Pietro Metastasio
type: MusicGroup
genre: chamber music
description: Pietro Antonio Domenico Trapassi (3 January 1698 – 12 April 1782), better known by his pseudonym of Pietro Metastasio (), was an Italian poet and librettist, considered the most important writer of op
popularity: 2
followers: 216
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x6547d4b6723b69d038501cfafbe91159fa544320270bea6a4046dde546f364de
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954549
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954549
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a8b41861-9df6-49e0-b129-13db59a378fd.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a8b41861-9df6-49e0-b129-13db59a378fd.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/a8b41861-9df6-49e0-b129-13db59a378fd
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T10:56:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x6547d4b6723b69d038501cfafbe91159fa544320270bea6a4046dde546f364de","name":"Pietro Metastasio","registered_at":"2026-06-20T08:35:15Z","symbol":"NIM1567446","token_address":"0x15a805d7695bc12358e10d9abaea777ec2a76035","type":"artist","uuid":"a8b41861-9df6-49e0-b129-13db59a378fd"}
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 0x6547d4b6723b69d038501cfafbe91159fa544320270bea6a4046dde546f364de. Chain 2 (Bitcoin): anchored in block 954555 (2026-06-20T12:10:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a8b41861-9df6-49e0-b129-13db59a378fd.json and https://artists.proofprofile.net/proofs/artist/a8b41861-9df6-49e0-b129-13db59a378fd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T12:10:20Z
  text: {"copyright_id":"0x6547d4b6723b69d038501cfafbe91159fa544320270bea6a4046dde546f364de","name":"Pietro Metastasio","registered_at":"2026-06-20T08:35:15Z","symbol":"NIM1567446","token_address":"0x15a805d7695bc12358e10d9abaea777ec2a76035","type":"artist","uuid":"a8b41861-9df6-49e0-b129-13db59a378fd"}