Hepie & Hepie
type: MusicGroup
genre: nederpop
genre: polka
popularity: 25
followers: 3816
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x04414a0726b5e77ba6c2deee9ae4d7ce0593c6225d763125ecd5695a5f7af2c7
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/0cc45047-7b79-43d1-b1f2-31194fccbd97.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/0cc45047-7b79-43d1-b1f2-31194fccbd97.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/0cc45047-7b79-43d1-b1f2-31194fccbd97
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x04414a0726b5e77ba6c2deee9ae4d7ce0593c6225d763125ecd5695a5f7af2c7","name":"Hepie & Hepie","registered_at":"2026-06-11T11:42:35Z","symbol":"NIM0017338","token_address":"0xfb6ad5ab6f2072d3357ac079ffc3c6b49e82615d","type":"artist","uuid":"0cc45047-7b79-43d1-b1f2-31194fccbd97"}
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04414a0726b5e77ba6c2deee9ae4d7ce0593c6225d763125ecd5695a5f7af2c7. 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/0cc45047-7b79-43d1-b1f2-31194fccbd97.json and https://artists.proofprofile.net/proofs/artist/0cc45047-7b79-43d1-b1f2-31194fccbd97.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T19:24:56Z
  text: {"copyright_id":"0x04414a0726b5e77ba6c2deee9ae4d7ce0593c6225d763125ecd5695a5f7af2c7","name":"Hepie & Hepie","registered_at":"2026-06-11T11:42:35Z","symbol":"NIM0017338","token_address":"0xfb6ad5ab6f2072d3357ac079ffc3c6b49e82615d","type":"artist","uuid":"0cc45047-7b79-43d1-b1f2-31194fccbd97"}
album: Ik Lig Op M'n Kussen Stil Te Dromen (Expanded Edition / Remastered 2024)
  type: MusicAlbum
  date published: 1980-01-01
album: Liefde (Expanded Edition / Remastered 2024)
  type: MusicAlbum
  date published: 1982-01-01
album: Jij was van mij
  type: MusicAlbum
  date published: 1983-08-01
album: Ik Lig Op M'n Kussen Stil Te Dromen
  type: MusicAlbum
  date published: 1989
  track: Ik Lig Op Mn Kussen Stil Te Dromen
    type: MusicRecording
    duration: PT3M47S
    duration ms: 227600
    explicit: false
    by artist: Hepie & Hepie
    in album: Ik Lig Op M'n Kussen Stil Te Dromen
      type: MusicAlbum
      date published: 1989
    genre: nederpop
    genre: polka
    isrc code: NLA240100841
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-03T05:45:31+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xa472024102638e54dcbd0a6c47c34346f899e01c7cda90794905d283affeb3e8
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956474
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956474
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA240100841
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-03T08:56:35Z
    additional property: OTSVerifyInstructions
      type: PropertyValue
      value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa472024102638e54dcbd0a6c47c34346f899e01c7cda90794905d283affeb3e8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA240100841.
      date published: 2026-07-03T08:56:35Z
    audio: Ik Lig Op Mn Kussen Stil Te Dromen
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 120.223
      additional property: Musical Key
        type: PropertyValue
        value: 7
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.714
      additional property: Energy
        type: PropertyValue
        value: 0.491
      additional property: Speechiness
        type: PropertyValue
        value: 0.054
      additional property: Acousticness
        type: PropertyValue
        value: 0.001
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.001
      additional property: Liveness
        type: PropertyValue
        value: 0.317
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.84
      additional property: Loudness (dB)
        type: PropertyValue
        value: -19.859
      additional property: Key Name
        type: PropertyValue
        value: G
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Met Hart En Ziel
  type: MusicAlbum
  date published: 1995-09-12
album: Ons Dorp / Us Doarp
  type: MusicAlbum
  date published: 2007-05-08
album: Ik Lig Op Mijn Kussen Stil Te Dromen
  type: MusicAlbum
  date published: 2007-08-28
album: De Grootste Hits Van...
  type: MusicAlbum
  date published: 2007-11-29
  track: Ons Dorp
    type: MusicRecording
    duration: PT3M31S
    duration ms: 211000
    explicit: false
    by artist: Hepie & Hepie
    in album: De Grootste Hits Van...
      type: MusicAlbum
      date published: 2007-11-29
    genre: nederpop
    genre: polka
    isrc code: NLN350700019
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-06T00:36:42+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x250c4a4e936d24e01274c64cfe049fd87bf788687e2ee553e4b476fa133a8e55
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956856
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956856
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLN350700019
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-06T01:25:57Z
    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
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x250c4a4e936d24e01274c64cfe049fd87bf788687e2ee553e4b476fa133a8e55. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NLN350700019.
      date published: 2026-07-06T01:25:57Z
    audio: Ons Dorp
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 96.96
      additional property: Musical Key
        type: PropertyValue
        value: 2
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
      additional property: Danceability
      additional property: Energy
      additional property: Speechiness
      additional property: Acousticness
      additional property: Instrumentalness
      additional property: Liveness
      additional property: Valence (Positivity)
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name
  track: Op het perron
  track: Jij was van mij
album: De Grootste Hits Van Hepie & Hepie
album: Favorieten Expres

