Barrett Deems
type: MusicGroup
genre: swing music
description: thumb|right thumb|right thumb|right|Barrett Deems performs with Louis Armstrong band and Velma Middleton in Oslo, Norway in 1955. Barrett Deems (March 1, 1914 – September 15, 1998) was an American sw
popularity: 10
followers: 62
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xdeb5d5d5b68127f42465fe30ea4ac83a7a753c50473be052547419c7ff36647e
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953864
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953864
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/0456c06e-6e43-4e16-b77e-043bc24b2c76.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/0456c06e-6e43-4e16-b77e-043bc24b2c76.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/0456c06e-6e43-4e16-b77e-043bc24b2c76
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T00:30:31Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xdeb5d5d5b68127f42465fe30ea4ac83a7a753c50473be052547419c7ff36647e","name":"Barrett Deems","registered_at":"2026-06-15T15:08:23Z","symbol":"NIM0746526","token_address":"0x7af882e467b5f339dfd3830d129481b63fe74b25","type":"artist","uuid":"0456c06e-6e43-4e16-b77e-043bc24b2c76"}
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 0xdeb5d5d5b68127f42465fe30ea4ac83a7a753c50473be052547419c7ff36647e. Chain 2 (Bitcoin): anchored in block 953864 (2026-06-16T00:30:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0456c06e-6e43-4e16-b77e-043bc24b2c76.json and https://artists.proofprofile.net/proofs/artist/0456c06e-6e43-4e16-b77e-043bc24b2c76.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T00:30:31Z
  text: {"copyright_id":"0xdeb5d5d5b68127f42465fe30ea4ac83a7a753c50473be052547419c7ff36647e","name":"Barrett Deems","registered_at":"2026-06-15T15:08:23Z","symbol":"NIM0746526","token_address":"0x7af882e467b5f339dfd3830d129481b63fe74b25","type":"artist","uuid":"0456c06e-6e43-4e16-b77e-043bc24b2c76"}
album: Deemus
  type: MusicAlbum
  date published: 1997-01-01