Walter Sittler
type: MusicGroup
description: Walter Sittler is an American-German actor, producer, and writer. Early life thumb|Deutscher Fernsehpreis 2012 – Aglaia Szyszkowitz and Walter Sittler at the Deutscher Fernsehpreis 2012 Sittler was
popularity: 12
followers: 44
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xf8c815fb9887d8f77a9965a49b684cc2c75f30c68357293d3bc8e0b24dff1a5a
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953758
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953758
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b3f8bf74-7496-4e54-8337-05bbd06d322a.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b3f8bf74-7496-4e54-8337-05bbd06d322a.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/b3f8bf74-7496-4e54-8337-05bbd06d322a
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T07:48:25Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xf8c815fb9887d8f77a9965a49b684cc2c75f30c68357293d3bc8e0b24dff1a5a","name":"Walter Sittler","registered_at":"2026-06-14T23:32:35Z","symbol":"NIM0611426","token_address":"0x30d993195d44ee58119683702f9475612c2789bb","type":"artist","uuid":"b3f8bf74-7496-4e54-8337-05bbd06d322a"}
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 0xf8c815fb9887d8f77a9965a49b684cc2c75f30c68357293d3bc8e0b24dff1a5a. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b3f8bf74-7496-4e54-8337-05bbd06d322a.json and https://artists.proofprofile.net/proofs/artist/b3f8bf74-7496-4e54-8337-05bbd06d322a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T07:48:25Z
  text: {"copyright_id":"0xf8c815fb9887d8f77a9965a49b684cc2c75f30c68357293d3bc8e0b24dff1a5a","name":"Walter Sittler","registered_at":"2026-06-14T23:32:35Z","symbol":"NIM0611426","token_address":"0x30d993195d44ee58119683702f9475612c2789bb","type":"artist","uuid":"b3f8bf74-7496-4e54-8337-05bbd06d322a"}