Marcel Boom
type: MusicGroup
popularity: 11
followers: 204
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x725d0cdee068b082c0bcd9a37e2627ca7a95f37e904de7be81a5573bd97516c1
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953803
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953803
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ed0c8441-ddb1-484b-927c-28b19644331f.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ed0c8441-ddb1-484b-927c-28b19644331f.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/ed0c8441-ddb1-484b-927c-28b19644331f
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T15:41:00Z
additional property: OTSCanonicalRecord
  type: PropertyValue
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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
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725d0cdee068b082c0bcd9a37e2627ca7a95f37e904de7be81a5573bd97516c1. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ed0c8441-ddb1-484b-927c-28b19644331f.json and https://artists.proofprofile.net/proofs/artist/ed0c8441-ddb1-484b-927c-28b19644331f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T15:41:00Z
  text: {"copyright_id":"0x725d0cdee068b082c0bcd9a37e2627ca7a95f37e904de7be81a5573bd97516c1","name":"Marcel Boom","registered_at":"2026-06-15T05:24:33Z","symbol":"NIM0695494","token_address":"0xe63caa14bf6226186fa64296b2d51f2e20beb30e","type":"artist","uuid":"ed0c8441-ddb1-484b-927c-28b19644331f"}
album: Movie Tunes That Should (not) Be Played on a Tuba
  type: MusicAlbum
  date published: 2021-02-26
  track: You Got a Friend in Me (From 'Toy Story')
    type: MusicRecording
    duration: PT2M22S
    duration ms: 142588
    explicit: false
    by artist: Randy Newman
    by artist: Marcel Boom
    by artist: Jorijn Van Hese
    in album: Movie Tunes That Should (not) Be Played on a Tuba
      type: MusicAlbum
      date published: 2021-02-26
    isrc code: NLHR52101234
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-06T07:42:13+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xcb0101217d00cccbe767a15f1506dc40c7e1811b5d4eb00b7a998f5afcc58429
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 957819
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/957819
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLHR52101234
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-13T07:53:33Z
    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 0xcb0101217d00cccbe767a15f1506dc40c7e1811b5d4eb00b7a998f5afcc58429. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/NLHR52101234.
      date published: 2026-07-13T07:53:33Z
    audio: You Got a Friend in Me (From 'Toy Story')
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 123.442
      additional property: Musical Key
        type: PropertyValue
        value: 3
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 5
      additional property: Danceability
        type: PropertyValue
        value: 0.692
      additional property: Energy
        type: PropertyValue
        value: 0.009
      additional property: Speechiness
        type: PropertyValue
        value: 0.046
      additional property: Acousticness
        type: PropertyValue
        value: 0.995
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.938
      additional property: Liveness
        type: PropertyValue
        value: 0.108
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.457
      additional property: Loudness (dB)
        type: PropertyValue
        value: -32.086
      additional property: Key Name
        type: PropertyValue
        value: Eb
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: March: This Is the Day (Euphonium, Cimbasso & Tuba Cover)
  type: MusicAlbum
  date published: 2024-07-05
album: Music Friends (Low Brass Recordings)
  type: MusicAlbum
  date published: 2024-01-26
album: Wings of Freedom, Swallowed by Greed (Trumpet, Baritone Horn, Euphonium & Tuba Multi-Track)
  type: MusicAlbum
  date published: 2022-10-14
album: For My Family - Lullaby (Baritone Horn Solo)
  type: MusicAlbum
  date published: 2021-08-27
album: Lamentoso
  type: MusicAlbum
  date published: 2021-08-15
album: Quick March: Simoraine (Baritone Horn, Euphonium & Tuba Multi-Track)
  type: MusicAlbum
  date published: 2021-07-23
album: Tuba Players at Sunday School (Baritone Horn, Euphonium, Cimbasso & Tuba Multi-Tracks)
  type: MusicAlbum
  date published: 2021-07-09
album: Grainger: Lincolnshire Posy (Baritone Horn, Euphonium & Tuba Multi-Tracks)
  type: MusicAlbum
  date published: 2021-05-14
album: Jubilee! (Baritone Horn, Euphonium & Tuba Multi-Track)
  type: MusicAlbum
  date published: 2021-04-09
album: Battle Royal (Euphonium & Tuba Multi-Track)
  type: MusicAlbum
  date published: 2021-03-19
album: Songs by Gowans & Larsson (Baritone Horn & Euphonium Multi-Tracks)
  type: MusicAlbum
  date published: 2022-03-25
album: Songs of Encouragement, Vol. II (Baritone Horn, Euphonium & Tuba Multi-Track)
  type: MusicAlbum
  date published: 2021-02-12
  track: Annie Laurie - Baritone Horn & Tuba Multi-Track
    type: MusicRecording
    duration: PT1M43S
    duration ms: 103348
    explicit: false
    by artist: Marcel Boom
    by artist: Jorijn Van Hese
    in album: Songs of Encouragement, Vol. II (Baritone Horn, Euphonium & Tuba Multi-Track)
      type: MusicAlbum
      date published: 2021-02-12
    isrc code: NLHR52100218
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-06-26T00:04:19+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x5b8321342e3fd74ef1413396d3be42cff4dcbd2817121d5293ee529517fe7377
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956304
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956304
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLHR52100218
    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
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8321342e3fd74ef1413396d3be42cff4dcbd2817121d5293ee529517fe7377. 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/NLHR52100218.
      date published: 2026-07-02T03:55:08Z
    audio: Annie Laurie - Baritone Horn & Tuba Multi-Track
album: Euphonic Gaming, Vol. 1 (Low Brass Covers)
album: A Christmas Celebration (Low Brass Cover)
album: Echoing the Spectrum (Euphonium Solo)
album: Music Friends, Spectacular Low Brass Covers
album: Fresh Start, Beautiful and Cheerful Hymn Tunes Jorijn Van Hese & Friends (Low Brass: Baritone Horn, Euphonium, Tuba & Piano Covers)
album: Mind Marauder

