Joan Davis
type: MusicGroup
description: Josephine Madonna Davis (June 29, 1912 – May 23, 1961), known professionally as Joan Davis, was an American comedic actress whose career spanned vaudeville, film, radio, and television. Remembered bes
popularity: 12
followers: 163
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x7a0aec6b906c7a581ce1f803e88b906fe0ff24c20689a03ad1a92c1f911d813d
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953750
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953750
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a6ec8adc-fb7e-4336-8332-8eaaee9ecdee.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a6ec8adc-fb7e-4336-8332-8eaaee9ecdee.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/a6ec8adc-fb7e-4336-8332-8eaaee9ecdee
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T06:12:23Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x7a0aec6b906c7a581ce1f803e88b906fe0ff24c20689a03ad1a92c1f911d813d","name":"Joan Davis","registered_at":"2026-06-14T22:04:00Z","symbol":"NIM0590290","token_address":"0x3087f6516370329df866add66aa88181a9f81383","type":"artist","uuid":"a6ec8adc-fb7e-4336-8332-8eaaee9ecdee"}
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 0x7a0aec6b906c7a581ce1f803e88b906fe0ff24c20689a03ad1a92c1f911d813d. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a6ec8adc-fb7e-4336-8332-8eaaee9ecdee.json and https://artists.proofprofile.net/proofs/artist/a6ec8adc-fb7e-4336-8332-8eaaee9ecdee.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T06:12:23Z
  text: {"copyright_id":"0x7a0aec6b906c7a581ce1f803e88b906fe0ff24c20689a03ad1a92c1f911d813d","name":"Joan Davis","registered_at":"2026-06-14T22:04:00Z","symbol":"NIM0590290","token_address":"0x3087f6516370329df866add66aa88181a9f81383","type":"artist","uuid":"a6ec8adc-fb7e-4336-8332-8eaaee9ecdee"}
album: Newspaper Man
  type: MusicAlbum
  date published: 2016-04-23
album: River
  type: MusicAlbum
  date published: 2016-04-29
album: Promiseland
  type: MusicAlbum
  date published: 2016-04-30