Tante Leen
type: MusicGroup
genre: nederpop
description: Tante Leen (English: Auntie Leen, January 28, 1912 — August 5, 1992), real name Helena Kok-Polder, later Helena Jansen-Polder, was a Dutch folk singer from Amsterdam, Netherlands. Together with her fr
popularity: 27
followers: 5584
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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  value: https://explorer.copyrightchains.com/tx/0xdef8910c90cbc90d0655f3d2e50982aea4f5e8af351e497092e8538d9fb3b252
additional property: OTSHash
additional property: OTSBitcoinBlock
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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/b9168f6d-679f-4beb-8b26-bc40bba87358.ots
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/b9168f6d-679f-4beb-8b26-bc40bba87358
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef8910c90cbc90d0655f3d2e50982aea4f5e8af351e497092e8538d9fb3b252. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b9168f6d-679f-4beb-8b26-bc40bba87358.json and https://artists.proofprofile.net/proofs/artist/b9168f6d-679f-4beb-8b26-bc40bba87358.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T19:28:13Z
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album: De Beste Stemmen Van De Jordaan (Mono Version)
  type: MusicAlbum
  date published: 1957-01-01
album: Er Is Maar Eén Tante Leen (Remastered 2022)
  type: MusicAlbum
  date published: 1967-01-01
album: Dit Is Tante Leen (Remastered 2022)
  type: MusicAlbum
  date published: 1971-01-01
  track: Ik Gun Je Heus Je Borreltje Wel - Remastered 2022
    type: MusicRecording
    duration: PT2M27S
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    explicit: false
    by artist: Tante Leen
    in album: Dit Is Tante Leen (Remastered 2022)
      type: MusicAlbum
      date published: 1971-01-01
    genre: nederpop
    isrc code: NLUM72200641
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      type: PropertyValue
      value: registered
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      type: PropertyValue
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    additional property: OTSVerificationAPI
      type: PropertyValue
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    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
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
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      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a5befbdbd370fbb2c64f3e445b28008b2b4c2b44109446bc5ecd7876508c9c. 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/NLUM72200641.
      date published: 2026-07-05T19:27:56Z
    audio: Ik Gun Je Heus Je Borreltje Wel - Remastered 2022
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 128.995
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        type: PropertyValue
        value: 2
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
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      additional property: Energy
        type: PropertyValue
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      additional property: Speechiness
        type: PropertyValue
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      additional property: Acousticness
        type: PropertyValue
        value: 0.719
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.276
      additional property: Valence (Positivity)
        type: PropertyValue
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      additional property: Loudness (dB)
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      additional property: Key Name
        type: PropertyValue
        value: D
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Amsterdam En Ik
  type: MusicAlbum
  date published: 1972-01-01
  track: Rode Rozen Voor Mij
    type: MusicRecording
    duration: PT2M48S
    duration ms: 168706
    explicit: false
    by artist: Tante Leen
    in album: Amsterdam En Ik
      type: MusicAlbum
      date published: 1972-01-01
    genre: nederpop
    isrc code: NLA279503813
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    additional property: CopyrightStatus
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    additional property: OTSVerificationAPI
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      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA279503813
    additional property: OTSTimestamp
      type: PropertyValue
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    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 0xa19a5aa7dfb7e8badd311687ab9b463a7b28c96f61dc1bf71efaacb0a45ffc4c. 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/NLA279503813.
      date published: 2026-07-16T03:46:09Z
    audio: Rode Rozen Voor Mij
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 185.919
      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: 0.269
      additional property: Energy
        type: PropertyValue
        value: 0.406
      additional property: Speechiness
        type: PropertyValue
        value: 0.031
      additional property: Acousticness
      additional property: Instrumentalness
      additional property: Liveness
      additional property: Valence (Positivity)
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name
album: Alle Dagen Feest Nr. 2
album: Hollandse Sterren Collectie
album: Alle 40 Goed
album: Diep In Mijn Hart En Andere Parels...
album: Favorieten Expres
album: Het Beste Van (Remastered)
album: Parels van de Jordaan
album: De Beste Stem Van De Jordaan
album: Singles & B-kanten

