Katherine Heigl
type: MusicGroup
description: Katherine Heigl ( ; born November 24, 1978) is an American actress and model. She portrayed Dr. Izzie Stevens on the ABC television medical drama Grey's Anatomy from 2005 to 2010, a role that brought
popularity: 3
followers: 84
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x4a2b463aa99afce7260d39bf96ddb77ea5f5dd6bdbc87293af91c89a9835c1c4
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954549
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954549
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a9a9cd11-baed-4bb4-9d51-7dce0e459dc8.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a9a9cd11-baed-4bb4-9d51-7dce0e459dc8.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/a9a9cd11-baed-4bb4-9d51-7dce0e459dc8
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T10:56:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x4a2b463aa99afce7260d39bf96ddb77ea5f5dd6bdbc87293af91c89a9835c1c4","name":"Katherine Heigl","registered_at":"2026-06-20T09:14:44Z","symbol":"NIM1575675","token_address":"0xb2393f4182ced748d33ba99e48ea59d7b34a9d84","type":"artist","uuid":"a9a9cd11-baed-4bb4-9d51-7dce0e459dc8"}
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 0x4a2b463aa99afce7260d39bf96ddb77ea5f5dd6bdbc87293af91c89a9835c1c4. Chain 2 (Bitcoin): anchored in block 954549 (2026-06-20T10:56:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a9a9cd11-baed-4bb4-9d51-7dce0e459dc8.json and https://artists.proofprofile.net/proofs/artist/a9a9cd11-baed-4bb4-9d51-7dce0e459dc8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T10:56:20Z
  text: {"copyright_id":"0x4a2b463aa99afce7260d39bf96ddb77ea5f5dd6bdbc87293af91c89a9835c1c4","name":"Katherine Heigl","registered_at":"2026-06-20T09:14:44Z","symbol":"NIM1575675","token_address":"0xb2393f4182ced748d33ba99e48ea59d7b34a9d84","type":"artist","uuid":"a9a9cd11-baed-4bb4-9d51-7dce0e459dc8"}
album: Entropy
  type: MusicAlbum
  date published: 2022-05-12