Fernand Oubradous
type: MusicGroup
description: Fernand Oubradous (12 February 1903 – 6 January 1986) was a French bassoonist, conductor and composer. Born in Paris, he studied in his native city with André Bloch. He composed a series of tutors cal
popularity: 4
followers: 33
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x3cb910c95e347a23c6e60abdef3e0e236c7123998b913f61bfb570d200d7a178
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954533
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954533
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a6713662-0678-45d7-9be5-fbf2f4708fc5.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a6713662-0678-45d7-9be5-fbf2f4708fc5.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/a6713662-0678-45d7-9be5-fbf2f4708fc5
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T08:57:02Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x3cb910c95e347a23c6e60abdef3e0e236c7123998b913f61bfb570d200d7a178","name":"Fernand Oubradous","registered_at":"2026-06-20T07:53:17Z","symbol":"NIM1557323","token_address":"0xed055f82b6da80dcf46a006729941ce00952d56c","type":"artist","uuid":"a6713662-0678-45d7-9be5-fbf2f4708fc5"}
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 0x3cb910c95e347a23c6e60abdef3e0e236c7123998b913f61bfb570d200d7a178. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a6713662-0678-45d7-9be5-fbf2f4708fc5.json and https://artists.proofprofile.net/proofs/artist/a6713662-0678-45d7-9be5-fbf2f4708fc5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T08:57:02Z
  text: {"copyright_id":"0x3cb910c95e347a23c6e60abdef3e0e236c7123998b913f61bfb570d200d7a178","name":"Fernand Oubradous","registered_at":"2026-06-20T07:53:17Z","symbol":"NIM1557323","token_address":"0xed055f82b6da80dcf46a006729941ce00952d56c","type":"artist","uuid":"a6713662-0678-45d7-9be5-fbf2f4708fc5"}