  type: MusicAlbum
  date published: 2020-03-27
album: Singing Exercises High Female Voice Soprano
  type: MusicAlbum
  date published: 2020-03-27
album: Singing Exercises Low Male Voice Bass
  type: MusicAlbum
  date published: 2020-04-06