Fiorentino
type: MusicGroup
genre: tango
description: Fiorentino (Romagnol: Fiurentêin) is one of the nine castelli of San Marino. It occupies an area of and is the fourth smallest castello in the country by land area. As of 2023, it had a population of
popularity: 2
followers: 210
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additional property: OTSVerifyInstructions
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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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  date published: 2026-06-21T03:45:44Z
album: Fight for Hype
  type: MusicAlbum
  date published: 2019-08-26
album: Solito
  type: MusicAlbum
  date published: 2020-01-14
album: Moño
  type: MusicAlbum
  date published: 2020-02-01
track: Pedacito De Cielo
  type: MusicRecording
  duration: PT2M48S
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  explicit: false
  by artist: Aníbal Troilo
  by artist: Fiorentino
  in album: 50 Tangazos
    type: MusicAlbum
    date published: 2008-01-01
  popularity: 4
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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 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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    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ae69154e8326925f85bd23950b30564b5cf14dedf040d58cd9ae4393d3a5bd. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ART340900182 — a six-check JSON result.
    date published: 2026-07-30T12:51:24Z
  audio: Pedacito De Cielo
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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: Valence (Positivity)
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track: El Bulín de la Calle Ayacucho
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  duration: PT2M29S
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  by artist: Aníbal Troilo
  by artist: Fiorentino
  in album: Tangos Clásicos Vol. 1
    type: MusicAlbum
    date published: 2013-10-21
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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: 2026-07-30T14:44:50Z
  audio: El Bulín de la Calle Ayacucho
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track: Valsecito amigo
track: Rey de Copas

Liveness
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Valence (Positivity)
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Loudness (dB)
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value: -16.564

Key Name
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value: B

Mode Name
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value: Minor

Valsecito amigo
type: MusicRecording
duration: PT2M25S
duration ms: 145666
explicit: false
by artist: Aníbal Troilo
by artist: Fiorentino
in album: Valsecito Amigo (Valsecitos Vol. 2)
  type: MusicAlbum
  date published: 2001-09-24
isrc code: DEN720100267
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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
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e372b54485f9eba37db4ac33a19165788e955999bdb68f0e6cab3c59d4abb82. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN720100267 — a six-check JSON result.
  date published: 2026-07-31T02:51:48Z
audio: Valsecito amigo
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  additional property: Danceability
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Rey de Copas
type: MusicRecording
duration: PT2M59S
duration ms: 179053
explicit: false
by artist: JUAN C. COBIAN
by artist: Fiorentino
in album: Tango Legends Vol. 10: Great Orchestras
  type: MusicAlbum
  date published: 2011-12-01
isrc code: ARF411101379
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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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 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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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e08db4a68b63f6561b1411a43749e63e3dc9ab62cf82b7b498826abfceae66. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF411101379 — a six-check JSON result.
  date published: 2026-07-30T17:23:26Z
audio: Rey de Copas
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  additional property: Danceability
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