Dora Carr
type: MusicGroup
description: Dora Carr was an American musician, best known for her work in the early and mid-1920s with pianist and arranger Cow Cow Davenport. Carr is best remembered for the song "Cow Cow Blues" and playing boo
popularity: 3
followers: 128
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x5c6d7c9fdf0ff67de007e0e2a9621b9023c27860055e99cc68b97554e61cb618
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953968
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953968
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/28977815-2488-4e44-9368-1f51d39c68e6.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/28977815-2488-4e44-9368-1f51d39c68e6.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/28977815-2488-4e44-9368-1f51d39c68e6
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T16:01:49Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x5c6d7c9fdf0ff67de007e0e2a9621b9023c27860055e99cc68b97554e61cb618","name":"Dora Carr","registered_at":"2026-06-16T03:44:38Z","symbol":"NIM0927020","token_address":"0x4767109d850e8c3c09f70c0a8275ed59bf8767be","type":"artist","uuid":"28977815-2488-4e44-9368-1f51d39c68e6"}
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 0x5c6d7c9fdf0ff67de007e0e2a9621b9023c27860055e99cc68b97554e61cb618. Chain 2 (Bitcoin): anchored in block 953968 (2026-06-16T16:01:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/28977815-2488-4e44-9368-1f51d39c68e6.json and https://artists.proofprofile.net/proofs/artist/28977815-2488-4e44-9368-1f51d39c68e6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T16:01:49Z
  text: {"copyright_id":"0x5c6d7c9fdf0ff67de007e0e2a9621b9023c27860055e99cc68b97554e61cb618","name":"Dora Carr","registered_at":"2026-06-16T03:44:38Z","symbol":"NIM0927020","token_address":"0x4767109d850e8c3c09f70c0a8275ed59bf8767be","type":"artist","uuid":"28977815-2488-4e44-9368-1f51d39c68e6"}
album: Bring It on Home Blues
  type: MusicAlbum
  date published: 2015-04-23