Time Signature
type: PropertyValue
value: 4

Danceability
type: PropertyValue
value: 0.644

Energy
type: PropertyValue
value: 0.543

Speechiness
type: PropertyValue
value: 0.024

Acousticness
type: PropertyValue
value: 0.608

Instrumentalness
type: PropertyValue
value: 0

Liveness
type: PropertyValue
value: 0.268

Valence (Positivity)
type: PropertyValue
value: 0.736

Loudness (dB)
type: PropertyValue
value: -6.362

Key Name
type: PropertyValue
value: D

Mode Name
type: PropertyValue
value: Major

Op het perron
type: MusicRecording
duration: PT5M1S
duration ms: 301000
explicit: false
by artist: Hepie & Hepie
in album: De Grootste Hits Van...
  type: MusicAlbum
  date published: 2007-11-29
genre: nederpop
genre: polka
isrc code: NLN350700057
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-18T07:01:11+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x2176c3aadaac5568a7c01788bf0e12e4dc7aaa1d0a32f7440ea9aed3bd33744f
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958520
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/958520
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLN350700057
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-18T08:19:09Z
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2176c3aadaac5568a7c01788bf0e12e4dc7aaa1d0a32f7440ea9aed3bd33744f. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/NLN350700057.
  date published: 2026-07-18T08:19:09Z
audio: Op het perron
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 133.686
  additional property: Musical Key
    type: PropertyValue
    value: 7
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.387
  additional property: Energy
    type: PropertyValue
    value: 0.528
  additional property: Speechiness
    type: PropertyValue
    value: 0.03
  additional property: Acousticness
    type: PropertyValue
    value: 0.27
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.25
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.435
  additional property: Loudness (dB)
    type: PropertyValue
    value: -7.445
  additional property: Key Name
    type: PropertyValue
    value: G
  additional property: Mode Name
    type: PropertyValue
    value: Major

Jij was van mij
type: MusicRecording
duration: PT2M54S
duration ms: 174000
explicit: false
by artist: Hepie & Hepie
in album: De Grootste Hits Van...
  type: MusicAlbum
  date published: 2007-11-29
genre: nederpop
genre: polka
isrc code: NLN350700058
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-15T16:59:08+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x6c20c8c3ede2526ec90d388ffc04527666312037ca7556d6195f52d8abdcd36a
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958176
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/958176
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLN350700058
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-15T20:01:15Z
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c20c8c3ede2526ec90d388ffc04527666312037ca7556d6195f52d8abdcd36a. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:01:15Z), 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/NLN350700058.
  date published: 2026-07-15T20:01:15Z
audio: Jij was van mij
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 184.916
  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: 0.548
  additional property: Energy
    type: PropertyValue
    value: 0.663
  additional property: Speechiness
    type: PropertyValue
    value: 0.03
  additional property: Acousticness
    type: PropertyValue
    value: 0.217
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.144
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.959
  additional property: Loudness (dB)
    type: PropertyValue
    value: -7.689
  additional property: Key Name
    type: PropertyValue
    value: Bb
  additional property: Mode Name
    type: PropertyValue
    value: Major

De Grootste Hits Van Hepie & Hepie
type: MusicAlbum
date published: 2007-11-29

Favorieten Expres
type: MusicAlbum
date published: 2020-01-31
track: Ik Lig Op Mijn Kussen Stil Te Dromen
  type: MusicRecording
  duration: PT3M21S
  duration ms: 201186
  explicit: false
  by artist: Hepie & Hepie
  in album: Favorieten Expres
    type: MusicAlbum
    date published: 2020-01-31
  genre: nederpop
  genre: polka
  isrc code: NLA308000017
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-03T03:56:15+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xeb134749a548bac7f48d37eef58ea583b11aee4bef0b845524c3e779ea5feffc
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956484
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956484
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA308000017
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-03T10:47:44Z
  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
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb134749a548bac7f48d37eef58ea583b11aee4bef0b845524c3e779ea5feffc. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/NLA308000017.
    date published: 2026-07-03T10:47:44Z
  audio: Ik Lig Op Mijn Kussen Stil Te Dromen
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 114.892
    additional property: Musical Key
      type: PropertyValue
      value: 7
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.484
    additional property: Energy
      type: PropertyValue
      value: 0.636
    additional property: Speechiness
      type: PropertyValue
      value: 0.028
    additional property: Acousticness
      type: PropertyValue
      value: 0.031
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.284
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.606
    additional property: Loudness (dB)
      type: PropertyValue
      value: -6.774
    additional property: Key Name
      type: PropertyValue
      value: G
    additional property: Mode Name
      type: PropertyValue
      value: Major