Severská dvojka
type: MusicGroup
popularity: 5
followers: 341
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xa3098e40561636f069e1d70fb52e0e425b354e87fa9ac59d1f52dd47d6322579
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953882
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953882
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/0a31546a-6349-4644-92d0-8b48e6c24b68.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/0a31546a-6349-4644-92d0-8b48e6c24b68.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/0a31546a-6349-4644-92d0-8b48e6c24b68
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T03:13:34Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xa3098e40561636f069e1d70fb52e0e425b354e87fa9ac59d1f52dd47d6322579","name":"Severská dvojka","registered_at":"2026-06-15T17:08:02Z","symbol":"NIM0775090","token_address":"0xb7b22db56621663ba60b25ecccf95497f707d67e","type":"artist","uuid":"0a31546a-6349-4644-92d0-8b48e6c24b68"}
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 0xa3098e40561636f069e1d70fb52e0e425b354e87fa9ac59d1f52dd47d6322579. Chain 2 (Bitcoin): anchored in block 953882 (2026-06-16T03:13:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0a31546a-6349-4644-92d0-8b48e6c24b68.json and https://artists.proofprofile.net/proofs/artist/0a31546a-6349-4644-92d0-8b48e6c24b68.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T03:13:34Z
  text: {"copyright_id":"0xa3098e40561636f069e1d70fb52e0e425b354e87fa9ac59d1f52dd47d6322579","name":"Severská dvojka","registered_at":"2026-06-15T17:08:02Z","symbol":"NIM0775090","token_address":"0xb7b22db56621663ba60b25ecccf95497f707d67e","type":"artist","uuid":"0a31546a-6349-4644-92d0-8b48e6c24b68"}
album: Demo
  type: MusicAlbum
  date published: 2002-12-11
album: Retrostereo
  type: MusicAlbum
  date published: 2016-01-10
album: Retrostereo
  type: MusicAlbum
  date published: 2016-01-10