De Keefmen
type: MusicGroup
genre: garage rock
popularity: 9
followers: 93
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x6d276c2746b030eeb5d256b7ba7c1ca8d11a36cc914861ed70ef3ea0c68d747a
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953903
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953903
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/14893621-cf86-4178-b12b-e03b863473b9.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/14893621-cf86-4178-b12b-e03b863473b9.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/14893621-cf86-4178-b12b-e03b863473b9
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T07:05:05Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x6d276c2746b030eeb5d256b7ba7c1ca8d11a36cc914861ed70ef3ea0c68d747a","name":"De Keefmen","registered_at":"2026-06-15T20:47:11Z","symbol":"NIM0827361","token_address":"0xf3ba5e1a6c5aecf0cb6c3fea8fba07ada7da2f29","type":"artist","uuid":"14893621-cf86-4178-b12b-e03b863473b9"}
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 0x6d276c2746b030eeb5d256b7ba7c1ca8d11a36cc914861ed70ef3ea0c68d747a. Chain 2 (Bitcoin): anchored in block 953903 (2026-06-16T07:05:05Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/14893621-cf86-4178-b12b-e03b863473b9.json and https://artists.proofprofile.net/proofs/artist/14893621-cf86-4178-b12b-e03b863473b9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T07:05:05Z
  text: {"copyright_id":"0x6d276c2746b030eeb5d256b7ba7c1ca8d11a36cc914861ed70ef3ea0c68d747a","name":"De Keefmen","registered_at":"2026-06-15T20:47:11Z","symbol":"NIM0827361","token_address":"0xf3ba5e1a6c5aecf0cb6c3fea8fba07ada7da2f29","type":"artist","uuid":"14893621-cf86-4178-b12b-e03b863473b9"}
album: Mirror Of Time
  type: MusicAlbum
  date published: 2010-06-07
album: Mirror Of Time
  type: MusicAlbum
  date published: 2010-06-07
album: De Keefmen
  type: MusicAlbum
  date published: 2011-03-14
album: Me Keefmen, You Jane (Part 1)
  type: MusicAlbum
  date published: 2011-11-28
album: Me Keefman You Jane (Part 2)
  type: MusicAlbum
  date published: 2012-02-20
album: Things I Remember
  type: MusicAlbum
  date published: 2012-08-15
album: Reflection of Mind
  type: MusicAlbum
  date published: 2014-01-16
  track: Don't Let Me Down
    type: MusicRecording
    duration: PT3M14S
    duration ms: 194640
    explicit: false
    by artist: De Keefmen
    in album: Reflection of Mind
      type: MusicAlbum
      date published: 2014-01-16
    genre: garage rock
    isrc code: USCGH1403077
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-03T05:49:32+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x9c0d064662c57665b4055ed120a1042659235748eae148a28f1e54bc3018b97b
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956474
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956474
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGH1403077
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-03T08:56:35Z
    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 0x9c0d064662c57665b4055ed120a1042659235748eae148a28f1e54bc3018b97b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USCGH1403077.
      date published: 2026-07-03T08:56:35Z
    audio: Don't Let Me Down
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 141.226
      additional property: Musical Key
        type: PropertyValue
        value: 6
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.247
      additional property: Energy
        type: PropertyValue
        value: 0.906
      additional property: Speechiness
        type: PropertyValue
        value: 0.048
      additional property: Acousticness
        type: PropertyValue
        value: 0.051
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.163
      additional property: Liveness
        type: PropertyValue
        value: 0.057
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.765
      additional property: Loudness (dB)
        type: PropertyValue
        value: -2.415
      additional property: Key Name
        type: PropertyValue
        value: F#
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: Puttin' My Foot Down
  type: MusicAlbum
  date published: 2025-03-14
  track: Puttin' My Foot Down
    type: MusicRecording
    duration: PT2M54S
    duration ms: 174014
    explicit: false
    by artist: De Keefmen
    in album: Puttin' My Foot Down
      type: MusicAlbum
      date published: 2025-03-14
    genre: garage rock
    isrc code: NL1DL2500001
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-04T18:46:50+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x315f0da120cf484d7c04558df13aa9a3a62e9ec0a40ee1a5f38d3e31a689d540
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956725
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956725
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NL1DL2500001
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-05T01:12:41Z
    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 0x315f0da120cf484d7c04558df13aa9a3a62e9ec0a40ee1a5f38d3e31a689d540. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NL1DL2500001.
      date published: 2026-07-05T01:12:41Z
    audio: Puttin' My Foot Down
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 137.456
      additional property: Musical Key
        type: PropertyValue
        value: 9
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
      additional property: Energy
      additional property: Speechiness
      additional property: Acousticness
      additional property: Instrumentalness
      additional property: Liveness
      additional property: Valence (Positivity)
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name
album: Different Worlds

Danceability
type: PropertyValue
value: 0.456

Energy
type: PropertyValue
value: 0.901

Speechiness
type: PropertyValue
value: 0.045

Acousticness
type: PropertyValue
value: 0.003

Instrumentalness
type: PropertyValue
value: 0

Liveness
type: PropertyValue
value: 0.082

Valence (Positivity)
type: PropertyValue
value: 0.824

Loudness (dB)
type: PropertyValue
value: -6.483

Key Name
type: PropertyValue
value: A

Mode Name
type: PropertyValue
value: Major

Different Worlds
type: MusicAlbum
date published: 2025-05-02