Cadu Sperdianni
type: MusicGroup
popularity: 2
followers: 1028
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xbb6b39460990c484dec344ac06f13b8f28d120dc9853d59df6c11157701439dc
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953864
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953864
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/04a64ab3-16b7-412a-b3c5-e361d8bb794d.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/04a64ab3-16b7-412a-b3c5-e361d8bb794d.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/04a64ab3-16b7-412a-b3c5-e361d8bb794d
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T00:30:31Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xbb6b39460990c484dec344ac06f13b8f28d120dc9853d59df6c11157701439dc","name":"Cadu Sperdianni","registered_at":"2026-06-15T15:14:39Z","symbol":"NIM0748017","token_address":"0x7f0b0580b82280a048f5c26d2d3a0f6089eade54","type":"artist","uuid":"04a64ab3-16b7-412a-b3c5-e361d8bb794d"}
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 0xbb6b39460990c484dec344ac06f13b8f28d120dc9853d59df6c11157701439dc. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/04a64ab3-16b7-412a-b3c5-e361d8bb794d.json and https://artists.proofprofile.net/proofs/artist/04a64ab3-16b7-412a-b3c5-e361d8bb794d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T07:53:13Z
  text: {"copyright_id":"0xbb6b39460990c484dec344ac06f13b8f28d120dc9853d59df6c11157701439dc","name":"Cadu Sperdianni","registered_at":"2026-06-15T15:14:39Z","symbol":"NIM0748017","token_address":"0x7f0b0580b82280a048f5c26d2d3a0f6089eade54","type":"artist","uuid":"04a64ab3-16b7-412a-b3c5-e361d8bb794d"}
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