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genre: opera
description: Erich Kunz (20 May 1909 – 8 September 1995) was an Austrian operatic baritone, particularly associated with the roles of Papageno and Beckmesser. Early life Born in Vienna, Kunz was educated at the V
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  track: Le nozze di Figaro, K. 492, Act IV Scene 13: Tutto è tranquillo e placido - Scene 14 Pace, pace, mio dolce tesoro! (Figaro, Susanna, Il Conte) - Live in the Royal Festival Hall, 1954
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Le nozze di Figaro, K. 492, Act IV Scene 13: Tutto è tranquillo e placido - Scene 14 Pace, pace, mio dolce tesoro! (Figaro, Susanna, Il Conte) - Live in the Royal Festival Hall, 1954
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Nur für Natur (Der lustige Krieg)
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  date published: 2026-07-08T08:56:20Z
audio: Nur für Natur (Der lustige Krieg)
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Es wird ein Wein sein
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  additional property: Speechiness
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  additional property: Acousticness
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  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
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  additional property: Valence (Positivity)
    type: PropertyValue
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  additional property: Loudness (dB)
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Es steht ein alter Nussbaum
type: MusicRecording
duration: PT2M38S
duration ms: 158666
explicit: false
by artist: Erich Kunz
in album: Wiener Lieder
  type: MusicAlbum
  date published: 2006-08-22
genre: opera
isrc code: ATP138901203
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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  value: 957118
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/ATP138901203
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
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additional property: TokenDeploymentConfirmed
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additional property: ContentHash
additional property: BitcoinBlock
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additional property: BitcoinTime
  type: PropertyValue
  value: 2026-07-08T03:20:19+00:00
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c47f02af58152ed4553a8f5e6e1edb4cfdfc879ebb997d66bfb306f78e6212d. 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/ATP138901203.
  date published: 2026-07-08T03:22:41Z
audio: Es steht ein alter Nussbaum
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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
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The Merry Widow: Overture
type: MusicRecording
duration: PT8M31S
duration ms: 511960
explicit: false
by artist: Franz Lehár
by artist: Anton Niessner
by artist: Emmy Loose
by artist: Erich Kunz
by artist: Elisabeth Schwarzkopf
by artist: Nicolai Gedda
by artist: Otakar Kraus
by artist: Josef Schmidinger
by artist: Philharmonia Orchestra
by artist: Philharmonia Chorus
by artist: Otto Ackermann
in album: Lehár: The Merry Widow
  type: MusicAlbum
  date published: 2003
genre: opera
isrc code: GBJ2F1010734
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T00:16:24+00:00
additional property: CopyrightChainExplorerURL
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  value: https://explorer.copyrightchains.com/tx/0xa37a2527b0c8ace34232be591c2e7da202b4d12d4e82db62796cd87db7ebc8d4
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/GBJ2F1010734
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:20:19Z
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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additional property: ContentHash
additional property: BitcoinBlock
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additional property: BitcoinTime
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subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37a2527b0c8ace34232be591c2e7da202b4d12d4e82db62796cd87db7ebc8d4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBJ2F1010734.
  date published: 2026-07-08T03:20:19Z
audio: The Merry Widow: Overture
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  additional property: Musical Key
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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: 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
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  additional property: Mode Name
    type: PropertyValue
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The Merry Widow: Act I, "O Vaterland du mächst bei Tag"
type: MusicRecording
duration: PT2M7S
duration ms: 127053
explicit: false
by artist: Franz Lehár
by artist: Anton Niessner
by artist: Emmy Loose
by artist: Erich Kunz
by artist: Elisabeth Schwarzkopf
by artist: Nicolai Gedda
by artist: Otakar Kraus
by artist: Josef Schmidinger
by artist: Philharmonia Orchestra
by artist: Philharmonia Chorus
by artist: Otto Ackermann
in album: Lehár: The Merry Widow
  type: MusicAlbum
  date published: 2003
genre: opera
isrc code: GBJ2F1010742
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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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/GBJ2F1010742
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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additional property: ContentHash
additional property: BitcoinBlock
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additional property: BitcoinTime
  type: PropertyValue
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subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd8e453147925fb5b42a9fbb75af9585bad09c0a3f171988ab67ccbaa9111057. 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/GBJ2F1010742.