Annie Laurie - Baritone Horn & Tuba Multi-Track
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 97.316
additional property: Musical Key
  type: PropertyValue
  value: 0
additional property: Mode (Major/Minor)
  type: PropertyValue
  value: 1
additional property: Time Signature
  type: PropertyValue
  value: 4
additional property: Danceability
  type: PropertyValue
  value: 0.158
additional property: Energy
  type: PropertyValue
  value: 0.044
additional property: Speechiness
  type: PropertyValue
  value: 0.039
additional property: Acousticness
  type: PropertyValue
  value: 0.963
additional property: Instrumentalness
  type: PropertyValue
  value: 0.96
additional property: Liveness
  type: PropertyValue
  value: 0.118
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.263
additional property: Loudness (dB)
  type: PropertyValue
  value: -30.858
additional property: Key Name
  type: PropertyValue
  value: C
additional property: Mode Name
  type: PropertyValue
  value: Major

Euphonic Gaming, Vol. 1 (Low Brass Covers)
type: MusicAlbum
date published: 2024-08-16

A Christmas Celebration (Low Brass Cover)
type: MusicAlbum
date published: 2024-11-22

Echoing the Spectrum (Euphonium Solo)
type: MusicAlbum
date published: 2024-11-08

Music Friends, Spectacular Low Brass Covers
type: MusicAlbum
date published: 2024-12-27
track: Batman Theme
  type: MusicRecording
  duration: PT2M37S
  duration ms: 157144
  explicit: false
  by artist: Daniel Ridder
  by artist: Jorijn Van Hese
  in album: Music Friends, Spectacular Low Brass Covers
    type: MusicAlbum
    date published: 2024-12-27
  isrc code: NLHR52143324
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-22T07:11:08+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x01be3831eed899bfaa110fad14dd4b8f5f9a065655fcb01529aa43c6d0fd1cac
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 959107
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/959107
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLHR52143324
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-22T07:19:23Z
  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 0x01be3831eed899bfaa110fad14dd4b8f5f9a065655fcb01529aa43c6d0fd1cac. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/NLHR52143324.
    date published: 2026-07-22T07:19:23Z
  audio: Batman Theme
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 146.301
    additional property: Musical Key
      type: PropertyValue
      value: 11
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.372
    additional property: Energy
      type: PropertyValue
      value: 0.072
    additional property: Speechiness
      type: PropertyValue
      value: 0.037
    additional property: Acousticness
      type: PropertyValue
      value: 0.975
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.905
    additional property: Liveness
      type: PropertyValue
      value: 0.091
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.037
    additional property: Loudness (dB)
      type: PropertyValue
      value: -21.821
    additional property: Key Name
      type: PropertyValue
      value: B
    additional property: Mode Name
      type: PropertyValue
      value: Minor
track: Game of Thrones - Main Title Theme
  type: MusicRecording
  duration: PT2M45S
  duration ms: 165399
  explicit: false
  by artist: Marcel Boom
  by artist: German Dutch Tuba Collaboration
  by artist: Henry J. Huisjes
  by artist: Daniel Ridder
  by artist: Jorijn Van Hese
  in album: Music Friends, Spectacular Low Brass Covers
    type: MusicAlbum
    date published: 2024-12-27
  isrc code: NLHR52143327
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-06-24T16:17:19+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x6b4e5d13cc0212b0d81fabc450f6737e1fd9922d02b87a51dde3ad646e86abf0
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956304
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956304
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLHR52143327
  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
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4e5d13cc0212b0d81fabc450f6737e1fd9922d02b87a51dde3ad646e86abf0. 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/NLHR52143327.
    date published: 2026-07-02T03:55:08Z
  audio: Game of Thrones - Main Title Theme
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 173.618
    additional property: Musical Key
      type: PropertyValue
      value: 0
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.22
    additional property: Energy
      type: PropertyValue
      value: 0.045
    additional property: Speechiness
      type: PropertyValue
      value: 0.038
    additional property: Acousticness
      type: PropertyValue
      value: 0.988
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.83
    additional property: Liveness
      type: PropertyValue
      value: 0.101
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.109
    additional property: Loudness (dB)
      type: PropertyValue
      value: -24.409
    additional property: Key Name
      type: PropertyValue
      value: C
    additional property: Mode Name
      type: PropertyValue
      value: Minor

Fresh Start, Beautiful and Cheerful Hymn Tunes Jorijn Van Hese & Friends (Low Brass: Baritone Horn, Euphonium, Tuba & Piano Covers)
type: MusicAlbum
date published: 2025-01-10

Mind Marauder
type: MusicAlbum
date published: 2024-04-05