K.C. Douglas
type: MusicGroup
genre: blues
genre: classic blues
genre: country blues
popularity: 4
followers: 523
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x6e4e724eef5511b6e953705f811aa89984fe28ff7e2f5dab23fef326d46945dd
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954066
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954066
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/6d07bd8f-0bb3-4687-a608-cec9cc067136.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/6d07bd8f-0bb3-4687-a608-cec9cc067136.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/6d07bd8f-0bb3-4687-a608-cec9cc067136
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x6e4e724eef5511b6e953705f811aa89984fe28ff7e2f5dab23fef326d46945dd","name":"K.C. Douglas","registered_at":"2026-06-17T03:38:48Z","symbol":"NIM1269273","token_address":"0x7c407c437b894ebf6ffcc2ccb13c5329c721dcde","type":"artist","uuid":"6d07bd8f-0bb3-4687-a608-cec9cc067136"}
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 0x6e4e724eef5511b6e953705f811aa89984fe28ff7e2f5dab23fef326d46945dd. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6d07bd8f-0bb3-4687-a608-cec9cc067136.json and https://artists.proofprofile.net/proofs/artist/6d07bd8f-0bb3-4687-a608-cec9cc067136.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0x6e4e724eef5511b6e953705f811aa89984fe28ff7e2f5dab23fef326d46945dd","name":"K.C. Douglas","registered_at":"2026-06-17T03:38:48Z","symbol":"NIM1269273","token_address":"0x7c407c437b894ebf6ffcc2ccb13c5329c721dcde","type":"artist","uuid":"6d07bd8f-0bb3-4687-a608-cec9cc067136"}
album: K.C. Douglas: A Dead Beat Guitar and the Mississippi Blues
  type: MusicAlbum
  date published: 1952-01-01
album: K.C.'s Blues
  type: MusicAlbum
  date published: 1990-01-01
album: K.C.'s Blues
  type: MusicAlbum
  date published: 1990-01-01
album: Big Road Blues
  type: MusicAlbum
  date published: 1994-01-01
album: Big Road Blues
  type: MusicAlbum
  date published: 1994-01-01
album: Mercury Blues
  type: MusicAlbum
  date published: 1998
album: Mercury Blues
  type: MusicAlbum
  date published: 1998-01-01
  track: Mercury Blues
    type: MusicRecording
    duration: PT2M36S
    duration ms: 156101
    explicit: false
    by artist: K.C. Douglas
    in album: Mercury Blues
      type: MusicAlbum
      date published: 1998-01-01
    genre: blues
    genre: classic blues
    genre: country blues
    isrc code: USAP39847501
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-05T22:21:21+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x8148535a4d55a5ec3cee6a799ff86048973eb1bb04b03a2158cb0566d08b886d
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956857
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956857
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USAP39847501
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-06T01:26:17Z
    additional property: OTSVerifyInstructions
      type: PropertyValue
      value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8148535a4d55a5ec3cee6a799ff86048973eb1bb04b03a2158cb0566d08b886d. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USAP39847501.
      date published: 2026-07-06T01:26:17Z
    audio: Mercury Blues
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 140.104
      additional property: Musical Key
        type: PropertyValue
        value: 4
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.669
      additional property: Energy
        type: PropertyValue
        value: 0.527
      additional property: Speechiness
        type: PropertyValue
        value: 0.049
      additional property: Acousticness
        type: PropertyValue
        value: 0.583
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.082
      additional property: Liveness
        type: PropertyValue
        value: 0.46
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.909
      additional property: Loudness (dB)
        type: PropertyValue
        value: -11.45
      additional property: Key Name
        type: PropertyValue
        value: E
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Big Road Blues
  type: MusicAlbum
  date published: 2015-12-11
album: Broken Heart
  type: MusicAlbum
  date published: 2016-01-29
album: Mercury Blues
  type: MusicAlbum
  date published: 2021
album: Black Cat Bone
  type: MusicAlbum
  date published: 2021-08-18
album: Whiskey Headed Woman
  type: MusicAlbum
  date published: 2023-12-04