Arnold van Mill
type: MusicGroup
genre: opera
description: Arnold van Mill (26 March 1921 in Schiedam – 5 October 1996 in Hamburg) was a Dutch bass opera singer. Debut He made his debut in 1941 at the Circustheater in The Hague as Wagner in the opera Faust o
popularity: 9
followers: 73
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xffc513ce6d6d7cc5546b5f9d021abce9b6484a70a237431036555015b5fad122
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954066
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954066
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/5a4a7605-8d29-4ada-88b2-689b0b68f6ab.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/5a4a7605-8d29-4ada-88b2-689b0b68f6ab.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/5a4a7605-8d29-4ada-88b2-689b0b68f6ab
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xffc513ce6d6d7cc5546b5f9d021abce9b6484a70a237431036555015b5fad122","name":"Arnold van Mill","registered_at":"2026-06-16T20:58:57Z","symbol":"NIM1173875","token_address":"0xfcb1f9286357d75a3d5aecf06aa5dc6638c7b2f1","type":"artist","uuid":"5a4a7605-8d29-4ada-88b2-689b0b68f6ab"}
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 0xffc513ce6d6d7cc5546b5f9d021abce9b6484a70a237431036555015b5fad122. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5a4a7605-8d29-4ada-88b2-689b0b68f6ab.json and https://artists.proofprofile.net/proofs/artist/5a4a7605-8d29-4ada-88b2-689b0b68f6ab.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0xffc513ce6d6d7cc5546b5f9d021abce9b6484a70a237431036555015b5fad122","name":"Arnold van Mill","registered_at":"2026-06-16T20:58:57Z","symbol":"NIM1173875","token_address":"0xfcb1f9286357d75a3d5aecf06aa5dc6638c7b2f1","type":"artist","uuid":"5a4a7605-8d29-4ada-88b2-689b0b68f6ab"}
album: Favourite Opera Arias
  type: MusicAlbum
  date published: 2014-01-01