Jan Keizer
type: MusicGroup
genre: indorock
genre: nederpop
description: Jan Keizer may refer to: Jan Keizer (referee) (1940-2024), Dutch referee Jan Keizer (singer) (born 1949), Dutch singer and composer
popularity: 30
followers: 3370
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x06f68354e402c4ba96a796a47f0432e9e55fc840bb9b2c274d73f60c595667e2
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953407
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953407
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/469fa1ff-6bca-4725-9595-f02b9b036fcc.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/469fa1ff-6bca-4725-9595-f02b9b036fcc.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/469fa1ff-6bca-4725-9595-f02b9b036fcc
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x06f68354e402c4ba96a796a47f0432e9e55fc840bb9b2c274d73f60c595667e2","name":"Jan Keizer","registered_at":"2026-06-11T18:59:09Z","symbol":"NIM0093039","token_address":"0xac6813cfa302e8bab0f4f0a53ed2f97c0770ba70","type":"artist","uuid":"469fa1ff-6bca-4725-9595-f02b9b036fcc"}
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 0x06f68354e402c4ba96a796a47f0432e9e55fc840bb9b2c274d73f60c595667e2. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/469fa1ff-6bca-4725-9595-f02b9b036fcc.json and https://artists.proofprofile.net/proofs/artist/469fa1ff-6bca-4725-9595-f02b9b036fcc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T19:24:56Z
  text: {"copyright_id":"0x06f68354e402c4ba96a796a47f0432e9e55fc840bb9b2c274d73f60c595667e2","name":"Jan Keizer","registered_at":"2026-06-11T18:59:09Z","symbol":"NIM0093039","token_address":"0xac6813cfa302e8bab0f4f0a53ed2f97c0770ba70","type":"artist","uuid":"469fa1ff-6bca-4725-9595-f02b9b036fcc"}
album: L'Aventure
  type: MusicAlbum
  date published: 2000-01-01
album: Going Back In Time
  type: MusicAlbum
  date published: 2001-01-01
  track: Come A Little Bit Closer
    type: MusicRecording
    duration: PT2M52S
    duration ms: 172840
    explicit: false
    by artist: Jan Keizer
    in album: Going Back In Time
      type: MusicAlbum
      date published: 2001-01-01
    genre: indorock
    genre: nederpop
    isrc code: NLD760100004
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-21T12:49:59+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xf31df4ae412e9a0d91adcb1801cf61429b01f9a5ca2b2313d72238f23ac6b4aa
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 959008
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/959008
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLD760100004
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-21T13:14:05Z
    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 0xf31df4ae412e9a0d91adcb1801cf61429b01f9a5ca2b2313d72238f23ac6b4aa. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/NLD760100004.
      date published: 2026-07-21T13:14:05Z
    audio: Come A Little Bit Closer
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 131.998
      additional property: Musical Key
        type: PropertyValue
        value: 1
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 1
      additional property: Danceability
        type: PropertyValue
        value: 0.734
      additional property: Energy
        type: PropertyValue
        value: 0.625
      additional property: Speechiness
        type: PropertyValue
        value: 0.03
      additional property: Acousticness
        type: PropertyValue
        value: 0.122
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.063
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.948
      additional property: Loudness (dB)
        type: PropertyValue
        value: -8.813
      additional property: Key Name
        type: PropertyValue
        value: C#
      additional property: Mode Name
        type: PropertyValue
        value: Major
  track: In Dreams
    type: MusicRecording
    duration: PT2M47S
    duration ms: 167000
    explicit: false
    by artist: Jan Keizer
    in album: Going Back In Time
      type: MusicAlbum
      date published: 2001-01-01
    genre: indorock
    genre: nederpop
    isrc code: NLD760100005
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-21T08:35:21+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x6656b6beae7dbc551b10f2b83278afadcc5b0acf38e6285c60327b108040b76a
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958987
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958987
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLD760100005
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-21T09:04:56Z
    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 0x6656b6beae7dbc551b10f2b83278afadcc5b0acf38e6285c60327b108040b76a. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/NLD760100005.
      date published: 2026-07-21T09:04:56Z
    audio: In Dreams
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 109.993
      additional property: Musical Key
        type: PropertyValue
        value: 11
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.662
      additional property: Energy
        type: PropertyValue
        value: 0.529
      additional property: Speechiness
        type: PropertyValue
        value: 0.026
      additional property: Acousticness
        type: PropertyValue
        value: 0.245
      additional property: Instrumentalness
      additional property: Liveness
      additional property: Valence (Positivity)
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name
  track: Let Your Love Flow
album: Going Back In Time II
album: Going Back In Time III
album: Geef Mij Je Lach
album: Zie ik jou dan is het zomer (zomer versie)
album: Longing For The Summer
album: Chords Of Life
album: Take Me To Ibiza
album: Favorieten Expres
album: The time of my life
track: Kameraden

