Helen Chadwick
type: MusicGroup
description: Helen Chadwick (18 May 1953 – 15 March 1996) was a British sculptor, photographer and installation artist. In 1987, she became one of the first women artists to be nominated for the Turner Prize.Tate
popularity: 4
followers: 206
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x77a2ecf52aef0f71d1734f2bbccd447931b7602260def1bdd0a1665439a0ad9f
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954693
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954693
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e58b310b-8997-43e1-ba4a-a860c1c27a8b.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e58b310b-8997-43e1-ba4a-a860c1c27a8b.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/e58b310b-8997-43e1-ba4a-a860c1c27a8b
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T11:50:32Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x77a2ecf52aef0f71d1734f2bbccd447931b7602260def1bdd0a1665439a0ad9f","name":"Helen Chadwick","registered_at":"2026-06-21T08:10:55Z","symbol":"NIM1871084","token_address":"0xe41e63f91797c0463197598bf693216c718bd9de","type":"artist","uuid":"e58b310b-8997-43e1-ba4a-a860c1c27a8b"}
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 0x77a2ecf52aef0f71d1734f2bbccd447931b7602260def1bdd0a1665439a0ad9f. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e58b310b-8997-43e1-ba4a-a860c1c27a8b.json and https://artists.proofprofile.net/proofs/artist/e58b310b-8997-43e1-ba4a-a860c1c27a8b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T11:50:32Z
  text: {"copyright_id":"0x77a2ecf52aef0f71d1734f2bbccd447931b7602260def1bdd0a1665439a0ad9f","name":"Helen Chadwick","registered_at":"2026-06-21T08:10:55Z","symbol":"NIM1871084","token_address":"0xe41e63f91797c0463197598bf693216c718bd9de","type":"artist","uuid":"e58b310b-8997-43e1-ba4a-a860c1c27a8b"}
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