Jack Martin Händler
type: MusicGroup
description: Jack Martin Händler (30 August 1947 – 24 May 2023) was a Slovak conductor and violinist. Biography Jack Martin Händler was born in Bratislava in 1947. He studied at the Conservatory of Bratislava, an
popularity: 2
followers: 10
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x24fce50423da303ab9821a080360a65a94d08b6148d15e6107bad14a727eb202
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954580
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954580
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b6c6d5f0-713d-464c-a485-a27cf7d73535.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b6c6d5f0-713d-464c-a485-a27cf7d73535.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/b6c6d5f0-713d-464c-a485-a27cf7d73535
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T17:48:00Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x24fce50423da303ab9821a080360a65a94d08b6148d15e6107bad14a727eb202","name":"Jack Martin Händler","registered_at":"2026-06-20T14:57:08Z","symbol":"NIM1635793","token_address":"0x6c06ad352cc4b800fc5fbee89da6cb0a6129546f","type":"artist","uuid":"b6c6d5f0-713d-464c-a485-a27cf7d73535"}
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 0x24fce50423da303ab9821a080360a65a94d08b6148d15e6107bad14a727eb202. Chain 2 (Bitcoin): anchored in block 954580 (2026-06-20T17:48:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b6c6d5f0-713d-464c-a485-a27cf7d73535.json and https://artists.proofprofile.net/proofs/artist/b6c6d5f0-713d-464c-a485-a27cf7d73535.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T17:48:00Z
  text: {"copyright_id":"0x24fce50423da303ab9821a080360a65a94d08b6148d15e6107bad14a727eb202","name":"Jack Martin Händler","registered_at":"2026-06-20T14:57:08Z","symbol":"NIM1635793","token_address":"0x6c06ad352cc4b800fc5fbee89da6cb0a6129546f","type":"artist","uuid":"b6c6d5f0-713d-464c-a485-a27cf7d73535"}