Contra La Contra
type: MusicGroup
genre: post-punk
popularity: 5
followers: 243
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x1af0a8e0baa58977ecdf8e8489c718d7878d61a243b3e61fa29449ef8c5abc1a
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954055
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954055
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/43b65e6b-14b2-4344-93b8-bd75f167023a.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/43b65e6b-14b2-4344-93b8-bd75f167023a.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/43b65e6b-14b2-4344-93b8-bd75f167023a
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T05:51:24Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x1af0a8e0baa58977ecdf8e8489c718d7878d61a243b3e61fa29449ef8c5abc1a","name":"Contra La Contra","registered_at":"2026-06-16T13:09:33Z","symbol":"NIM1061871","token_address":"0x11688a39355a1a6b4f97527130c2176caeb9560c","type":"artist","uuid":"43b65e6b-14b2-4344-93b8-bd75f167023a"}
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 0x1af0a8e0baa58977ecdf8e8489c718d7878d61a243b3e61fa29449ef8c5abc1a. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/43b65e6b-14b2-4344-93b8-bd75f167023a.json and https://artists.proofprofile.net/proofs/artist/43b65e6b-14b2-4344-93b8-bd75f167023a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0x1af0a8e0baa58977ecdf8e8489c718d7878d61a243b3e61fa29449ef8c5abc1a","name":"Contra La Contra","registered_at":"2026-06-16T13:09:33Z","symbol":"NIM1061871","token_address":"0x11688a39355a1a6b4f97527130c2176caeb9560c","type":"artist","uuid":"43b65e6b-14b2-4344-93b8-bd75f167023a"}
album: Ни слова о политике!
  type: MusicAlbum
  date published: 2002-02-21