Black Cat
type: MusicGroup
description: right|thumb|A black cat resting on a fence A black cat is a domestic cat with black fur. They may be a specific breed, or a common domestic cat of no particular breed. Most black cats have golden iri
popularity: 4
followers: 186
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x51538aef72ac55f6ee50c0ddf7117d88db383326c7ac55014d7f9ca97c6a38ba
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954569
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954569
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b12e8d8d-12fd-4105-b07f-2730ec5bc796.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b12e8d8d-12fd-4105-b07f-2730ec5bc796.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/b12e8d8d-12fd-4105-b07f-2730ec5bc796
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T14:36:29Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x51538aef72ac55f6ee50c0ddf7117d88db383326c7ac55014d7f9ca97c6a38ba","name":"Black Cat","registered_at":"2026-06-20T12:14:11Z","symbol":"NIM1610248","token_address":"0x030bf7fa1224b2e59cf4cc9fcde8a01301982531","type":"artist","uuid":"b12e8d8d-12fd-4105-b07f-2730ec5bc796"}
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 0x51538aef72ac55f6ee50c0ddf7117d88db383326c7ac55014d7f9ca97c6a38ba. Chain 2 (Bitcoin): anchored in block 954569 (2026-06-20T14:36:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b12e8d8d-12fd-4105-b07f-2730ec5bc796.json and https://artists.proofprofile.net/proofs/artist/b12e8d8d-12fd-4105-b07f-2730ec5bc796.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T14:36:29Z
  text: {"copyright_id":"0x51538aef72ac55f6ee50c0ddf7117d88db383326c7ac55014d7f9ca97c6a38ba","name":"Black Cat","registered_at":"2026-06-20T12:14:11Z","symbol":"NIM1610248","token_address":"0x030bf7fa1224b2e59cf4cc9fcde8a01301982531","type":"artist","uuid":"b12e8d8d-12fd-4105-b07f-2730ec5bc796"}
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