Acousticness
type: PropertyValue
value: 0.593

Instrumentalness
type: PropertyValue
value: 0

Liveness
type: PropertyValue
value: 0.434

Valence (Positivity)
type: PropertyValue
value: 0.463

Loudness (dB)
type: PropertyValue
value: -10.629

Key Name
type: PropertyValue
value: G

Mode Name
type: PropertyValue
value: Major

Alle Dagen Feest Nr. 2
type: MusicAlbum
date published: 1976-01-01

Hollandse Sterren Collectie
type: MusicAlbum
date published: 2008-01-01

Alle 40 Goed
type: MusicAlbum
date published: 2010-01-01
track: Oh Johnny
  type: MusicRecording
  duration: PT3M8S
  duration ms: 188746
  explicit: false
  by artist: Tante Leen
  in album: Alle 40 Goed
    type: MusicAlbum
    date published: 2010-01-01
  genre: nederpop
  isrc code: NLA275600051
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-06T01:09:34+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xb696609025df52709a5117ccd4dcbaf472f9d920a393dd80e0db6a0959abebfb
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956856
  additional property: OTSBitcoinBlockVerifyURL
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    value: https://blockstream.info/api/block-height/956856
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA275600051
  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 0xb696609025df52709a5117ccd4dcbaf472f9d920a393dd80e0db6a0959abebfb. 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/NLA275600051.
    date published: 2026-07-06T01:25:57Z
  audio: Oh Johnny
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 95.218
    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: 0.592
    additional property: Energy
      type: PropertyValue
      value: 0.338
    additional property: Speechiness
      type: PropertyValue
      value: 0.026
    additional property: Acousticness
      type: PropertyValue
      value: 0.506
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.389
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.511
    additional property: Loudness (dB)
      type: PropertyValue
      value: -6.507
    additional property: Key Name
      type: PropertyValue
      value: G
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: Mijn Ouwe Amstelstad
  type: MusicRecording
  duration: PT3M33S
  duration ms: 213346
  explicit: false
  by artist: Tante Leen
  in album: Alle 40 Goed
    type: MusicAlbum
    date published: 2010-01-01
  genre: nederpop
  isrc code: NLA270600651
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-19T15:22:01+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xe5aa7014910826793b49d403aa54359f12bfcfeaf6fbfe1e858d5e245aa2c32c
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958749
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958749
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA270600651
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-19T18:24:47Z
  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 0xe5aa7014910826793b49d403aa54359f12bfcfeaf6fbfe1e858d5e245aa2c32c. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:24:47Z), 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/NLA270600651.
    date published: 2026-07-19T18:24:47Z
  audio: Mijn Ouwe Amstelstad
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
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    additional property: Musical Key
      type: PropertyValue
      value: 4
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 3
    additional property: Danceability
      type: PropertyValue
      value: 0.26
    additional property: Energy
      type: PropertyValue
      value: 0.345
    additional property: Speechiness
      type: PropertyValue
      value: 0.029
    additional property: Acousticness
      type: PropertyValue
      value: 0.591
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.715
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.735
    additional property: Loudness (dB)
      type: PropertyValue
      value: -9.697
    additional property: Key Name
      type: PropertyValue
      value: E
    additional property: Mode Name
      type: PropertyValue
      value: Major

Diep In Mijn Hart En Andere Parels...
type: MusicAlbum
date published: 2017-01-13
track: Mijn Man Is Ajaxied
  type: MusicRecording
  duration: PT2M26S
  duration ms: 146133
  explicit: false
  by artist: Tante Leen
  in album: Diep In Mijn Hart En Andere Parels...
    type: MusicAlbum
    date published: 2017-01-13
  genre: nederpop
  isrc code: NLUM71600792
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-15T16:10:10+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x08143fdd7ec5aaf092c545217dc2d798c8466d20726494426cf13020d55c093a
  additional property: OTSHash
  additional property: OTSBitcoinBlock
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  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/NLUM71600792
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-15T19:12:27Z
  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 0x08143fdd7ec5aaf092c545217dc2d798c8466d20726494426cf13020d55c093a. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:12:27Z), 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/NLUM71600792.
    date published: 2026-07-15T19:12:27Z
  audio: Mijn Man Is Ajaxied
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 121.461
    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: 0.75
    additional property: Energy
      type: PropertyValue
      value: 0.569
    additional property: Speechiness
      type: PropertyValue
      value: 0.077
    additional property: Acousticness
      type: PropertyValue
      value: 0.798
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.116
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.966
    additional property: Loudness (dB)
      type: PropertyValue
      value: -8.774
    additional property: Key Name
      type: PropertyValue
      value: G
    additional property: Mode Name
      type: PropertyValue
      value: Major

Favorieten Expres
type: MusicAlbum
date published: 2019-02-22

Het Beste Van (Remastered)
type: MusicAlbum
date published: 2019-10-11

Parels van de Jordaan
type: MusicAlbum
date published: 2022-03-10

De Beste Stem Van De Jordaan
type: MusicAlbum
date published: 2022-07-22

Singles & B-kanten
type: MusicAlbum
date published: 2022-10-28
track: De Duiven Op De Dam
  type: MusicRecording
  duration: PT2M3S
  duration ms: 123359
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  by artist: Tante Leen
  in album: Singles & B-kanten
    type: MusicAlbum
    date published: 2022-10-28
  genre: nederpop
  isrc code: NLUM71801010
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
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  additional property: CopyrightRegisteredAt
    type: PropertyValue
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  additional property: CopyrightChainExplorerURL
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  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLUM71801010
  additional property: OTSTimestamp
    type: PropertyValue
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  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 0x04f54138e0f1109cff59b6a84f6889dd62082a88e24c90e6b9b2e7b3f82f0874. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLUM71801010.
    date published: 2026-07-02T16:51:38Z
  audio: De Duiven Op De Dam
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