Spring Music
type: MusicGroup
genre: avant-garde
popularity: 17
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-06-15T11:57:35Z
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album: Frédéric Chopin - selected piano music
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  date published: 2019-02-27
  track: Chopin Mazurka op. 67 no. 3
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      date published: 2019-02-27
    genre: avant-garde
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    additional property: OTSVerifyInstructions
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    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-07-05T10:59:37Z
    audio: Chopin Mazurka op. 67 no. 3
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  track: Prelude op. 28 no. 11
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    genre: avant-garde
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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
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      date published: 2026-07-05T19:27:56Z
    audio: Prelude op. 28 no. 11
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album: Chopin Mazurka Op.7 No.4 in A Flat Major
album: Chopin: Prelude in F Minor op. 28 no. 18
album: J.S. Bach: Invention No. 13 in A Minor, BWV 784
album: Sonata in C Major, K.330, 1st Mov.
album: Pavane for Dead Princess
album: Fugue in C Major BWV 846, Das Wohltemperierte Klavier
album: Invention in B Flat Major, BWV 785
album: Mozart: Burlesque
album: Childhood Memories: Classical Composers
album: Children's Carnaval
album: Serene Tunes for Dog Relaxation
album: Melodic Canvas: Colors of Sound Unfold
album: Nursery Melodies: Baby’s Daily Harmony
album: Cat Calm: Soothing Sounds
album: Quiet Harmony: Soft Music for Peaceful Thoughts
album: Soft Melodies: Gentle Moments in Music
album: Yoga Flow: Music for Centered Energy

Loudness (dB)
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Key Name
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Mode Name
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Chopin Mazurka Op.7 No.4 in A Flat Major
type: MusicAlbum
date published: 2019-03-06

Chopin: Prelude in F Minor op. 28 no. 18
type: MusicAlbum
date published: 2019-03-13

J.S. Bach: Invention No. 13 in A Minor, BWV 784
type: MusicAlbum
date published: 2019-05-14

Sonata in C Major, K.330, 1st Mov.
type: MusicAlbum
date published: 2019-05-15

Pavane for Dead Princess
type: MusicAlbum
date published: 2019-05-16

Fugue in C Major BWV 846, Das Wohltemperierte Klavier
type: MusicAlbum
date published: 2019-05-20

Pavane for Dead Princess
type: MusicAlbum
date published: 2019-05-23

Invention in B Flat Major, BWV 785
type: MusicAlbum
date published: 2019-06-14

Mozart: Burlesque
type: MusicAlbum
date published: 2019-06-15

Mozart: Burlesque
type: MusicAlbum
date published: 2019-06-22

Childhood Memories: Classical Composers
type: MusicAlbum
date published: 2020-06-19
track: Bach: Invention in B Flat Major, BWV 785
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    date published: 2020-06-19
  genre: avant-garde
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-21T15:10:34Z
  audio: Bach: Invention in B Flat Major, BWV 785
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track: Chopin: Prelude Op.28 No.11 in B Major
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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
  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-05T04:47:21Z
  audio: Chopin: Prelude Op.28 No.11 in B Major
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Children's Carnaval
type: MusicAlbum
date published: 2022-08-05

Serene Tunes for Dog Relaxation
type: MusicAlbum
date published: 2024-10-22

Melodic Canvas: Colors of Sound Unfold
type: MusicAlbum
date published: 2024-11-19

Nursery Melodies: Baby’s Daily Harmony
type: MusicAlbum
date published: 2024-12-03

Cat Calm: Soothing Sounds
type: MusicAlbum
date published: 2024-12-31

Quiet Harmony: Soft Music for Peaceful Thoughts
type: MusicAlbum
date published: 2025-02-01

Soft Melodies: Gentle Moments in Music
type: MusicAlbum
date published: 2025-03-03

Yoga Flow: Music for Centered Energy
type: MusicAlbum
date published: 2025-04-02