Warren Cook
type: MusicGroup
genre: choral
description: Warren Cook (May 23, 1878 – May 2, 1939) was an American film actor of the silent era. Cook was born in Boston, Massachusetts. In 1901, he appeared in The Shaughraun at the Castle Square Theatre in Bo
popularity: 16
followers: 26
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x3a2dd3aa11903a8b10843c8569360ec688f49bf679c5848cfcae78264c67c623
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953743
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953743
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a2ccde05-c771-4dc2-91aa-9875f8a2e3a8.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a2ccde05-c771-4dc2-91aa-9875f8a2e3a8.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/a2ccde05-c771-4dc2-91aa-9875f8a2e3a8
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T04:52:01Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x3a2dd3aa11903a8b10843c8569360ec688f49bf679c5848cfcae78264c67c623","name":"Warren Cook","registered_at":"2026-06-14T21:37:48Z","symbol":"NIM0584032","token_address":"0x9acd2063cb8573ac9ec0560e681018a05ec57320","type":"artist","uuid":"a2ccde05-c771-4dc2-91aa-9875f8a2e3a8"}
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 0x3a2dd3aa11903a8b10843c8569360ec688f49bf679c5848cfcae78264c67c623. Chain 2 (Bitcoin): anchored in block 953743 (2026-06-15T04:52:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a2ccde05-c771-4dc2-91aa-9875f8a2e3a8.json and https://artists.proofprofile.net/proofs/artist/a2ccde05-c771-4dc2-91aa-9875f8a2e3a8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T04:52:01Z
  text: {"copyright_id":"0x3a2dd3aa11903a8b10843c8569360ec688f49bf679c5848cfcae78264c67c623","name":"Warren Cook","registered_at":"2026-06-14T21:37:48Z","symbol":"NIM0584032","token_address":"0x9acd2063cb8573ac9ec0560e681018a05ec57320","type":"artist","uuid":"a2ccde05-c771-4dc2-91aa-9875f8a2e3a8"}