CatCall A Cappella
type: MusicGroup
popularity: 7
followers: 344
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x7ea4c8cd1ffe3cd278def794ce98c94c57f6e846376c2bbdf52933e1f36bd36f
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953996
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953996
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/30d66a6a-248b-4479-9228-bd09f40245d1.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/30d66a6a-248b-4479-9228-bd09f40245d1.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/30d66a6a-248b-4479-9228-bd09f40245d1
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T20:04:35Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x7ea4c8cd1ffe3cd278def794ce98c94c57f6e846376c2bbdf52933e1f36bd36f","name":"CatCall A Cappella","registered_at":"2026-06-16T06:37:14Z","symbol":"NIM0968253","token_address":"0xabdf404c33336d37da8bd33bdb66bef77e7bdca4","type":"artist","uuid":"30d66a6a-248b-4479-9228-bd09f40245d1"}
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 0x7ea4c8cd1ffe3cd278def794ce98c94c57f6e846376c2bbdf52933e1f36bd36f. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/30d66a6a-248b-4479-9228-bd09f40245d1.json and https://artists.proofprofile.net/proofs/artist/30d66a6a-248b-4479-9228-bd09f40245d1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T20:07:57Z
  text: {"copyright_id":"0x7ea4c8cd1ffe3cd278def794ce98c94c57f6e846376c2bbdf52933e1f36bd36f","name":"CatCall A Cappella","registered_at":"2026-06-16T06:37:14Z","symbol":"NIM0968253","token_address":"0xabdf404c33336d37da8bd33bdb66bef77e7bdca4","type":"artist","uuid":"30d66a6a-248b-4479-9228-bd09f40245d1"}
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