Hungarian People's Army Male Chorus
type: MusicGroup
genre: opera
popularity: 8
followers: 11
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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  value: https://explorer.copyrightchains.com/tx/0xe880177606c9a659bc48ff8171610c7944cd390b1271ca2dea96a9b4b5c48faa
additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
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additional property: OTSProofURL
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additional property: OTSRecordURL
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additional property: OTSVerificationAPI
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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
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-06-17T08:11:48Z
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track: Hunyadi Laszlo: Act I Scene 1: Cavatina: Halljatok most … Csak az, mit fajlal … (Listen … One thing my heart … ) (Matyas, Chorus)
track: Hunyadi Laszlo: Overture
track: Hunyadi Laszlo: Act I Scene 1: Chorus: Nem leszunk mi hu kutyai (We shall not be faithful hounds) (Chorus, Szilagyi Mihaly)
track: Hunyadi Laszlo: Act I Scene 1: Legy udvoz … (Welcome … ) (Chorus, Laszlo, Szilagyi Mihaly, Hadnagy, Lieutenant)

Hunyadi Laszlo: Act I Scene 1: Cavatina: Halljatok most … Csak az, mit fajlal … (Listen … One thing my heart … ) (Matyas, Chorus)
type: MusicRecording
duration: PT4M42S
duration ms: 282106
explicit: false
by artist: Ferenc Erkel
by artist: András Molnár
by artist: Istvan Gati
by artist: Sylvia Sass
by artist: Dénes Gulyás
by artist: Zsuzsanna Denes
by artist: Sandor Sòlyom-Nagy
by artist: Magda Kalmár
by artist: József Gregor
by artist: Miklos Mersei
by artist: Attila Fulop
by artist: Hungarian People's Army Male Chorus
by artist: Hungarian State Opera Chorus
by artist: Hungarian State Opera Orchestra
by artist: Janos Kovacs
in album: Erkel: Hunyadi Laszlo
  type: MusicAlbum
  date published: 2014-07-15
isrc code: HUA251258103
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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  value: https://explorer.copyrightchains.com/tx/0xba742230543a91d7d9e64d2579909f3534dbd22f62bef0b4d6acda403f3e58f9
additional property: OTSHash
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/HUA251258103
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:20:19+00:00
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
  type: PropertyValue
  value: verified-cc-db-prod
additional property: TokenDeploymentConfirmed
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  value: true
additional property: ContentHash
additional property: BitcoinBlock
  type: PropertyValue
  value: 957118
additional property: BitcoinTime
  type: PropertyValue
  value: 2026-07-08T03:20:19+00:00
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba742230543a91d7d9e64d2579909f3534dbd22f62bef0b4d6acda403f3e58f9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HUA251258103.
  date published: 2026-07-08T03:22:41Z
audio: Hunyadi Laszlo: Act I Scene 1: Cavatina: Halljatok most … Csak az, mit fajlal … (Listen … One thing my heart … ) (Matyas, Chorus)
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 166.712
  additional property: Musical Key
    type: PropertyValue
    value: 3
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.288
  additional property: Energy
    type: PropertyValue
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  additional property: Speechiness
    type: PropertyValue
    value: 0.085
  additional property: Acousticness
    type: PropertyValue
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  additional property: Instrumentalness
    type: PropertyValue
    value: 0.009
  additional property: Liveness
    type: PropertyValue
    value: 0.15
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.073
  additional property: Loudness (dB)
    type: PropertyValue
    value: -22.579
  additional property: Key Name
    type: PropertyValue
    value: Eb
  additional property: Mode Name
    type: PropertyValue
    value: Major

Hunyadi Laszlo: Overture
type: MusicRecording
duration: PT12M38S
duration ms: 758493
explicit: false
by artist: Ferenc Erkel
by artist: András Molnár
by artist: Istvan Gati
by artist: Sylvia Sass
by artist: Dénes Gulyás
by artist: Zsuzsanna Denes
by artist: Sandor Sòlyom-Nagy
by artist: Magda Kalmár
by artist: József Gregor
by artist: Miklos Mersei
by artist: Attila Fulop
by artist: Hungarian People's Army Male Chorus
by artist: Hungarian State Opera Chorus
by artist: Hungarian State Opera Orchestra
by artist: Janos Kovacs
in album: Erkel: Hunyadi Laszlo
  type: MusicAlbum
  date published: 2014-07-15
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b481da56261d8221ea26352ef87d5d64cbb22f1be2499801f4aa99d9eb70c5. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/HUA251258101.
  date published: 2026-07-30T02:21:55Z
audio: Hunyadi Laszlo: Overture
  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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  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.217
  additional property: Energy
    type: PropertyValue
    value: 0.141
  additional property: Speechiness
    type: PropertyValue
    value: 0.054
  additional property: Acousticness
    type: PropertyValue
    value: 0.874
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.372
  additional property: Liveness
    type: PropertyValue
    value: 0.049
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.097
  additional property: Loudness (dB)
    type: PropertyValue
    value: -22.741
  additional property: Key Name
    type: PropertyValue
    value: D
  additional property: Mode Name
    type: PropertyValue
    value: Minor
isrc code: HUA251258101
additional property: CopyrightID
additional property: ProofProfileEvidenceStatus
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  value: verified-cc-db-prod
additional property: TokenDeploymentConfirmed
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additional property: ContentHash
additional property: BitcoinBlock
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additional property: BitcoinTime
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additional property: OTSVerificationAPI
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  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUA251258101
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
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additional property: OTSBitcoinBlockVerifyURL
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  value: https://blockstream.info/api/block-height/960198
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-30T02:21:55+00:00
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