Instrumentalness
type: PropertyValue
value: 0

Liveness
type: PropertyValue
value: 0.329

Valence (Positivity)
type: PropertyValue
value: 0.765

Loudness (dB)
type: PropertyValue
value: -7.904

Key Name
type: PropertyValue
value: B

Mode Name
type: PropertyValue
value: Major

Let Your Love Flow
type: MusicRecording
duration: PT3M5S
duration ms: 185653
explicit: false
by artist: Jan Keizer
in album: Going Back In Time
  type: MusicAlbum
  date published: 2001-01-01
genre: indorock
genre: nederpop
isrc code: NLD760100008
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-06T03:45:08+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x052eccec07a977cf1c5da7311aba378d21599941f0b493db7a5d987075511186
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956891
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956891
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLD760100008
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-06T07:16:32Z
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 0x052eccec07a977cf1c5da7311aba378d21599941f0b493db7a5d987075511186. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/NLD760100008.
  date published: 2026-07-06T07:16:32Z
audio: Let Your Love Flow
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 108.364
  additional property: Musical Key
    type: PropertyValue
    value: 3
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.597
  additional property: Energy
    type: PropertyValue
    value: 0.796
  additional property: Speechiness
    type: PropertyValue
    value: 0.029
  additional property: Acousticness
    type: PropertyValue
    value: 0.003
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.32
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.787
  additional property: Loudness (dB)
    type: PropertyValue
    value: -8.698
  additional property: Key Name
    type: PropertyValue
    value: Eb
  additional property: Mode Name
    type: PropertyValue
    value: Major

Going Back In Time II
type: MusicAlbum
date published: 2003-01-01
track: Personality
  type: MusicRecording
  duration: PT2M37S
  duration ms: 157613
  explicit: false
  by artist: Jan Keizer
  in album: Going Back In Time II
    type: MusicAlbum
    date published: 2003-01-01
  genre: indorock
  genre: nederpop
  isrc code: NLD760110022
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-21T00:04:44+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xee4f1b9a5d1d83d7d9dd1d78454a7535476e38d721c3e22b4c079f36c295dfe9
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958943
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958943
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLD760110022
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-21T00:27:37Z
  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 0xee4f1b9a5d1d83d7d9dd1d78454a7535476e38d721c3e22b4c079f36c295dfe9. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/NLD760110022.
    date published: 2026-07-21T00:27:37Z
  audio: Personality
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 127.368
    additional property: Musical Key
      type: PropertyValue
      value: 5
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.741
    additional property: Energy
      type: PropertyValue
      value: 0.673
    additional property: Speechiness
      type: PropertyValue
      value: 0.031
    additional property: Acousticness
      type: PropertyValue
      value: 0.453
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.29
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.93
    additional property: Loudness (dB)
      type: PropertyValue
      value: -6.079
    additional property: Key Name
      type: PropertyValue
      value: F
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: Things
  type: MusicRecording
  duration: PT2M33S
  duration ms: 153760
  explicit: false
  by artist: Jan Keizer
  in album: Going Back In Time II
    type: MusicAlbum
    date published: 2003-01-01
  genre: indorock
  genre: nederpop
  isrc code: NLD760110023
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-18T10:58:51+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xf2a8d903c1202a9a77b21b28d70798b5c3aa618bca3981deda927787d36d0bbb
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958541
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958541
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLD760110023
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-18T11:37:54Z
  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 0xf2a8d903c1202a9a77b21b28d70798b5c3aa618bca3981deda927787d36d0bbb. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/NLD760110023.
    date published: 2026-07-18T11:37:54Z
  audio: Things
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 87.529
    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: 0.657
    additional property: Energy
      type: PropertyValue
      value: 0.58
    additional property: Speechiness
      type: PropertyValue
      value: 0.034
    additional property: Acousticness
      type: PropertyValue
      value: 0.692
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.134
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.951
    additional property: Loudness (dB)
      type: PropertyValue
      value: -8.3
    additional property: Key Name
      type: PropertyValue
      value: E
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: The Great Pretender
  type: MusicRecording
  duration: PT2M40S
  duration ms: 160586
  explicit: false
  by artist: Jan Keizer
  in album: Going Back In Time II
    type: MusicAlbum
    date published: 2003-01-01
  genre: indorock
  genre: nederpop
  isrc code: NLD760110024
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-18T09:34:10+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xb2732cb1e09316f2bb35404203b996f6bd49428d3acec18ed179c6efc923c0a6
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958535
  additional property: OTSBitcoinBlockVerifyURL
  additional property: OTSVerificationAPI
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: The Great Pretender
track: Only The Lonely
track: Lonely Boy
track: Let's Dance
track: Devil Woman
track: What Do You Want To Make Those Eye For
track: Kiss Me Quick