  date published: 2026-07-08T03:53:27Z
audio: The Merry Widow: Act I, "O Vaterland du mächst bei Tag"
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  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
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  additional property: Danceability
    type: PropertyValue
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  additional property: Energy
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  additional property: Speechiness
    type: PropertyValue
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  additional property: Acousticness
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  additional property: Instrumentalness
    type: PropertyValue
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  additional property: Liveness
    type: PropertyValue
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
    type: PropertyValue
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  additional property: Key Name
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    value: Bb
  additional property: Mode Name
    type: PropertyValue
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The Merry Widow: Act I, "Wie die Blumen in Lenze erblüh'n"
type: MusicRecording
duration: PT6M11S
duration ms: 371466
explicit: false
by artist: Franz Lehár
by artist: Anton Niessner
by artist: Emmy Loose
by artist: Erich Kunz
by artist: Elisabeth Schwarzkopf
by artist: Nicolai Gedda
by artist: Otakar Kraus
by artist: Josef Schmidinger
by artist: Philharmonia Orchestra
by artist: Philharmonia Chorus
by artist: Otto Ackermann
in album: Lehár: The Merry Widow
  type: MusicAlbum
  date published: 2003
genre: opera
isrc code: GBJ2F1010745
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T03:08:57+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x8709c0058c48fc9cbe46fdfbac77360841ad31051c98b67b008be364dbad6740
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 957118
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/GBJ2F1010745
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:20:19Z
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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additional property: ContentHash
additional property: BitcoinBlock
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additional property: BitcoinTime
  type: PropertyValue
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subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8709c0058c48fc9cbe46fdfbac77360841ad31051c98b67b008be364dbad6740. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBJ2F1010745.
  date published: 2026-07-08T03:20:19Z
audio: The Merry Widow: Act I, "Wie die Blumen in Lenze erblüh'n"
  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
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  additional property: Danceability
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  additional property: Energy
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  additional property: Speechiness
    type: PropertyValue
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  additional property: Acousticness
    type: PropertyValue
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  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
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  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.388
  additional property: Loudness (dB)
    type: PropertyValue
    value: -13.919
  additional property: Key Name
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  additional property: Mode Name
    type: PropertyValue
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The Merry Widow: Act II, "Wie eine Rosenknospe"
type: MusicRecording
duration: PT2M21S
duration ms: 141013
explicit: false
by artist: Franz Lehár
by artist: Anton Niessner
by artist: Emmy Loose
by artist: Erich Kunz
by artist: Elisabeth Schwarzkopf
by artist: Nicolai Gedda
by artist: Otakar Kraus
by artist: Josef Schmidinger
by artist: Philharmonia Orchestra
by artist: Philharmonia Chorus
by artist: Otto Ackermann
in album: Lehár: The Merry Widow
  type: MusicAlbum
  date published: 2003
genre: opera
isrc code: GBJ2F1010754
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-06T20:21:27+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x5ba21ceb32dd8025ca8ebf5bf674e25388d46e74807533e540452354a8b3884e
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 957118
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/GBJ2F1010754
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
  type: PropertyValue
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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 0x5ba21ceb32dd8025ca8ebf5bf674e25388d46e74807533e540452354a8b3884e. 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/GBJ2F1010754.
  date published: 2026-07-08T03:22:41Z
audio: The Merry Widow: Act II, "Wie eine Rosenknospe"
  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
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  additional property: Danceability
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  additional property: Energy
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  additional property: Speechiness
    type: PropertyValue
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  additional property: Acousticness
    type: PropertyValue
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  additional property: Instrumentalness
    type: PropertyValue
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  additional property: Liveness
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  additional property: Valence (Positivity)
    type: PropertyValue
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  additional property: Loudness (dB)
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  additional property: Key Name
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  additional property: Mode Name
    type: PropertyValue
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The Merry Widow: Act II, "Nun wissen Sie, meine Herrschaften"
type: MusicRecording
duration: PT5M4S
duration ms: 304213
explicit: false
by artist: Franz Lehár
by artist: Anton Niessner
by artist: Emmy Loose
by artist: Erich Kunz
by artist: Elisabeth Schwarzkopf
by artist: Nicolai Gedda
by artist: Otakar Kraus
by artist: Josef Schmidinger
by artist: Philharmonia Orchestra
by artist: Philharmonia Chorus
by artist: Otto Ackermann
in album: Lehár: The Merry Widow
  type: MusicAlbum
  date published: 2003
genre: opera
isrc code: GBJ2F1010758
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T03:37:11+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xe94282476b999c934b052fc653a6080646d8f3db5175fe826d7a8509fd57b7cb
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 957118
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/GBJ2F1010758
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
  type: PropertyValue
  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 0xe94282476b999c934b052fc653a6080646d8f3db5175fe826d7a8509fd57b7cb. 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/GBJ2F1010758.
