Sestry Havelkovy
type: MusicGroup
genre: swing music
popularity: 2
followers: 73
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x3d03812bbcae0be3425533fd9b17ecd32338e58f360120cf072ab8300e5afa3e
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953875
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953875
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/088defe9-c720-4bb9-b9dc-1c4b3c5cc5ce.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/088defe9-c720-4bb9-b9dc-1c4b3c5cc5ce.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/088defe9-c720-4bb9-b9dc-1c4b3c5cc5ce
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T02:12:46Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x3d03812bbcae0be3425533fd9b17ecd32338e58f360120cf072ab8300e5afa3e","name":"Sestry Havelkovy","registered_at":"2026-06-15T16:29:51Z","symbol":"NIM0765981","token_address":"0xb4d1a148d95ffa3064e9e40cab35c1f8c488035b","type":"artist","uuid":"088defe9-c720-4bb9-b9dc-1c4b3c5cc5ce"}
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 0x3d03812bbcae0be3425533fd9b17ecd32338e58f360120cf072ab8300e5afa3e. Chain 2 (Bitcoin): anchored in block 953875 (2026-06-16T02:12:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/088defe9-c720-4bb9-b9dc-1c4b3c5cc5ce.json and https://artists.proofprofile.net/proofs/artist/088defe9-c720-4bb9-b9dc-1c4b3c5cc5ce.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T02:12:46Z
  text: {"copyright_id":"0x3d03812bbcae0be3425533fd9b17ecd32338e58f360120cf072ab8300e5afa3e","name":"Sestry Havelkovy","registered_at":"2026-06-15T16:29:51Z","symbol":"NIM0765981","token_address":"0xb4d1a148d95ffa3064e9e40cab35c1f8c488035b","type":"artist","uuid":"088defe9-c720-4bb9-b9dc-1c4b3c5cc5ce"}