OTSBitcoinBlockVerifyURL
type: PropertyValue
value: https://blockstream.info/api/block-height/958535

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLD760110024

OTSTimestamp
type: PropertyValue
value: 2026-07-18T09:42:49Z

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

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2732cb1e09316f2bb35404203b996f6bd49428d3acec18ed179c6efc923c0a6. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/NLD760110024.
date published: 2026-07-18T09:42:49Z

The Great Pretender
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 113.333
additional property: Musical Key
  type: PropertyValue
  value: 7
additional property: Mode (Major/Minor)
  type: PropertyValue
  value: 1
additional property: Time Signature
  type: PropertyValue
  value: 3
additional property: Danceability
  type: PropertyValue
  value: 0.684
additional property: Energy
  type: PropertyValue
  value: 0.469
additional property: Speechiness
  type: PropertyValue
  value: 0.029
additional property: Acousticness
  type: PropertyValue
  value: 0.801
additional property: Instrumentalness
  type: PropertyValue
  value: 0
additional property: Liveness
  type: PropertyValue
  value: 0.125
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.816
additional property: Loudness (dB)
  type: PropertyValue
  value: -8.209
additional property: Key Name
  type: PropertyValue
  value: G
additional property: Mode Name
  type: PropertyValue
  value: Major

Only The Lonely
type: MusicRecording
duration: PT2M23S
duration ms: 143426
explicit: false
by artist: Jan Keizer
in album: Going Back In Time II
  type: MusicAlbum
  date published: 2003-01-01
genre: indorock
genre: nederpop
isrc code: NLD760110026
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-20T19:04:43+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x2b1f5be9fee0e8e18ef41987097b3679e238beb4846602c8dbba5710149ae70d
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958931
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/958931
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLD760110026
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-20T21:15:01Z
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 0x2b1f5be9fee0e8e18ef41987097b3679e238beb4846602c8dbba5710149ae70d. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/NLD760110026.
  date published: 2026-07-20T21:15:01Z
audio: Only The Lonely
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 123.317
  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: 0.662
  additional property: Energy
    type: PropertyValue
    value: 0.528
  additional property: Speechiness
    type: PropertyValue
    value: 0.033
  additional property: Acousticness
    type: PropertyValue
    value: 0.617
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.407
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.955
  additional property: Loudness (dB)
    type: PropertyValue
    value: -8.154
  additional property: Key Name
    type: PropertyValue
    value: E
  additional property: Mode Name
    type: PropertyValue
    value: Major