  date published: 2026-07-08T03:22:41Z
audio: The Merry Widow: Act II, "Nun wissen Sie, meine Herrschaften"
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  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
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  additional property: Danceability
    type: PropertyValue
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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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The Merry Widow: Act III, "Njegus, was ist das mit der Musik?"
type: MusicRecording
duration: PT0M45S
duration ms: 45693
explicit: false
by artist: Franz Lehár
by artist: Anton Niessner
by artist: Emmy Loose
by artist: Erich Kunz
by artist: Elisabeth Schwarzkopf
by artist: Nicolai Gedda
by artist: Otakar Kraus
by artist: Josef Schmidinger
by artist: Philharmonia Orchestra
by artist: Philharmonia Chorus
by artist: Otto Ackermann
in album: Lehár: The Merry Widow
  type: MusicAlbum
  date published: 2003
genre: opera
isrc code: GBJ2F1010760
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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  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
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additional property: TokenDeploymentConfirmed
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additional property: ContentHash
additional property: BitcoinBlock
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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 0x2c94212f1997edab14fac1a805c4190f301ade170a622a988c64b38a9e17a887. 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/GBJ2F1010760.
  date published: 2026-07-08T03:53:27Z
audio: The Merry Widow: Act III, "Njegus, was ist das mit der Musik?"
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The Merry Widow: Act III, "Ja, wir sind es, die Grisetten"
type: MusicRecording
duration: PT2M30S
duration ms: 150826
explicit: false
by artist: Franz Lehár
by artist: Anton Niessner
by artist: Emmy Loose
by artist: Erich Kunz
by artist: Elisabeth Schwarzkopf
by artist: Nicolai Gedda
by artist: Otakar Kraus
by artist: Josef Schmidinger
by artist: Philharmonia Orchestra
by artist: Philharmonia Chorus
by artist: Otto Ackermann
in album: Lehár: The Merry Widow
  type: MusicAlbum
  date published: 2003
genre: opera
isrc code: GBJ2F1010761
additional property: CopyrightID
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
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  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBJ2F1010761
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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additional property: ContentHash
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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 0x99636f14fb02d9d04e8dee9f08f3412d67a4c3b2cfbd4ba13b3210b3af0678fa. 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/GBJ2F1010761.
  date published: 2026-07-08T03:22:41Z
audio: The Merry Widow: Act III, "Ja, wir sind es, die Grisetten"
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The Merry Widow: Act III, "Bei jedem Walzerschritt"
type: MusicRecording
duration: PT1M58S
duration ms: 118040
explicit: false
by artist: Franz Lehár
by artist: Anton Niessner
by artist: Emmy Loose
by artist: Erich Kunz
by artist: Elisabeth Schwarzkopf
by artist: Nicolai Gedda
by artist: Otakar Kraus
by artist: Josef Schmidinger
by artist: Philharmonia Orchestra
by artist: Philharmonia Chorus
by artist: Otto Ackermann
in album: Lehár: The Merry Widow
  type: MusicAlbum
  date published: 2003
genre: opera
isrc code: GBJ2F1010763
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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  value: https://blockstream.info/api/block-height/957118
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBJ2F1010763
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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additional property: ContentHash
additional property: BitcoinBlock
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additional property: BitcoinTime
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subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d5bd2f016304c1602878b6d00da484dd284c3bb5d871ef4610a45d4e884a8f. 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/GBJ2F1010763.