Hunyadi Laszlo: Act I Scene 1: Chorus: Nem leszunk mi hu kutyai (We shall not be faithful hounds) (Chorus, Szilagyi Mihaly)
type: MusicRecording
duration: PT3M8S
duration ms: 188000
explicit: false
by artist: Ferenc Erkel
by artist: András Molnár
by artist: Istvan Gati
by artist: Sylvia Sass
by artist: Dénes Gulyás
by artist: Zsuzsanna Denes
by artist: Sandor Sòlyom-Nagy
by artist: Magda Kalmár
by artist: József Gregor
by artist: Miklos Mersei
by artist: Attila Fulop
by artist: Hungarian People's Army Male Chorus
by artist: Hungarian State Opera Chorus
by artist: Hungarian State Opera Orchestra
by artist: Janos Kovacs
in album: Erkel: Hunyadi Laszlo
  type: MusicAlbum
  date published: 2014-07-15
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644fced0a3bd7477f2bb9d86d084d8fec24948e045cafeea71985ae064f68d8b. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/HUA251258102.
  date published: 2026-07-31T10:20:10Z
audio: Hunyadi Laszlo: Act I Scene 1: Chorus: Nem leszunk mi hu kutyai (We shall not be faithful hounds) (Chorus, Szilagyi Mihaly)
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 127.54
  additional property: Musical Key
    type: PropertyValue
    value: 0
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.386
  additional property: Energy
    type: PropertyValue
    value: 0.253
  additional property: Speechiness
    type: PropertyValue
    value: 0.042
  additional property: Acousticness
    type: PropertyValue
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  additional property: Instrumentalness
    type: PropertyValue
    value: 0.001
  additional property: Liveness
    type: PropertyValue
    value: 0.443
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.366
  additional property: Loudness (dB)
    type: PropertyValue
    value: -21.042
  additional property: Key Name
    type: PropertyValue
    value: C
  additional property: Mode Name
    type: PropertyValue
    value: Major
isrc code: HUA251258102
additional property: CopyrightID
additional property: ProofProfileEvidenceStatus
  type: PropertyValue
  value: verified-cc-db-prod
additional property: TokenDeploymentConfirmed
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additional property: ContentHash
additional property: BitcoinBlock
  type: PropertyValue
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additional property: BitcoinTime
  type: PropertyValue
  value: 2026-07-31T10:20:10+00:00
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUA251258102
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960389
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T10:20:10+00:00
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

Hunyadi Laszlo: Act I Scene 1: Legy udvoz … (Welcome … ) (Chorus, Laszlo, Szilagyi Mihaly, Hadnagy, Lieutenant)
type: MusicRecording
duration: PT4M48S
duration ms: 288800
explicit: false
by artist: Ferenc Erkel
by artist: András Molnár
by artist: Istvan Gati
by artist: Sylvia Sass
by artist: Dénes Gulyás
by artist: Zsuzsanna Denes
by artist: Sandor Sòlyom-Nagy
by artist: Magda Kalmár
by artist: József Gregor
by artist: Miklos Mersei
by artist: Attila Fulop
by artist: Hungarian People's Army Male Chorus
by artist: Hungarian State Opera Chorus
by artist: Hungarian State Opera Orchestra
by artist: Janos Kovacs
in album: Erkel: Hunyadi Laszlo
  type: MusicAlbum
  date published: 2014-07-15
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa73bb5f6d022dd255e1b6740f6e5024d74915af664ac54e5b39a1e3ff411be2. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/HUA251258104.
  date published: 2026-08-01T00:15:43Z
audio: Hunyadi Laszlo: Act I Scene 1: Legy udvoz … (Welcome … ) (Chorus, Laszlo, Szilagyi Mihaly, Hadnagy, Lieutenant)
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 139.194
  additional property: Musical Key
    type: PropertyValue
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  additional property: Mode (Major/Minor)
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  additional property: Time Signature
    type: PropertyValue
    value: 6
  additional property: Danceability
    type: PropertyValue
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  additional property: Energy
    type: PropertyValue
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  additional property: Speechiness
    type: PropertyValue
    value: 0.055
  additional property: Acousticness
    type: PropertyValue
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  additional property: Instrumentalness
    type: PropertyValue
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  additional property: Liveness
    type: PropertyValue
    value: 0.051
  additional property: Valence (Positivity)
    type: PropertyValue
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  additional property: Loudness (dB)
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  additional property: Key Name
    type: PropertyValue
    value: C
  additional property: Mode Name
    type: PropertyValue
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isrc code: HUA251258104
additional property: CopyrightID
additional property: ProofProfileEvidenceStatus
  type: PropertyValue
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additional property: TokenDeploymentConfirmed
  type: PropertyValue
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additional property: ContentHash
additional property: BitcoinBlock
  type: PropertyValue
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additional property: BitcoinTime
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additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUA251258104
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960487
additional property: OTSTimestamp
  type: PropertyValue
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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