Reuven Shefer
type: MusicGroup
description: Reuven Shefer (; 7 June 1925 – 22 March 2011) was an Israeli theater and film actor.Reuven Shefer’s filmography (in Hebrew) Biography Shefer was born in Tel Aviv.Actor Reuven Sheffer dies at 86. Jeru
popularity: 18
followers: 130
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x8349e532dcf64aa2920fed7a261acf9ddd9c64dc63514078ad258a31792bae5e
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953612
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953612
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1697b244-2487-49c3-9a3c-ab544ce848a0.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1697b244-2487-49c3-9a3c-ab544ce848a0.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/1697b244-2487-49c3-9a3c-ab544ce848a0
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T08:22:11Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x8349e532dcf64aa2920fed7a261acf9ddd9c64dc63514078ad258a31792bae5e","name":"Reuven Shefer","registered_at":"2026-06-14T06:46:06Z","symbol":"NIM0371355","token_address":"0xa87b231aa8c247cc922fd6f99decc7fe779573ec","type":"artist","uuid":"1697b244-2487-49c3-9a3c-ab544ce848a0"}
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 0x8349e532dcf64aa2920fed7a261acf9ddd9c64dc63514078ad258a31792bae5e. Chain 2 (Bitcoin): anchored in block 953612 (2026-06-14T08:22:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1697b244-2487-49c3-9a3c-ab544ce848a0.json and https://artists.proofprofile.net/proofs/artist/1697b244-2487-49c3-9a3c-ab544ce848a0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T08:22:11Z
  text: {"copyright_id":"0x8349e532dcf64aa2920fed7a261acf9ddd9c64dc63514078ad258a31792bae5e","name":"Reuven Shefer","registered_at":"2026-06-14T06:46:06Z","symbol":"NIM0371355","token_address":"0xa87b231aa8c247cc922fd6f99decc7fe779573ec","type":"artist","uuid":"1697b244-2487-49c3-9a3c-ab544ce848a0"}