Pierre-Marie Chemla
type: MusicGroup
genre: medieval
popularity: 2
followers: 34
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x551bb81f62f4bd781cbfb4525607c3e2648ba5cc0ea194b05ce173e29848a9e6
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954667
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954667
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/d7f67eba-eedb-43d3-9705-e304347709ca.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/d7f67eba-eedb-43d3-9705-e304347709ca.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/d7f67eba-eedb-43d3-9705-e304347709ca
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T07:29:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x551bb81f62f4bd781cbfb4525607c3e2648ba5cc0ea194b05ce173e29848a9e6","name":"Pierre-Marie Chemla","registered_at":"2026-06-21T03:44:19Z","symbol":"NIM1805637","token_address":"0xb2192f9cdc0765e222c2c89adf477805dd56d2c3","type":"artist","uuid":"d7f67eba-eedb-43d3-9705-e304347709ca"}
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 0x551bb81f62f4bd781cbfb4525607c3e2648ba5cc0ea194b05ce173e29848a9e6. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d7f67eba-eedb-43d3-9705-e304347709ca.json and https://artists.proofprofile.net/proofs/artist/d7f67eba-eedb-43d3-9705-e304347709ca.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T07:29:20Z
  text: {"copyright_id":"0x551bb81f62f4bd781cbfb4525607c3e2648ba5cc0ea194b05ce173e29848a9e6","name":"Pierre-Marie Chemla","registered_at":"2026-06-21T03:44:19Z","symbol":"NIM1805637","token_address":"0xb2192f9cdc0765e222c2c89adf477805dd56d2c3","type":"artist","uuid":"d7f67eba-eedb-43d3-9705-e304347709ca"}