Lonely Boy
type: MusicRecording
duration: PT2M42S
duration ms: 162653
explicit: false
by artist: Jan Keizer
in album: Going Back In Time II
  type: MusicAlbum
  date published: 2003-01-01
genre: indorock
genre: nederpop
isrc code: NLD760110028
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-17T16:38:35+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xd037f4c22c7444db6c4e218aa73de8ab35023dfc43ab2bcad22a283c83c65dc8
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958444
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/958444
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLD760110028
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-17T19:12:23Z
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 0xd037f4c22c7444db6c4e218aa73de8ab35023dfc43ab2bcad22a283c83c65dc8. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/NLD760110028.
  date published: 2026-07-17T19:12:23Z
audio: Lonely Boy
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 98.702
  additional property: Musical Key
    type: PropertyValue
    value: 0
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 3
  additional property: Danceability
    type: PropertyValue
    value: 0.664
  additional property: Energy
    type: PropertyValue
    value: 0.45
  additional property: Speechiness
    type: PropertyValue
    value: 0.027
  additional property: Acousticness
    type: PropertyValue
    value: 0.269
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.178
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.704
  additional property: Loudness (dB)
    type: PropertyValue
    value: -7.705
  additional property: Key Name
    type: PropertyValue
    value: C
  additional property: Mode Name
    type: PropertyValue
    value: Major

Let's Dance
type: MusicRecording
duration: PT2M11S
duration ms: 131453
explicit: false
by artist: Jan Keizer
in album: Going Back In Time II
  type: MusicAlbum
  date published: 2003-01-01
genre: indorock
genre: nederpop
isrc code: NLD760110029
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-21T12:45:09+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x382b6f06b42f932cda8ff2e67988d1c948c924f6cf7f37d995d18bb92c0330ee
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 959008
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/959008
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLD760110029
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-21T13:14:05Z
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 0x382b6f06b42f932cda8ff2e67988d1c948c924f6cf7f37d995d18bb92c0330ee. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/NLD760110029.
  date published: 2026-07-21T13:14:05Z
audio: Let's Dance
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 153.994
  additional property: Musical Key
    type: PropertyValue
    value: 4
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.721
  additional property: Energy
    type: PropertyValue
    value: 0.774
  additional property: Speechiness
    type: PropertyValue
    value: 0.03
  additional property: Acousticness
    type: PropertyValue
    value: 0.179
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.002
  additional property: Liveness
    type: PropertyValue
    value: 0.164
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.969
  additional property: Loudness (dB)
    type: PropertyValue
    value: -8.426
  additional property: Key Name
    type: PropertyValue
    value: E
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Devil Woman
type: MusicRecording
duration: PT2M53S
duration ms: 173360
explicit: false
by artist: Jan Keizer
in album: Going Back In Time II
  type: MusicAlbum
  date published: 2003-01-01
genre: indorock
genre: nederpop
isrc code: NLD760110030
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-04T22:38:55+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x932a21a7b3c85ae9850d2f932e29ac60939d4b8b60db7c44e65d7af33a4558ef
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/NLD760110030
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 0x932a21a7b3c85ae9850d2f932e29ac60939d4b8b60db7c44e65d7af33a4558ef. 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/NLD760110030.
  date published: 2026-07-05T01:12:41Z
audio: Devil Woman
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 144.475
  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: 0.622
  additional property: Energy
    type: PropertyValue
    value: 0.376
  additional property: Speechiness
    type: PropertyValue
    value: 0.037
  additional property: Acousticness
    type: PropertyValue
    value: 0.794
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.002
  additional property: Liveness
    type: PropertyValue
    value: 0.15
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.749
  additional property: Loudness (dB)
    type: PropertyValue
    value: -11.226
  additional property: Key Name
    type: PropertyValue
    value: E
  additional property: Mode Name
    type: PropertyValue
    value: Major

