Classically Contempo
type: MusicGroup
popularity: 10
followers: 737
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xd1618145a52b574557b8ccea342299b815c6b262e13a11f55f4d7cc0339f059e
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954603
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954603
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/bf807802-3126-4f5b-aa30-c91d1cd0c9a4.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/bf807802-3126-4f5b-aa30-c91d1cd0c9a4.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/bf807802-3126-4f5b-aa30-c91d1cd0c9a4
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T21:47:54Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xd1618145a52b574557b8ccea342299b815c6b262e13a11f55f4d7cc0339f059e","name":"Classically Contempo","registered_at":"2026-06-20T19:01:50Z","symbol":"NIM1684388","token_address":"0xb482a08fe5a5a183b21299c4b14386a03c331e17","type":"artist","uuid":"bf807802-3126-4f5b-aa30-c91d1cd0c9a4"}
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 0xd1618145a52b574557b8ccea342299b815c6b262e13a11f55f4d7cc0339f059e. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bf807802-3126-4f5b-aa30-c91d1cd0c9a4.json and https://artists.proofprofile.net/proofs/artist/bf807802-3126-4f5b-aa30-c91d1cd0c9a4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T21:47:54Z
  text: {"copyright_id":"0xd1618145a52b574557b8ccea342299b815c6b262e13a11f55f4d7cc0339f059e","name":"Classically Contempo","registered_at":"2026-06-20T19:01:50Z","symbol":"NIM1684388","token_address":"0xb482a08fe5a5a183b21299c4b14386a03c331e17","type":"artist","uuid":"bf807802-3126-4f5b-aa30-c91d1cd0c9a4"}
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