Aprelstein
type: MusicGroup
genre: classical piano
popularity: 28
followers: 1421
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xca0989040f0896076e0e5dfa5649192864ed095c5a71409696f8cbe5dc22c6c0
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/bdf0381b-4257-42bc-8e85-a361689a2f40.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/bdf0381b-4257-42bc-8e85-a361689a2f40.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/bdf0381b-4257-42bc-8e85-a361689a2f40
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
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 0xca0989040f0896076e0e5dfa5649192864ed095c5a71409696f8cbe5dc22c6c0. 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/bdf0381b-4257-42bc-8e85-a361689a2f40.json and https://artists.proofprofile.net/proofs/artist/bdf0381b-4257-42bc-8e85-a361689a2f40.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T19:24:56Z
album: Imaginations
  type: MusicAlbum
  date published: 2021-04-23
album: Superpositions
  type: MusicAlbum
  date published: 2021-06-13
album: Movements
  type: MusicAlbum
  date published: 2021-10-29
album: Illuminations
  type: MusicAlbum
  date published: 2022-03-06
album: Superpositions
  type: MusicAlbum
  date published: 2022-03-08
album: Imaginations
  type: MusicAlbum
  date published: 2022-03-09
album: Movements
  type: MusicAlbum
  date published: 2022-03-10
  track: Movements No. I
    type: MusicRecording
    duration: PT4M31S
    duration ms: 271500
    explicit: false
    by artist: Aprelstein
    in album: Movements
      type: MusicAlbum
      date published: 2022-03-10
    genre: classical piano
    isrc code: QZES52242020
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-19T15:13:40+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x6dff5b8e9098cf95ae17278bd1558da23bb604c39b1740c07df178f3435796b8
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958746
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958746
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES52242020
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-19T15:36:35Z
    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 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 0x6dff5b8e9098cf95ae17278bd1558da23bb604c39b1740c07df178f3435796b8. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZES52242020.
      date published: 2026-07-19T15:36:35Z
    audio: Movements No. I
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 117.299
      additional property: Musical Key
        type: PropertyValue
        value: 1
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 3
      additional property: Danceability
        type: PropertyValue
        value: 0.349
      additional property: Energy
        type: PropertyValue
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      additional property: Speechiness
        type: PropertyValue
        value: 0.047
      additional property: Acousticness
        type: PropertyValue
        value: 0.967
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.863
      additional property: Liveness
        type: PropertyValue
        value: 0.094
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.279
      additional property: Loudness (dB)
        type: PropertyValue
        value: -18.62
      additional property: Key Name
        type: PropertyValue
        value: C#
      additional property: Mode Name
        type: PropertyValue
        value: Minor
  track: Movements No. II
    type: MusicRecording
    duration: PT5M3S
    duration ms: 303000
    explicit: false
    by artist: Aprelstein
    in album: Movements
      type: MusicAlbum
      date published: 2022-03-10
    genre: classical piano
    isrc code: QZES52242021
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-04T06:05:36+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x65136f5e395c698864095e2530e959d670db51f7f4823f389dbbe2b045919bb1
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956634
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956634
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES52242021
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-04T10:04:33Z
    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 0x65136f5e395c698864095e2530e959d670db51f7f4823f389dbbe2b045919bb1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZES52242021.
      date published: 2026-07-04T10:04:33Z
    audio: Movements No. II
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 83.031
      additional property: Musical Key
        type: PropertyValue
        value: 0
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 3
      additional property: Danceability
        type: PropertyValue
        value: 0.333
      additional property: Energy
        type: PropertyValue
        value: 0.127
      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
album: Variations No. I, Mozart: Alla Turca (Turkish March)
album: Perceptions
album: Variations No. II, Chopin: Minute Waltz
album: Variations No. III, Beethoven: Für Elise
album: Variations No. IV, Erik Satie: Gymnopédie No. 1
album: Preludes
album: Variations No. V, Grieg: Peer Gynt Suite No. 1, In the Hall of the Mountain King
album: Nocturne No. I, Illusions
album: Variations No. VI, Chopin: Fantaisie-Impromptu
album: Nocturne No. II, Simulations
album: Variations

Speechiness
type: PropertyValue
value: 0.045

Acousticness
type: PropertyValue
value: 0.975

Instrumentalness
type: PropertyValue
value: 0.823

Liveness
type: PropertyValue
value: 0.081

Valence (Positivity)
type: PropertyValue
value: 0.132

Loudness (dB)
type: PropertyValue
value: -20.639

Key Name
type: PropertyValue
value: C

Mode Name
type: PropertyValue
value: Minor

Variations No. I, Mozart: Alla Turca (Turkish March)
type: MusicAlbum
date published: 2022-09-13

