AC Sparta Praha
type: MusicGroup
popularity: 20
followers: 5538
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xe4c6e4b9cff07b773a5dc53cabd45eb7ccd26a7dd7ccdbe1e4492148f14d5dba
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953762
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953762
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b7423c9d-5697-47a6-8013-888d866bd884.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b7423c9d-5697-47a6-8013-888d866bd884.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/b7423c9d-5697-47a6-8013-888d866bd884
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T08:21:23Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xe4c6e4b9cff07b773a5dc53cabd45eb7ccd26a7dd7ccdbe1e4492148f14d5dba","name":"AC Sparta Praha","registered_at":"2026-06-14T23:49:33Z","symbol":"NIM0615478","token_address":"0x2456c1fe7c0b70ab18d63251c2d6b239a879e2dd","type":"artist","uuid":"b7423c9d-5697-47a6-8013-888d866bd884"}
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 0xe4c6e4b9cff07b773a5dc53cabd45eb7ccd26a7dd7ccdbe1e4492148f14d5dba. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b7423c9d-5697-47a6-8013-888d866bd884.json and https://artists.proofprofile.net/proofs/artist/b7423c9d-5697-47a6-8013-888d866bd884.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T08:21:23Z
  text: {"copyright_id":"0xe4c6e4b9cff07b773a5dc53cabd45eb7ccd26a7dd7ccdbe1e4492148f14d5dba","name":"AC Sparta Praha","registered_at":"2026-06-14T23:49:33Z","symbol":"NIM0615478","token_address":"0x2456c1fe7c0b70ab18d63251c2d6b239a879e2dd","type":"artist","uuid":"b7423c9d-5697-47a6-8013-888d866bd884"}
album: Na srdci S
  type: MusicAlbum
  date published: 2019-09-17
album: Zpívej, kdo jsi sparťanem
  type: MusicAlbum
  date published: 2023-11-16