The Checkmates Ltd.
type: MusicGroup
genre: northern soul
popularity: 6
followers: 631
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xb9e03a27923b6222ad8d3a673b98b25a7ea2d954a34145892934a92fbfd83fa0
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954174
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954174
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7dc37933-a2db-4366-aca8-a2dc39604805.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7dc37933-a2db-4366-aca8-a2dc39604805.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/7dc37933-a2db-4366-aca8-a2dc39604805
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-18T03:01:36Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xb9e03a27923b6222ad8d3a673b98b25a7ea2d954a34145892934a92fbfd83fa0","name":"The Checkmates Ltd.","registered_at":"2026-06-17T09:25:35Z","symbol":"NIM1351971","token_address":"0x2e9c44ed382f0683cb666b73e6caffb792bcbb6c","type":"artist","uuid":"7dc37933-a2db-4366-aca8-a2dc39604805"}
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 0xb9e03a27923b6222ad8d3a673b98b25a7ea2d954a34145892934a92fbfd83fa0. Chain 2 (Bitcoin): anchored in block 954174 (2026-06-18T03:01:36Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7dc37933-a2db-4366-aca8-a2dc39604805.json and https://artists.proofprofile.net/proofs/artist/7dc37933-a2db-4366-aca8-a2dc39604805.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-18T03:01:36Z
  text: {"copyright_id":"0xb9e03a27923b6222ad8d3a673b98b25a7ea2d954a34145892934a92fbfd83fa0","name":"The Checkmates Ltd.","registered_at":"2026-06-17T09:25:35Z","symbol":"NIM1351971","token_address":"0x2e9c44ed382f0683cb666b73e6caffb792bcbb6c","type":"artist","uuid":"7dc37933-a2db-4366-aca8-a2dc39604805"}
album: Love Is All We Have To Give
  type: MusicAlbum
  date published: 1969-01-01
album: Love Is All We Have To Give
  type: MusicAlbum
  date published: 1969-01-01
  track: Proud Mary
    type: MusicRecording
    duration: PT3M45S
    duration ms: 225600
    explicit: false
    by artist: The Checkmates Ltd.
    in album: Love Is All We Have To Give
      type: MusicAlbum
      date published: 1969-01-01
    genre: northern soul
    isrc code: USAM10400246
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-22T01:39:34+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x6ff4db5fde3ec21565310dee85978776e670e1e630ab2292757925a223b5a0a9
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 959087
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/959087
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USAM10400246
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-22T02:05:55Z
    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 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 0x6ff4db5fde3ec21565310dee85978776e670e1e630ab2292757925a223b5a0a9. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/USAM10400246.
      date published: 2026-07-22T02:05:55Z
    audio: Proud Mary
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 140.861
      additional property: Musical Key
        type: PropertyValue
        value: 7
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.457
      additional property: Energy
        type: PropertyValue
        value: 0.913
      additional property: Speechiness
        type: PropertyValue
        value: 0.039
      additional property: Acousticness
        type: PropertyValue
        value: 0.207
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.736
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.755
      additional property: Loudness (dB)
        type: PropertyValue
        value: -5.686
      additional property: Key Name
        type: PropertyValue
        value: G
      additional property: Mode Name
        type: PropertyValue
        value: Major
  track: Love Is All I Have To Give
    type: MusicRecording
    duration: PT4M15S
    duration ms: 255826
    explicit: false
    by artist: The Checkmates Ltd.
    in album: Love Is All We Have To Give
      type: MusicAlbum
      date published: 1969-01-01
    genre: northern soul
    isrc code: USAM10400250
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-19T10:15:03+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xc07373e8e3e3c75343b9a3e612472d8af59b2cc4b7dc950e2d2fd15f8c50be07
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958721
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958721
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USAM10400250
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-19T11:02:33Z
    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 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 0xc07373e8e3e3c75343b9a3e612472d8af59b2cc4b7dc950e2d2fd15f8c50be07. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/USAM10400250.
      date published: 2026-07-19T11:02:33Z
    audio: Love Is All I Have To Give
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 76.068
      additional property: Musical Key
        type: PropertyValue
        value: 10
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.217
      additional property: Energy
        type: PropertyValue
        value: 0.796
      additional property: Speechiness
        type: PropertyValue
        value: 0.055
      additional property: Acousticness
        type: PropertyValue
        value: 0.835
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.012
      additional property: Liveness
        type: PropertyValue
        value: 0.172
      additional property: Valence (Positivity)
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name

Valence (Positivity)
type: PropertyValue
value: 0.487

Loudness (dB)
type: PropertyValue
value: -5.733

Key Name
type: PropertyValue
value: Bb

Mode Name
type: PropertyValue
value: Major