Perceptions
type: MusicAlbum
date published: 2022-10-07
track: Perceptions No. I
  type: MusicRecording
  duration: PT4M57S
  duration ms: 297000
  explicit: false
  by artist: Aprelstein
  in album: Perceptions
    type: MusicAlbum
    date published: 2022-10-07
  genre: classical piano
  isrc code: QZPLS2210754
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-05T16:17:06+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x02792cb1c2b453df869ebb5821478e16c6b496f42c695804be9cc73a58b8e3a9
  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/QZPLS2210754
  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 0x02792cb1c2b453df869ebb5821478e16c6b496f42c695804be9cc73a58b8e3a9. 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/QZPLS2210754.
    date published: 2026-07-05T19:27:56Z
  audio: Perceptions No. I
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 75.21
    additional property: Musical Key
      type: PropertyValue
      value: 9
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.34
    additional property: Energy
      type: PropertyValue
      value: 0.062
    additional property: Speechiness
      type: PropertyValue
      value: 0.076
    additional property: Acousticness
      type: PropertyValue
      value: 0.973
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.865
    additional property: Liveness
      type: PropertyValue
      value: 0.137
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.164
    additional property: Loudness (dB)
      type: PropertyValue
      value: -18.252
    additional property: Key Name
      type: PropertyValue
      value: A
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: Perceptions No. II
  type: MusicRecording
  duration: PT3M40S
  duration ms: 220000
  explicit: false
  by artist: Aprelstein
  in album: Perceptions
    type: MusicAlbum
    date published: 2022-10-07
  genre: classical piano
  isrc code: QZPLS2210755
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-17T12:05:46+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xcd2a30e4f9f90985d0bfecbb6f0f2d9ea3c5f6eedc27a1fd6509f58b63a036a4
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958410
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958410
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPLS2210755
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-17T12:18:07Z
  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 0xcd2a30e4f9f90985d0bfecbb6f0f2d9ea3c5f6eedc27a1fd6509f58b63a036a4. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZPLS2210755.
    date published: 2026-07-17T12:18:07Z
  audio: Perceptions No. II
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 115.853
    additional property: Musical Key
      type: PropertyValue
      value: 5
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.464
    additional property: Energy
      type: PropertyValue
      value: 0.031
    additional property: Speechiness
      type: PropertyValue
      value: 0.05
    additional property: Acousticness
      type: PropertyValue
      value: 0.983
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.925
    additional property: Liveness
      type: PropertyValue
      value: 0.062
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.167
    additional property: Loudness (dB)
      type: PropertyValue
      value: -24.665
    additional property: Key Name
      type: PropertyValue
      value: F
    additional property: Mode Name
      type: PropertyValue
      value: Minor
track: Perceptions No. III
  type: MusicRecording
  duration: PT5M6S
  duration ms: 306000
  explicit: false
  by artist: Aprelstein
  in album: Perceptions
    type: MusicAlbum
    date published: 2022-10-07
  genre: classical piano
  isrc code: QZPLS2210756
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-04T17:57:15+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xa9b2fa79380bad942e03824f904cf8617c5382b783dd2df7f90f30918e9f4abb
  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
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: Perceptions No. III

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPLS2210756

OTSTimestamp
type: PropertyValue
value: 2026-07-05T01:12:41Z

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 0xa9b2fa79380bad942e03824f904cf8617c5382b783dd2df7f90f30918e9f4abb. 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/QZPLS2210756.
date published: 2026-07-05T01:12:41Z

Perceptions No. III
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 172.011
additional property: Musical Key
  type: PropertyValue
  value: 9
additional property: Mode (Major/Minor)
  type: PropertyValue
  value: 1
additional property: Time Signature
  type: PropertyValue
  value: 3
additional property: Danceability
  type: PropertyValue
  value: 0.435
additional property: Energy
  type: PropertyValue
  value: 0.019
additional property: Speechiness
  type: PropertyValue
  value: 0.068
additional property: Acousticness
  type: PropertyValue
  value: 0.985
additional property: Instrumentalness
  type: PropertyValue
  value: 0.899
additional property: Liveness
  type: PropertyValue
  value: 0.073
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.154
additional property: Loudness (dB)
  type: PropertyValue
  value: -26.103
additional property: Key Name
  type: PropertyValue
  value: A
additional property: Mode Name
  type: PropertyValue
  value: Major

Variations No. II, Chopin: Minute Waltz
type: MusicAlbum
date published: 2022-12-09
track: Variations No. II, Chopin: Minute Waltz
  type: MusicRecording
  duration: PT2M51S
  duration ms: 171000
  explicit: false
  by artist: Aprelstein
  in album: Variations No. II, Chopin: Minute Waltz
    type: MusicAlbum
    date published: 2022-12-09
  genre: classical piano
  isrc code: QZTAZ2226976
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-04T00:32:46+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x28f3a956991f878ac39d75cc81195c3f339a1e3baed8fa3997ac9a23b704642a
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956634
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956634
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAZ2226976
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-04T10:04:33Z
  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 0x28f3a956991f878ac39d75cc81195c3f339a1e3baed8fa3997ac9a23b704642a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTAZ2226976.
    date published: 2026-07-04T10:04:33Z
  audio: Variations No. II, Chopin: Minute Waltz
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 131.946
    additional property: Musical Key
      type: PropertyValue
      value: 3
    additional property: Mode (Major/Minor)
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Variations No. III, Beethoven: Für Elise
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-18T06:14:51Z
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Variations No. IV, Erik Satie: Gymnopédie No. 1
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Preludes
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-04T10:04:33Z
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-04T22:48:52Z
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  audio: Prelude No. IV
track: Prelude No. V

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OTSTimestamp
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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

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8853674001fb381acbc8e30ba57f05ea64a1598cda62d6704d32b314a904f1b6. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZHN92395981.
date published: 2026-07-16T02:28:43Z

Prelude No. IV
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Prelude No. V
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genre: classical piano
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-12T21:46:51Z
audio: Prelude No. V
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Variations No. V, Grieg: Peer Gynt Suite No. 1, In the Hall of the Mountain King
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-17T13:33:01Z
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Nocturne No. I, Illusions
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Variations No. VI, Chopin: Fantaisie-Impromptu
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