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description: thumb|right|Lutenist Rafaelle Calace holding a liuto canabile. This photo was taken by 1901 and was featured in Samuel Adelstein's book Mandolin Memories, printed that year. Raffaele Calace (1863 – 1
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  track: Chamber Concerto in D Major, RV 93: III. Allegro
  track: Concerto for Mandolin No. 2 in A Minor, Op. 144: I. Maestoso
  track: Concerto for Mandolin No. 2 in A Minor, Op. 144: II. Largo mesto
  track: Concerto for Mandolin No. 2 in A Minor, Op. 144: III. Allegro non troppo
  track: Mandolin Concerto in C Major, RV 425: I. Allegro
  track: Mandolin Concerto in C Major, RV 425: II. Largo
  track: Mandolin Concerto in C Major, RV 425: III. —
album: Peaceful Mandolin
album: Delicate Delights: Best Loved Classical Mandolin & Lute Music
album: O sole mio: Mandolin Concertos & Songs
album: Massalia concerto
album: Mattinata : 3 pezzi popolari
album: Mosaïque
album: Soundscapes, Vol. 1
album: Calace: Mandolin Concertos Nos. 1 and 2 / Rhapsodia Napoletana
album: Captain Corelli's Mandolin
album: Music for Mandolin
album: Mosaik - Mandoline Solo
album: Raffaele Calace: 10 Preludes
album: Calace: Complete Guitar Works
album: Raffaele Calace: Duets for Mandolin and Guitar
album: Raffaele Calace: 10 Preludes For Solo Mandolin
album: Calace: Music for Mandolin Quartet
album: Calace: Complete Works for Mandolin & Guitar
album: Raffaele Calace: Le Opere Per Quartetto E Orchestra A Plettro
album: Gran Preludio / R. Calace
album: Polonese (R. Calace, Op. 36)
album: Notturno Cielo Stellato for Solo Mandolin, Op. 186
album: Raffaele Calace: Barcarola per liuto cantabile, Op. 116
album: Paradis latin
album: BMO 002 Brasschaats Mandoline Orkest olv Marcel De Cauwer
album: Munier & Calace: Works for Two Mandolins, Mandola and Guitar
album: Serenata Veneziana with Mandolin
album: 20th Century Italian Chamber Music with Mandolin
album: Mandolin & Japan: Incontro Casuale
album: Vogt, Edelmann & Blettenberg: Journey
album: new line
album: Duo Capriccioso Vol. 3
album: A Mandolin's Guide to Hamburg
album: Oh, That's Mandoline
album: Dal barocco al jazz
album: Vol. 6: Romance & Passion
album: Fusion
album: Werke für Gitarre und Mandoline
album: Impresiones (Acoustic)
album: Rapsodia Napoletana

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Chamber Concerto in D Major, RV 93: III. Allegro
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Mandolin Concerto in C Major, RV 425: III. —
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Peaceful Mandolin
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Delicate Delights: Best Loved Classical Mandolin & Lute Music
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O sole mio: Mandolin Concertos & Songs
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Massalia concerto
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Mattinata : 3 pezzi popolari
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Mosaïque
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Soundscapes, Vol. 1
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Calace: Mandolin Concertos Nos. 1 and 2 / Rhapsodia Napoletana
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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
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
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    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb383415dd480ca6daf558212b12d3c035ad61a5e100c364a5649b6608a96f1. 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/USCGH2273596.
    date published: 2026-07-02T03:55:08Z
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track: Serenata Gaia, Op. 75
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  by artist: Bulent Yazici
  by artist: Ender Bilge
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  additional property: OTSBitcoinBlockVerifyURL
  additional property: OTSVerificationAPI
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: Serenata Gaia, Op. 75

OTSHash
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OTSBitcoinBlock
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value: 956304

OTSBitcoinBlockVerifyURL
type: PropertyValue
value: https://blockstream.info/api/block-height/956304

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGH2273602

OTSTimestamp
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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 0xba17e9b5cf2514eb14e9ce7650a35f7107fd26018470f0502472d90b01a87a38. 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/USCGH2273602.
date published: 2026-07-02T03:55:08Z

Serenata Gaia, Op. 75
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additional property: Mode (Major/Minor)
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additional property: Valence (Positivity)
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Raffaele Calace: 10 Preludes For Solo Mandolin
type: MusicAlbum
date published: 2020-11-02

Calace: Music for Mandolin Quartet
type: MusicAlbum
date published: 2017-07-28

Calace: Complete Works for Mandolin & Guitar
type: MusicAlbum
date published: 2014-09-02

Raffaele Calace: Le Opere Per Quartetto E Orchestra A Plettro
type: MusicAlbum
date published: 1997-01-01

Gran Preludio / R. Calace
type: MusicAlbum
date published: 2024-08-01

Polonese (R. Calace, Op. 36)
type: MusicAlbum
date published: 2021-07-30

Notturno Cielo Stellato for Solo Mandolin, Op. 186
type: MusicAlbum
date published: 2020-10-20

