Emil Ludwig
type: MusicGroup
description: Emil Ludwig (25 January 1881 – 17 September 1948) was a German-Swiss author, known for his biographies and study of historical "greats."An Interview with the German Author Emil Ludwig Date of Intervie
popularity: 8
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x48a1cda93dfd7d70fba0e68dd985ed74216765fe105d4d8ef67faabb67bd6fd8
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954500
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954500
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9b18b180-7766-4bf7-8fbb-1a6658faaa9d.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9b18b180-7766-4bf7-8fbb-1a6658faaa9d.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/9b18b180-7766-4bf7-8fbb-1a6658faaa9d
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T04:47:29Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x48a1cda93dfd7d70fba0e68dd985ed74216765fe105d4d8ef67faabb67bd6fd8","name":"Emil Ludwig","registered_at":"2026-06-20T03:37:18Z","symbol":"NIM1500329","token_address":"0xbbacc105c4a85bf6ab6396273756beaad3a25597","type":"artist","uuid":"9b18b180-7766-4bf7-8fbb-1a6658faaa9d"}
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 0x48a1cda93dfd7d70fba0e68dd985ed74216765fe105d4d8ef67faabb67bd6fd8. Chain 2 (Bitcoin): anchored in block 954500 (2026-06-20T04:47:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9b18b180-7766-4bf7-8fbb-1a6658faaa9d.json and https://artists.proofprofile.net/proofs/artist/9b18b180-7766-4bf7-8fbb-1a6658faaa9d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T04:47:29Z
  text: {"copyright_id":"0x48a1cda93dfd7d70fba0e68dd985ed74216765fe105d4d8ef67faabb67bd6fd8","name":"Emil Ludwig","registered_at":"2026-06-20T03:37:18Z","symbol":"NIM1500329","token_address":"0xbbacc105c4a85bf6ab6396273756beaad3a25597","type":"artist","uuid":"9b18b180-7766-4bf7-8fbb-1a6658faaa9d"}