Joan Mas
type: MusicGroup
genre: singer-songwriter
description: right|thumb|250px|Gent (1980), oil on canvas. right|thumb|250px|Mediterrania (2002), oil on canvas. Joan Mas i Ramon (Barcelona, 1934) is a Post-Impressionist style fine artist based at Barcelona and
popularity: 6
followers: 101
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additional property: CopyrightChainExplorerURL
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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
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x183143a45e20479ab55eab9a4539870ab10a48047be33ff03cbcd45172126c9f. Chain 2 (Bitcoin): anchored in block 953857 (2026-06-15T23:34:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/022bf14c-5e46-4061-a3a7-e6d6b023e753.json and https://artists.proofprofile.net/proofs/artist/022bf14c-5e46-4061-a3a7-e6d6b023e753.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T23:34:38Z
  text: {"copyright_id":"0x183143a45e20479ab55eab9a4539870ab10a48047be33ff03cbcd45172126c9f","name":"Joan Mas","registered_at":"2026-06-15T14:25:44Z","symbol":"NIM0736342","token_address":"0x9b6e24735b19bb1cf83d0c706b03f955f3a12489","type":"artist","uuid":"022bf14c-5e46-4061-a3a7-e6d6b023e753"}
album: Cançons pel Silenci
  type: MusicAlbum
  date published: 1992
album: Sentir/Sentir
  type: MusicAlbum
  date published: 2003-01-01
album: Lluny de les ombres
  type: MusicAlbum
  date published: 2006-01-01
album: En la Esquina del Cielo
  type: MusicAlbum
  date published: 2011-01-01
album: Recital al Palau de la Música (En Vivo)
  type: MusicAlbum
  date published: 2011-09-19
album: Un únic Món un únic Cel
  type: MusicAlbum
  date published: 2016-01-01
album: Vals Per Adriana
  type: MusicAlbum
  date published: 2018-09-01
album: El Amor Que Yo Espero
  type: MusicAlbum
  date published: 2019-01-01
album: Qui Ha Robat la Primavera (En Directe)
  type: MusicAlbum
  date published: 2020-12-01
album: La Nit de Sant Joan
  type: MusicAlbum
  date published: 2021-06-23
album: Bons a Morir (Blues Per a Joan Vinyals)
  type: MusicAlbum
  date published: 2022-07-29
album: Retorn
  type: MusicAlbum
  date published: 2022-12-22
album: Llum Blaugrana
  type: MusicAlbum
  date published: 2025-03-10
  track: Llum Blaugrana
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    duration ms: 124800
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    by artist: Joan Mas
    in album: Llum Blaugrana
      type: MusicAlbum
      date published: 2025-03-10
    genre: singer-songwriter
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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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      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x730b4b2de57ce439002a0578b50deeb84535a1b15e48fb8b98ba9bb82ca5256e. 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/ES86D2500535.
      date published: 2026-07-04T10:04:33Z
    audio: Llum Blaugrana
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 75.226
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        value: 1
      additional property: Mode (Major/Minor)
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        value: 1
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      additional property: Danceability
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      additional property: Instrumentalness
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      additional property: Valence (Positivity)
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        value: -4.059
      additional property: Key Name
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        value: C#
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        type: PropertyValue
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album: La noia del carrer
  type: MusicAlbum
  date published: 2025-03-10
  track: La noia del carrer
    type: MusicRecording
    duration: PT4M27S
    duration ms: 267540
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    by artist: Joan Mas
    in album: La noia del carrer
      type: MusicAlbum
      date published: 2025-03-10
    genre: singer-songwriter
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    additional property: OTSTimestamp
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    additional property: OTSVerifyInstructions
    subject of: OpenTimestamps Proof of Existence
    audio: La noia del carrer
album: Et volia escriure un Vals
album: El poder
album: Petit poema d'un poble

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 0xb7b19ce211166604705814f8922e29afde033361e767a0e32d21099392b5a6a4. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/ES86D2500534.
date published: 2026-07-20T17:53:56Z

La noia del carrer
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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  value: 0
additional property: Time Signature
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  value: 3
additional property: Danceability
  type: PropertyValue
  value: 0.615
additional property: Energy
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  value: 0.176
additional property: Speechiness
  type: PropertyValue
  value: 0.056
additional property: Acousticness
  type: PropertyValue
  value: 0.897
additional property: Instrumentalness
  type: PropertyValue
  value: 0
additional property: Liveness
  type: PropertyValue
  value: 0.09
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.275
additional property: Loudness (dB)
  type: PropertyValue
  value: -14.421
additional property: Key Name
  type: PropertyValue
  value: D
additional property: Mode Name
  type: PropertyValue
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Et volia escriure un Vals
type: MusicAlbum
date published: 2025-03-10

El poder
type: MusicAlbum
date published: 2025-03-10

Petit poema d'un poble
type: MusicAlbum
date published: 2025-03-10