Rudolf Leopold
type: MusicGroup
genre: chamber music
description: Rudolf Leopold (March 1, 1925 – June 29, 2010) was an Austrian art collector whose collection, comprising more than 5,000 works of art, was established as a private foundation in 1994. The foundation
popularity: 2
followers: 22
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xf504790ba3f691d2343a6ea048e7cb8fc96c7b01bf017082e67b85575ff3a2a5
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953972
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953972
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2a319025-c07f-4db3-b67d-c71ef5293b43.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2a319025-c07f-4db3-b67d-c71ef5293b43.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/2a319025-c07f-4db3-b67d-c71ef5293b43
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T16:31:10Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xf504790ba3f691d2343a6ea048e7cb8fc96c7b01bf017082e67b85575ff3a2a5","name":"Rudolf Leopold","registered_at":"2026-06-16T04:31:34Z","symbol":"NIM0938226","token_address":"0xc6f6533b8e81e79a0e93dc397e6646b29f89ee34","type":"artist","uuid":"2a319025-c07f-4db3-b67d-c71ef5293b43"}
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 0xf504790ba3f691d2343a6ea048e7cb8fc96c7b01bf017082e67b85575ff3a2a5. Chain 2 (Bitcoin): anchored in block 953973 (2026-06-16T16:37:07Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2a319025-c07f-4db3-b67d-c71ef5293b43.json and https://artists.proofprofile.net/proofs/artist/2a319025-c07f-4db3-b67d-c71ef5293b43.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T16:37:07Z
  text: {"copyright_id":"0xf504790ba3f691d2343a6ea048e7cb8fc96c7b01bf017082e67b85575ff3a2a5","name":"Rudolf Leopold","registered_at":"2026-06-16T04:31:34Z","symbol":"NIM0938226","token_address":"0xc6f6533b8e81e79a0e93dc397e6646b29f89ee34","type":"artist","uuid":"2a319025-c07f-4db3-b67d-c71ef5293b43"}