Marco Spiezia
type: MusicGroup
genre: retro soul
popularity: 5
followers: 350
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x92d638e0817bbb1691879380139d010a5fbdc34754659a4d6fe909887cbec0fb
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954065
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954065
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/4fe402fc-d8d3-485f-9cbe-f608ef6450fd.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/4fe402fc-d8d3-485f-9cbe-f608ef6450fd.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/4fe402fc-d8d3-485f-9cbe-f608ef6450fd
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:10:43Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x92d638e0817bbb1691879380139d010a5fbdc34754659a4d6fe909887cbec0fb","name":"Marco Spiezia","registered_at":"2026-06-16T17:23:57Z","symbol":"NIM1122570","token_address":"0xd5c00611cd69b13dab98000eb40935e111cc934e","type":"artist","uuid":"4fe402fc-d8d3-485f-9cbe-f608ef6450fd"}
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 0x92d638e0817bbb1691879380139d010a5fbdc34754659a4d6fe909887cbec0fb. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4fe402fc-d8d3-485f-9cbe-f608ef6450fd.json and https://artists.proofprofile.net/proofs/artist/4fe402fc-d8d3-485f-9cbe-f608ef6450fd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:10:43Z
  text: {"copyright_id":"0x92d638e0817bbb1691879380139d010a5fbdc34754659a4d6fe909887cbec0fb","name":"Marco Spiezia","registered_at":"2026-06-16T17:23:57Z","symbol":"NIM1122570","token_address":"0xd5c00611cd69b13dab98000eb40935e111cc934e","type":"artist","uuid":"4fe402fc-d8d3-485f-9cbe-f608ef6450fd"}
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