Jeroen Kramer
type: MusicGroup
genre: nederpop
description: Jeroen Robert Kramer (born 1967 in Amsterdam) is a Dutch contemporary photographer. He started his career as a freelance photographer for the Dutch quality daily De Volkskrant which sent him to Iraq t
popularity: 7
followers: 330
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954066
additional property: OTSProofURL
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additional property: OTSRecordURL
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additional property: OTSVerificationAPI
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  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/57b4703a-8dde-4626-9760-3a68998f161a
additional property: OTSTimestamp
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additional property: OTSCanonicalRecord
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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
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8566d81944cbd636595effa33ac50f24b51fb21f5840f4c511f76ff30c22728c. 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/57b4703a-8dde-4626-9760-3a68998f161a.json and https://artists.proofprofile.net/proofs/artist/57b4703a-8dde-4626-9760-3a68998f161a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
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album: Miljoenen Idioten
  type: MusicAlbum
  date published: 2013-04-01
album: Dat Ben Ik
  type: MusicAlbum
  date published: 2019-09-02
album: Beter Dan Dit
  type: MusicAlbum
  date published: 2020-08-12
album: Liegen Kan Ze Niet
  type: MusicAlbum
  date published: 2020-10-08
album: Onzichtbare Man
  type: MusicAlbum
  date published: 2021-01-22
album: De Pont Naar Noord
  type: MusicAlbum
  date published: 2021-09-16
album: Prins van Oranje (De liedjes!)
  type: MusicAlbum
  date published: 2021-11-15
album: Geweermanbaas
  type: MusicAlbum
  date published: 2022-10-19
album: Beter dan dit wordt het niet
  type: MusicAlbum
  date published: 2023-01-05
album: Na de storm
  type: MusicAlbum
  date published: 2023-01-13
  track: Geweermanbaas
    type: MusicRecording
    duration: PT3M50S
    duration ms: 230949
    explicit: false
    by artist: Jeroen Kramer
    in album: Na de storm
      type: MusicAlbum
      date published: 2023-01-13
    genre: nederpop
    isrc code: QZPLS2244025
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    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPLS2244025
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-02T03:55:08Z
    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
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      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2171a63fd9b0993758723cbc1bcf638721ee35f64e9252865e075ef3d977a7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZPLS2244025.
      date published: 2026-07-02T03:55:08Z
    audio: Geweermanbaas
      type: AudioObject
      additional property: Tempo (BPM)
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        type: PropertyValue
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      additional property: Mode (Major/Minor)
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      additional property: Time Signature
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        value: 5
      additional property: Danceability
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      additional property: Energy
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      additional property: Speechiness
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      additional property: Acousticness
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      additional property: Instrumentalness
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      additional property: Liveness
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      additional property: Valence (Positivity)
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      additional property: Loudness (dB)
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        value: -13.808
      additional property: Key Name
        type: PropertyValue
        value: C
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: Gunman Boss
  type: MusicAlbum
  date published: 2023-03-08
album: Bobby's bal
  type: MusicAlbum
  date published: 2024-08-26
album: Een redelijk gesprek
  type: MusicAlbum
  date published: 2024-10-25
album: Dwalen door de mist
  type: MusicAlbum
  date published: 2025-01-04
album: Het water van maart
  type: MusicAlbum
  date published: 2025-03-21
album: Henk is weg
  type: MusicAlbum
  date published: 2025-05-06
album: Penis & Vagina
  type: MusicAlbum
  date published: 2025-07-25
  track: Penis & Vagina
    type: MusicRecording
    duration: PT3M21S
    duration ms: 201492
    explicit: true
    by artist: Jeroen Kramer
    in album: Penis & Vagina
      type: MusicAlbum
      date published: 2025-07-25
    genre: nederpop
    isrc code: NL2AW2500005
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    additional property: CopyrightStatus
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    additional property: OTSVerificationAPI
    additional property: OTSTimestamp
    additional property: OTSVerifyInstructions
    subject of: OpenTimestamps Proof of Existence
    audio: Penis & Vagina
album: Jij Amsterdam
album: Het Beest

OTSBitcoinBlockVerifyURL
type: PropertyValue
value: https://blockstream.info/api/block-height/958444

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NL2AW2500005

OTSTimestamp
type: PropertyValue
value: 2026-07-17T19:12:23Z

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 0x2c52c0cd438a9c2343b1e354f3c5a5d7af207db57162cb0b448e9f522208d890. 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/NL2AW2500005.
date published: 2026-07-17T19:12:23Z

Penis & Vagina
type: AudioObject
additional property: Tempo (BPM)
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  value: 63.433
additional property: Musical Key
  type: PropertyValue
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additional property: Mode (Major/Minor)
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additional property: Time Signature
  type: PropertyValue
  value: 3
additional property: Danceability
  type: PropertyValue
  value: 0.417
additional property: Energy
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additional property: Speechiness
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  value: 0.076
additional property: Acousticness
  type: PropertyValue
  value: 0.727
additional property: Instrumentalness
  type: PropertyValue
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additional property: Liveness
  type: PropertyValue
  value: 0.164
additional property: Valence (Positivity)
  type: PropertyValue
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additional property: Loudness (dB)
  type: PropertyValue
  value: -12.77
additional property: Key Name
  type: PropertyValue
  value: B
additional property: Mode Name
  type: PropertyValue
  value: Minor

Jij Amsterdam
type: MusicAlbum
date published: 2025-08-29
track: Jij Amsterdam
  type: MusicRecording
  duration: PT3M9S
  duration ms: 189331
  explicit: false
  by artist: Jeroen Kramer
  in album: Jij Amsterdam
    type: MusicAlbum
    date published: 2025-08-29
  genre: nederpop
  isrc code: NL2AW2500006
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-06T02:11:16+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x41d901c247176e0d38d6a7c460252c28bb975b6964d4485910e915adfaedec47
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  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956889
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NL2AW2500006
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-06T06:56:49Z
  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 0x41d901c247176e0d38d6a7c460252c28bb975b6964d4485910e915adfaedec47. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NL2AW2500006.
    date published: 2026-07-06T06:56:49Z
  audio: Jij Amsterdam
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 104.553
    additional property: Musical Key
      type: PropertyValue
      value: 3
    additional property: Mode (Major/Minor)
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      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.559
    additional property: Energy
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    additional property: Speechiness
      type: PropertyValue
      value: 0.052
    additional property: Acousticness
      type: PropertyValue
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    additional property: Instrumentalness
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      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.117
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.476
    additional property: Loudness (dB)
      type: PropertyValue
      value: -12.721
    additional property: Key Name
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      value: Eb
    additional property: Mode Name
      type: PropertyValue
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Het Beest
type: MusicAlbum
date published: 2025-10-08