André Ducret
type: MusicGroup
description: André Ducret (4 June 1945 – 1 February 2025) was a Swiss singer, composer, choir conductor and teacher. Life and career Born in Fribourg on 4 June 1945, Ducret was gifted a tenor voice and performed
popularity: 3
followers: 151
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xbc5da39e3eeb86ecae75e05066a22f897142acec4968ff9631624dea68f31893
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954513
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954513
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9d328d51-bb70-454e-a483-a5e483777d43.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9d328d51-bb70-454e-a483-a5e483777d43.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/9d328d51-bb70-454e-a483-a5e483777d43
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T06:31:18Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xbc5da39e3eeb86ecae75e05066a22f897142acec4968ff9631624dea68f31893","name":"André Ducret","registered_at":"2026-06-20T04:44:48Z","symbol":"NIM1514914","token_address":"0x6f78c85338fcb0fc9f1e5c6ebb380e7d598ef1de","type":"artist","uuid":"9d328d51-bb70-454e-a483-a5e483777d43"}
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 0xbc5da39e3eeb86ecae75e05066a22f897142acec4968ff9631624dea68f31893. Chain 2 (Bitcoin): anchored in block 954513 (2026-06-20T06:31:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9d328d51-bb70-454e-a483-a5e483777d43.json and https://artists.proofprofile.net/proofs/artist/9d328d51-bb70-454e-a483-a5e483777d43.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T06:31:18Z
  text: {"copyright_id":"0xbc5da39e3eeb86ecae75e05066a22f897142acec4968ff9631624dea68f31893","name":"André Ducret","registered_at":"2026-06-20T04:44:48Z","symbol":"NIM1514914","token_address":"0x6f78c85338fcb0fc9f1e5c6ebb380e7d598ef1de","type":"artist","uuid":"9d328d51-bb70-454e-a483-a5e483777d43"}
album: Chants du soir
  type: MusicAlbum
  date published: 1997-12-09
album: Chansons du matin
  type: MusicAlbum
  date published: 1997-12-09
album: Caramel
  type: MusicAlbum
  date published: 2007-09-24
album: André Ducret: La Marche des Rois
  type: MusicAlbum
  date published: 2023-01-06