What Do You Want To Make Those Eye For
type: MusicRecording
duration: PT2M1S
duration ms: 121746
explicit: false
by artist: Jan Keizer
in album: Going Back In Time II
  type: MusicAlbum
  date published: 2003-01-01
genre: indorock
genre: nederpop
isrc code: NLD760110031
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-05T18:27:26+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x1f5a0c033e73f786b5ee38c69039c7c7b78de4839d9b6477c1362cca400aaccd
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956826
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956826
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLD760110031
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-05T19:27:56Z
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 0x1f5a0c033e73f786b5ee38c69039c7c7b78de4839d9b6477c1362cca400aaccd. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NLD760110031.
  date published: 2026-07-05T19:27:56Z
audio: What Do You Want To Make Those Eye For
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 114.197
  additional property: Musical Key
    type: PropertyValue
    value: 1
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.565
  additional property: Energy
    type: PropertyValue
    value: 0.528
  additional property: Speechiness
    type: PropertyValue
    value: 0.042
  additional property: Acousticness
    type: PropertyValue
    value: 0.767
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.093
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.901
  additional property: Loudness (dB)
    type: PropertyValue
    value: -9.177
  additional property: Key Name
    type: PropertyValue
    value: C#
  additional property: Mode Name
    type: PropertyValue
    value: Major

Kiss Me Quick
type: MusicRecording
duration: PT2M49S
duration ms: 169480
explicit: false
by artist: Jan Keizer
in album: Going Back In Time II
  type: MusicAlbum
  date published: 2003-01-01
genre: indorock
genre: nederpop
isrc code: NLD760110032
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-16T03:03:43+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xc0aff4784ee9e7866d6081a6cbd68803f7a932aeb57feaa88d38b2227e48ef49
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958234
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/958234
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLD760110032
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-16T03:46:09Z
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 0xc0aff4784ee9e7866d6081a6cbd68803f7a932aeb57feaa88d38b2227e48ef49. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/NLD760110032.
  date published: 2026-07-16T03:46:09Z
audio: Kiss Me Quick
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 133.843
  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: 0.646
  additional property: Energy
    type: PropertyValue
    value: 0.775
  additional property: Speechiness
    type: PropertyValue
    value: 0.036
  additional property: Acousticness
    type: PropertyValue
    value: 0.321
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.301
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.949
  additional property: Loudness (dB)
    type: PropertyValue
    value: -7.564
  additional property: Key Name
    type: PropertyValue
    value: Bb
  additional property: Mode Name
    type: PropertyValue
    value: Major

Going Back In Time III
type: MusicAlbum
date published: 2004-01-01

Geef Mij Je Lach
type: MusicAlbum
date published: 2007-01-01
track: Geef Mij Je Lach
  type: MusicRecording
  duration: PT4M4S
  duration ms: 244466
  explicit: false
  by artist: Jan Keizer
  in album: Geef Mij Je Lach
    type: MusicAlbum
    date published: 2007-01-01
  genre: indorock
  genre: nederpop
  isrc code: NLUM70700549
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-21T09:14:35+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xe5b2be8b7a85d17fab1359913a2308cd0c96ed37a471b18e11cb7cf6e6f42f62
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958991
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958991
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLUM70700549
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-21T10:04:40Z
  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
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    date published: 2026-07-21T10:04:40Z
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Geef Mij Je Lach
type: MusicAlbum
date published: 2007-01-01

Zie ik jou dan is het zomer (zomer versie)
type: MusicAlbum
date published: 2008-01-01

Longing For The Summer
type: MusicAlbum
date published: 2009-01-01

Chords Of Life
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date published: 2009-01-01
track: Go Your Own Way
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-16T16:14:30Z
  audio: Go Your Own Way
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Take Me To Ibiza
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date published: 2010-07-02
track: Take Me To Ibiza
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  in album: Take Me To Ibiza
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    date published: 2010-07-02
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  additional property: OTSVerifyInstructions
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    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
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    date published: 2026-07-03T08:56:35Z
  audio: Take Me To Ibiza
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track: Is It Love Like Before
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    date published: 2010-07-02
  genre: indorock
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  additional property: OTSTimestamp
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  additional property: OTSVerifyInstructions
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    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
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    date published: 2026-07-05T10:01:46Z
  audio: Is It Love Like Before
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Favorieten Expres
type: MusicAlbum
date published: 2019-02-22

The time of my life
type: MusicAlbum
date published: 2020-03-03

The time of my life
type: MusicAlbum
date published: 2020-03-03

Kameraden
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duration: PT2M49S
duration ms: 169455
explicit: false
by artist: Ancora
by artist: Jan Smit
by artist: Jan Keizer
in album: Kameraden
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  date published: 2024-09-27
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-06-13T12:47:07Z
audio: Kameraden
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