Rostislav Vacek
type: MusicGroup
genre: progressive metal
popularity: 3
followers: 90
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x6c0132b7903f05dd24cebace5639fd87c3c34bd33a985bf8cde048987e5c13df
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953899
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953899
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/137c3ed1-9432-4200-a65d-833e608ae934.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/137c3ed1-9432-4200-a65d-833e608ae934.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/137c3ed1-9432-4200-a65d-833e608ae934
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T06:37:25Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x6c0132b7903f05dd24cebace5639fd87c3c34bd33a985bf8cde048987e5c13df","name":"Rostislav Vacek","registered_at":"2026-06-15T20:12:50Z","symbol":"NIM0819169","token_address":"0xda1659a9f47545ee6e925b794096258483ddfc4a","type":"artist","uuid":"137c3ed1-9432-4200-a65d-833e608ae934"}
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 0x6c0132b7903f05dd24cebace5639fd87c3c34bd33a985bf8cde048987e5c13df. Chain 2 (Bitcoin): anchored in block 953899 (2026-06-16T06:37:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/137c3ed1-9432-4200-a65d-833e608ae934.json and https://artists.proofprofile.net/proofs/artist/137c3ed1-9432-4200-a65d-833e608ae934.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-16T06:37:25Z
  text: {"copyright_id":"0x6c0132b7903f05dd24cebace5639fd87c3c34bd33a985bf8cde048987e5c13df","name":"Rostislav Vacek","registered_at":"2026-06-15T20:12:50Z","symbol":"NIM0819169","token_address":"0xda1659a9f47545ee6e925b794096258483ddfc4a","type":"artist","uuid":"137c3ed1-9432-4200-a65d-833e608ae934"}
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