Maria Katzarava
type: MusicGroup
genre: opera
description: Maria Katzarava (born 1984) is an opera singer from Mexico who achieved international fame by winning first place in the Operalia competition in the opera and zarzuela categories. Prior to this, she c
popularity: 4
followers: 744
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additional property: CopyrightChainExplorerURL
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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
subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620195b7af85e7e050246bf9139a98877189d546cddca2bacdeff03f4c72deec. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a4b58e7f-f85b-4bc0-8613-3c510d69df90.json and https://artists.proofprofile.net/proofs/artist/a4b58e7f-f85b-4bc0-8613-3c510d69df90.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T08:57:02Z
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album: RECITAL MARIA KATZARAVA Y ANGEL RODRIGUEZ (Live)
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  date published: 2013-12-13
track: Milord
track: Sous le ciel de Paris
track: La vie en rose
track: Aida / Act 1: "Possente, possente Fthà"

Milord
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duration ms: 331000
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by artist: Orquesta Sinfónica del Atlántico
by artist: Isabel Costes
by artist: Maria Katzarava
in album: Hommage à Edith Piaf
  type: MusicAlbum
  date published: 2024-04-27
isrc code: GBMJG2411682
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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
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additional property: BitcoinTime
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subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd534d91db0b66d069f18f28de763d3627ecf7f37b9150fbd75661007099693a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBMJG2411682.
  date published: 2026-07-08T03:53:27Z
audio: Milord
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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: 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
    type: PropertyValue
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Sous le ciel de Paris
type: MusicRecording
duration: PT4M3S
duration ms: 243000
explicit: false
by artist: Orquesta Sinfónica del Atlántico
by artist: Isabel Costes
by artist: Maria Katzarava
in album: Hommage à Edith Piaf
  type: MusicAlbum
  date published: 2024-04-27
isrc code: GBMJG2411685
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additional property: CopyrightStatus
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec6c7cd65e536168cd01cf023b29f18dfd41616043691d29a42bc3a84b086c1. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBMJG2411685.
  date published: 2026-07-08T03:39:04Z
audio: Sous le ciel de Paris
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  additional property: Danceability
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La vie en rose
type: MusicRecording
duration: PT3M53S
duration ms: 233000
explicit: false
by artist: Orquesta Sinfónica del Atlántico
by artist: Isabel Costes
by artist: Maria Katzarava
by artist: José Carlos Campos
in album: Hommage à Edith Piaf
  type: MusicAlbum
  date published: 2024-04-27
isrc code: GBMJG2411687
additional property: CopyrightID
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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
additional property: ProofProfileEvidenceStatus
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additional property: TokenDeploymentConfirmed
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subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb56d27446fb15ca057deac48d041eba400e2123bc257ce56d1ca15c0dd8315. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBMJG2411687.
  date published: 2026-07-08T03:53:27Z
audio: La vie en rose
  type: AudioObject
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    type: PropertyValue
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  additional property: Speechiness
    type: PropertyValue
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Aida / Act 1: "Possente, possente Fthà"
type: MusicRecording
duration: PT5M44S
duration ms: 344929
explicit: false
by artist: Giuseppe Verdi
by artist: Maria Katzarava
by artist: Carlo Colombara
by artist: Coro del Maggio Musicale Fiorentino
by artist: Orchestra del Maggio Musicale Fiorentino
by artist: Zubin Mehta
in album: Verdi: Aida
  type: MusicAlbum
  date published: 2016-07-01
genre: classical
genre: opera
subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d73fe626f65b49368bb6afe4fcdae65dce1eb3094c2a2dad37b2a64a45f402. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:44:36Z), 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/ITZ041600022.
  date published: 2026-07-22T20:44:36Z
audio: Aida / Act 1: "Possente, possente Fthà"
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  additional property: Tempo (BPM)
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  additional property: Danceability
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  additional property: Acousticness
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  additional property: Instrumentalness
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  additional property: Key Name
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    value: Ab
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isrc code: ITZ041600022
additional property: CopyrightID
additional property: ProofProfileEvidenceStatus
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additional property: OTSVerificationAPI
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additional property: OTSHash
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additional property: OTSBitcoinBlockVerifyURL
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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