Stefan Hirsch
type: MusicGroup
description: Stefan Hirsch (January 2, 1899 – September 28, 1964) was an American artist. Many of his paintings have the hard edges, smooth surfaces, and simplified forms of the precisionists, and their typical su
popularity: 8
followers: 333
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x51618bb3920a954c6385d1c39edf15fcf09dac77cf71aa2f584055bd57a07934
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953997
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953997
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1af61e78-76c1-4376-9549-9578dd969d60.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1af61e78-76c1-4376-9549-9578dd969d60.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/1af61e78-76c1-4376-9549-9578dd969d60
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T20:07:57Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x51618bb3920a954c6385d1c39edf15fcf09dac77cf71aa2f584055bd57a07934","name":"Stefan Hirsch","registered_at":"2026-06-15T22:50:00Z","symbol":"NIM0856648","token_address":"0x639c203baf1bcc5af2aaa827b661e664555fd742","type":"artist","uuid":"1af61e78-76c1-4376-9549-9578dd969d60"}
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 0x51618bb3920a954c6385d1c39edf15fcf09dac77cf71aa2f584055bd57a07934. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1af61e78-76c1-4376-9549-9578dd969d60.json and https://artists.proofprofile.net/proofs/artist/1af61e78-76c1-4376-9549-9578dd969d60.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T20:07:57Z
  text: {"copyright_id":"0x51618bb3920a954c6385d1c39edf15fcf09dac77cf71aa2f584055bd57a07934","name":"Stefan Hirsch","registered_at":"2026-06-15T22:50:00Z","symbol":"NIM0856648","token_address":"0x639c203baf1bcc5af2aaa827b661e664555fd742","type":"artist","uuid":"1af61e78-76c1-4376-9549-9578dd969d60"}
album: Reads
  type: MusicAlbum
  date published: 2024-08-04