Tamar Halpern
type: MusicGroup
description: Tamar Halpern is a writer and director living in Los Angeles. She holds an M.F.A. degree from the University of Southern California's School of Cinematic Arts. Career Halpern has written and directe
popularity: 3
followers: 9
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x07f246ead324a6850e32838bc542227b2b7062a30eaa19aa68f348f24658f02d
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954031
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954031
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3b0dafc5-5f4c-494f-9fe7-67918ffd4efc.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3b0dafc5-5f4c-494f-9fe7-67918ffd4efc.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/3b0dafc5-5f4c-494f-9fe7-67918ffd4efc
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T01:43:23Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x07f246ead324a6850e32838bc542227b2b7062a30eaa19aa68f348f24658f02d","name":"Tamar Halpern","registered_at":"2026-06-16T10:09:41Z","symbol":"NIM1018969","token_address":"0xb550c34f0a1a3976406290dc8f9c2d18d83c28b2","type":"artist","uuid":"3b0dafc5-5f4c-494f-9fe7-67918ffd4efc"}
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 0x07f246ead324a6850e32838bc542227b2b7062a30eaa19aa68f348f24658f02d. Chain 2 (Bitcoin): anchored in block 954031 (2026-06-17T01:43:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3b0dafc5-5f4c-494f-9fe7-67918ffd4efc.json and https://artists.proofprofile.net/proofs/artist/3b0dafc5-5f4c-494f-9fe7-67918ffd4efc.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-17T01:43:23Z
  text: {"copyright_id":"0x07f246ead324a6850e32838bc542227b2b7062a30eaa19aa68f348f24658f02d","name":"Tamar Halpern","registered_at":"2026-06-16T10:09:41Z","symbol":"NIM1018969","token_address":"0xb550c34f0a1a3976406290dc8f9c2d18d83c28b2","type":"artist","uuid":"3b0dafc5-5f4c-494f-9fe7-67918ffd4efc"}
album: California Girl (Ungekürzt)
  type: MusicAlbum
  date published: 2023-09-27