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followers: 127
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  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
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album: The Neapolitans: Instrumental Music of 18th-Century Naples
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  date published: 2001-11-01
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    by artist: Elizabeth Wallfisch
    by artist: Nicholas Kraemer
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      date published: 2001-11-01
    popularity: 14
    genre: baroque
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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
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      date published: 2026-07-08T03:20:19Z
    audio: Concerto No. 8 in A Major "La Pazzia": II. Affettuoso
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album: Tartini: Violin Concertos
  type: MusicAlbum
  date published: 2003-06-01
album: Vivaldi: Il cimento dell'armonia e dell'inventione, Op. 8 & La cetra, Op. 9
  type: MusicAlbum
  date published: 2003-01-01
album: Locatelli: Concerti grossi, Op. 1
  type: MusicAlbum
  date published: 1995-07-01
album: Locatelli: L'Arte del Violino – 12 Concertos, Op. 3
  type: MusicAlbum
  date published: 1994-04-01
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      type: MusicAlbum
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    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-07-07T16:54:37Z
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  track: Vivaldi: The Four Seasons, Violin Concerto in G Minor, Op. 8 No. 2, RV 315 "Summer": III. Presto
  track: Vivaldi: Violin Concerto in C Major, Op. 8 No. 12, RV 178: I. Allegro
  track: Vivaldi: Violin Concerto in C Major, Op. 8 No. 12, RV 178: II. Largo
  track: Vivaldi: Concerto for Violin and Cello in A Major, RV 546 "All'inglese": II. Andante
album: Locatelli: Sonatas (Overtures & Concertos), Op. 4
track: Vivaldi: The Four Seasons, Violin Concerto in F Minor, Op. 8 No. 4, RV 297 "Winter": II. Largo
track: The Four Seasons (from Il cimento dell'armonia e dell'inventione Op.8): Concerto No. 2 in G minor (L'estate/ Summer) RV315 (Op. 8 No. 2)
track: Violin Concerto in C Minor, RV 198a: I. Allegro
track: Vivaldi: The Four Seasons, Violin Concerto in F Major, Op. 8 No. 3, RV 293 "Autumn": I. Allegro
track: Vivaldi: The Four Seasons, Violin Concerto in F Major, Op. 8 No. 3, RV 293 "Autumn": II. Adagio molto
track: Vivaldi: The Four Seasons, Violin Concerto in F Major, Op. 8 No. 3, RV 293 "Autumn": III. Allegro "La caccia"
track: Violin Concerto in A Major, RV 345: I. Allegro
track: Largo
track: II. Andante
track: II. Adagio

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by artist: Monica Huggett
by artist: Raglan Baroque Players
by artist: Nicholas Kraemer
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  date published: 1990-01-01
genre: classical
genre: early-music
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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
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  date published: 2026-07-08T03:20:19Z
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Vivaldi: Violin Concerto in C Major, Op. 8 No. 12, RV 178: I. Allegro
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duration: PT3M3S
duration ms: 183346
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by artist: Antonio Vivaldi
by artist: Monica Huggett
by artist: Raglan Baroque Players
by artist: Nicholas Kraemer
in album: Vivaldi: Il cimento dell`armonia e dell`inventione, Op. 8
  type: MusicAlbum
  date published: 1990-01-01
genre: classical
genre: early-music
genre: baroque
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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
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  date published: 2026-08-01T01:44:32Z
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Vivaldi: Violin Concerto in C Major, Op. 8 No. 12, RV 178: II. Largo
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T17:29:52Z
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Vivaldi: Concerto for Violin and Cello in A Major, RV 546 "All'inglese": II. Andante
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by artist: Nicholas Kraemer
by artist: Timothy Mason
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T17:29:52Z
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Locatelli: Sonatas (Overtures & Concertos), Op. 4
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Vivaldi: The Four Seasons, Violin Concerto in F Minor, Op. 8 No. 4, RV 297 "Winter": II. Largo
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T06:42:11Z
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The Four Seasons (from Il cimento dell'armonia e dell'inventione Op.8): Concerto No. 2 in G minor (L'estate/ Summer) RV315 (Op. 8 No. 2)
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
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Violin Concerto in C Minor, RV 198a: I. Allegro
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by artist: Raglan Baroque Players
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T00:26:26Z
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Vivaldi: The Four Seasons, Violin Concerto in F Major, Op. 8 No. 3, RV 293 "Autumn": I. Allegro
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-30T02:21:55Z
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Vivaldi: The Four Seasons, Violin Concerto in F Major, Op. 8 No. 3, RV 293 "Autumn": II. Adagio molto
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-30T14:36:16Z
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Vivaldi: The Four Seasons, Violin Concerto in F Major, Op. 8 No. 3, RV 293 "Autumn": III. Allegro "La caccia"
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-30T08:30:10Z
audio: Vivaldi: The Four Seasons, Violin Concerto in F Major, Op. 8 No. 3, RV 293 "Autumn": III. Allegro "La caccia"
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Violin Concerto in A Major, RV 345: I. Allegro
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by artist: Nicholas Kraemer
by artist: Raglan Baroque Players
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
audio: Violin Concerto in A Major, RV 345: I. Allegro
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Largo
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duration: PT2M49S
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by artist: Antonio Vivaldi
by artist: Monica Huggett
by artist: Raglan Baroque Players
by artist: Nicholas Kraemer
in album: The Most Relaxing Vivaldi Album In The World... Ever!
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popularity: 1
genre: classical
genre: early-music
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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
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  date published: 2026-07-31T02:19:15Z
audio: Largo
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II. Andante
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by artist: Monica Huggett
by artist: Timothy Mason
by artist: Raglan Baroque Players
by artist: Nicholas Kraemer
in album: The Most Relaxing Vivaldi Album In The World... Ever!
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popularity: 1
genre: classical
genre: early-music
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T15:20:15Z
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II. Adagio
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T12:24:41Z
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