DANIEL DEFFAYET
type: MusicGroup
description: Daniel Deffayet (May 23, 1922 – December 27, 2002) was a French classical saxophonist. He was the professor of saxophone at the Conservatoire de Paris where he succeeded Marcel Mule after Mule's retir
popularity: 3
followers: 5
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x7f61ae38b1381aa8ebc65dc2513787b24a57032f91d22f4e7d89f0fcb1d38b10
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953982
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953982
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2cb52ad9-2c6a-4b19-b558-2bfdca934829.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2cb52ad9-2c6a-4b19-b558-2bfdca934829.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/2cb52ad9-2c6a-4b19-b558-2bfdca934829
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T17:42:23Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x7f61ae38b1381aa8ebc65dc2513787b24a57032f91d22f4e7d89f0fcb1d38b10","name":"DANIEL DEFFAYET","registered_at":"2026-06-16T05:11:08Z","symbol":"NIM0947679","token_address":"0xb1689bfe37e2caf65c3fe11ee0916189f9705d17","type":"artist","uuid":"2cb52ad9-2c6a-4b19-b558-2bfdca934829"}
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 0x7f61ae38b1381aa8ebc65dc2513787b24a57032f91d22f4e7d89f0fcb1d38b10. Chain 2 (Bitcoin): anchored in block 953982 (2026-06-16T17:42:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2cb52ad9-2c6a-4b19-b558-2bfdca934829.json and https://artists.proofprofile.net/proofs/artist/2cb52ad9-2c6a-4b19-b558-2bfdca934829.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T17:42:23Z
  text: {"copyright_id":"0x7f61ae38b1381aa8ebc65dc2513787b24a57032f91d22f4e7d89f0fcb1d38b10","name":"DANIEL DEFFAYET","registered_at":"2026-06-16T05:11:08Z","symbol":"NIM0947679","token_address":"0xb1689bfe37e2caf65c3fe11ee0916189f9705d17","type":"artist","uuid":"2cb52ad9-2c6a-4b19-b558-2bfdca934829"}