The Sewer Cats
type: MusicGroup
genre: deathrock
popularity: 6
followers: 646
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xb072756ff552f3a5a9c542d4eb331cb8568c17904784965513bce1cffeabdd45
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953947
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953947
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/21d8e045-4f90-47b4-9434-c4e14355b2ab.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/21d8e045-4f90-47b4-9434-c4e14355b2ab.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/21d8e045-4f90-47b4-9434-c4e14355b2ab
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T13:14:26Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xb072756ff552f3a5a9c542d4eb331cb8568c17904784965513bce1cffeabdd45","name":"The Sewer Cats","registered_at":"2026-06-16T01:23:05Z","symbol":"NIM0893206","token_address":"0xe08d54404ffab2c94d1062b41014e6ca7747abfc","type":"artist","uuid":"21d8e045-4f90-47b4-9434-c4e14355b2ab"}
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 0xb072756ff552f3a5a9c542d4eb331cb8568c17904784965513bce1cffeabdd45. Chain 2 (Bitcoin): anchored in block 953947 (2026-06-16T13:14:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/21d8e045-4f90-47b4-9434-c4e14355b2ab.json and https://artists.proofprofile.net/proofs/artist/21d8e045-4f90-47b4-9434-c4e14355b2ab.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T13:14:26Z
  text: {"copyright_id":"0xb072756ff552f3a5a9c542d4eb331cb8568c17904784965513bce1cffeabdd45","name":"The Sewer Cats","registered_at":"2026-06-16T01:23:05Z","symbol":"NIM0893206","token_address":"0xe08d54404ffab2c94d1062b41014e6ca7747abfc","type":"artist","uuid":"21d8e045-4f90-47b4-9434-c4e14355b2ab"}
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