Raffaele Calace: Barcarola per liuto cantabile, Op. 116
type: MusicAlbum
date published: 2019-03-03
track: Raffaele Calace: Barcarola per liuto cantabile, Op. 116
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  duration ms: 259750
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  by artist: Raffaele Calace
  by artist: Luca Natale
  in album: Raffaele Calace: Barcarola per liuto cantabile, Op. 116
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    date published: 2019-03-03
  genre: classical-mandolin
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  additional property: OTSVerificationAPI
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    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZSR42101660
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-07T18:39:05Z
  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
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    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9b54e7362c808e60e185c5eb689ed0c6b5309dbe67fdcbe372e0f548a3a201. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZSR42101660.
    date published: 2026-07-07T18:39:05Z
  audio: Raffaele Calace: Barcarola per liuto cantabile, Op. 116
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    additional property: Tempo (BPM)
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    additional property: Musical Key
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    additional property: Mode (Major/Minor)
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    additional property: Time Signature
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    additional property: Danceability
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    additional property: Energy
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    additional property: Speechiness
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    additional property: Acousticness
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    additional property: Liveness
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    additional property: Valence (Positivity)
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    additional property: Loudness (dB)
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Paradis latin
type: MusicAlbum
date published: 2016-05-13
track: Czardas
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  by artist: Julien Martineau
  by artist: Eric Franceries
  by artist: Yann Dubost
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  additional property: OTSBitcoinBlock
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  additional property: OTSBitcoinBlockVerifyURL
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  additional property: OTSVerificationAPI
    type: PropertyValue
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  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-29T19:35:34Z
  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 0xddfce4947a61777f02a339b8fbbf1ea905b92bce3096d562af4245d0bd787462. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FRZ131601010.
    date published: 2026-07-29T19:35:34Z
  audio: Czardas
    type: AudioObject
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    additional property: Musical Key
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    additional property: Mode (Major/Minor)
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    additional property: Time Signature
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    additional property: Danceability
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    additional property: Speechiness
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track: Tarantella, Op. 18
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  by artist: Julien Martineau
  by artist: Eric Franceries
  by artist: Yann Dubost
  in album: Paradis latin
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    date published: 2016-05-13
  genre: classical-mandolin
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  additional property: OTSBitcoinBlock
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  additional property: OTSVerificationAPI
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  additional property: OTSTimestamp
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  additional property: 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
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
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    date published: 2026-07-08T03:20:19Z
  audio: Tarantella, Op. 18
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    additional property: Mode (Major/Minor)
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    additional property: Time Signature
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    additional property: Danceability
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    additional property: Valence (Positivity)
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track: Bolero, Op. 26
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  duration: PT2M8S
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  by artist: Raffaele Calace
  by artist: Julien Martineau
  by artist: Eric Franceries
  by artist: Yann Dubost
  in album: Paradis latin
    type: MusicAlbum
    date published: 2016-05-13
  genre: classical-mandolin
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  additional property: CopyrightChainExplorerURL
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  additional property: OTSVerificationAPI
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: Bolero, Op. 26

OTSHash
type: PropertyValue

OTSBitcoinBlock
type: PropertyValue
value: 957118

OTSBitcoinBlockVerifyURL
type: PropertyValue
value: https://blockstream.info/api/block-height/957118

OTSVerificationAPI
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OTSTimestamp
type: PropertyValue
value: 2026-07-08T03:20:19Z

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 0xc90f5f9325734e11caba0a77a31708ffcf2fb1fb6e95084e479f97cdfffe1c8b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRZ131601080.
date published: 2026-07-08T03:20:19Z

Bolero, Op. 26
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
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additional property: Musical Key
  type: PropertyValue
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additional property: Mode (Major/Minor)
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additional property: Time Signature
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additional property: Danceability
  type: PropertyValue
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additional property: Energy
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additional property: Speechiness
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additional property: Acousticness
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additional property: Instrumentalness
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additional property: Liveness
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additional property: Valence (Positivity)
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additional property: Loudness (dB)
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additional property: Key Name
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additional property: Mode Name
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BMO 002 Brasschaats Mandoline Orkest olv Marcel De Cauwer
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date published: 1997
track: The Song of Japanese Autumn
  type: MusicRecording
  duration: PT12M12S
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  by artist: Yasuo Kuwahara
  by artist: Brasschaats Mandoline Orkest
  by artist: Marcel De Cauwer
  in album: BMO 002 Brasschaats Mandoline Orkest olv Marcel De Cauwer
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  additional property: CopyrightRegisteredAt
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  additional property: CopyrightChainExplorerURL
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  additional property: OTSBitcoinBlock
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  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/957118
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATR981168735
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-08T03:20:19Z
  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 0x3c81315a2998d50cf47ae6f38dafb4d1e38e89c0c79940f79e9cc4889fe2fc20. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ATR981168735.
    date published: 2026-07-08T03:20:19Z
  audio: The Song of Japanese Autumn
    type: AudioObject
    additional property: Tempo (BPM)
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    additional property: Musical Key
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    additional property: Mode (Major/Minor)
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Serenata Veneziana with Mandolin
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20th Century Italian Chamber Music with Mandolin
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Mandolin & Japan: Incontro Casuale
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Vogt, Edelmann & Blettenberg: Journey
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new line
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Duo Capriccioso Vol. 3
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A Mandolin's Guide to Hamburg
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Oh, That's Mandoline
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Dal barocco al jazz
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Vol. 6: Romance & Passion
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Fusion
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Werke für Gitarre und Mandoline
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Impresiones (Acoustic)
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Rapsodia Napoletana
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