  date published: 2026-07-08T03:22:41Z
audio: The Merry Widow: Act III, "Bei jedem Walzerschritt"
  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: Danceability
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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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The Merry Widow: Act I, "Verehrteste Damen un Herren"
type: MusicRecording
duration: PT2M44S
duration ms: 164426
explicit: false
by artist: Franz Lehár
by artist: Anton Niessner
by artist: Emmy Loose
by artist: Erich Kunz
by artist: Elisabeth Schwarzkopf
by artist: Nicolai Gedda
by artist: Otakar Kraus
by artist: Josef Schmidinger
by artist: Philharmonia Orchestra
by artist: Philharmonia Chorus
by artist: Otto Ackermann
in album: Lehár: The Merry Widow
  type: MusicAlbum
  date published: 2003
genre: opera
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b78f912a725f0bf4f0b9c8cf0c5cbcdd0072ebeaac3a97db5bd9151b02855c. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/GBJ2F1010735.
  date published: 2026-07-29T22:48:59Z
audio: The Merry Widow: Act I, "Verehrteste Damen un Herren"
  type: AudioObject
  additional property: Tempo (BPM)
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  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
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  additional property: Danceability
    type: PropertyValue
    value: 0.472
  additional property: Energy
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  additional property: Speechiness
    type: PropertyValue
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  additional property: Acousticness
    type: PropertyValue
    value: 0.908
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.304
  additional property: Liveness
    type: PropertyValue
    value: 0.554
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.596
  additional property: Loudness (dB)
    type: PropertyValue
    value: -13.448
  additional property: Key Name
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  additional property: Mode Name
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isrc code: GBJ2F1010735
additional property: CopyrightID
additional property: ProofProfileEvidenceStatus
  type: PropertyValue
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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
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBJ2F1010735
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
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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

The Merry Widow: Act I, "Und jetzt, meine Herrschaften"
type: MusicRecording
duration: PT0M47S
duration ms: 47133
explicit: false
by artist: Franz Lehár
by artist: Anton Niessner
by artist: Emmy Loose
by artist: Erich Kunz
by artist: Elisabeth Schwarzkopf
by artist: Nicolai Gedda
by artist: Otakar Kraus
by artist: Josef Schmidinger
by artist: Philharmonia Orchestra
by artist: Philharmonia Chorus
by artist: Otto Ackermann
in album: Lehár: The Merry Widow
  type: MusicAlbum
  date published: 2003
genre: opera
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42559e0d3dfbc086a4da456ed42a91f6e88c34c5cb5e7396ebd582e3e0525258. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/GBJ2F1010736.
  date published: 2026-07-30T18:23:33Z
audio: The Merry Widow: Act I, "Und jetzt, meine Herrschaften"
  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: 0.697
  additional property: Energy
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  additional property: Speechiness
    type: PropertyValue
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  additional property: Acousticness
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  additional property: Instrumentalness
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  additional property: Liveness
    type: PropertyValue
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
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isrc code: GBJ2F1010736
additional property: CopyrightID
additional property: ProofProfileEvidenceStatus
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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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additional property: OTSHash
additional property: OTSBitcoinBlock
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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

The Merry Widow: Act I, "So kommen Sie!...Ich bin eine anständ'ge Frau"
type: MusicRecording
duration: PT4M18S
duration ms: 258800
explicit: false
by artist: Franz Lehár
by artist: Anton Niessner
by artist: Emmy Loose
by artist: Erich Kunz
by artist: Elisabeth Schwarzkopf
by artist: Nicolai Gedda
by artist: Otakar Kraus
by artist: Josef Schmidinger
by artist: Philharmonia Orchestra
by artist: Philharmonia Chorus
by artist: Otto Ackermann
in album: Lehár: The Merry Widow
  type: MusicAlbum
  date published: 2003
genre: opera
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x634c49908e7a356322572f00f47e3771ce28350a0ab37247d1320c364dc738e0. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/GBJ2F1010737.
  date published: 2026-07-29T23:23:05Z
audio: The Merry Widow: Act I, "So kommen Sie!...Ich bin eine anständ'ge Frau"
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 167.705
  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: 0.192
  additional property: Speechiness
    type: PropertyValue
    value: 0.078
  additional property: Acousticness
    type: PropertyValue
    value: 0.983
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.17
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.37
  additional property: Loudness (dB)
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  additional property: Mode Name
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isrc code: GBJ2F1010737
additional property: CopyrightID
additional property: ProofProfileEvidenceStatus
  type: PropertyValue
  value: verified-cc-db-prod
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/GBJ2F1010737
additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
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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

The Merry Widow: Act I, "Bitte meine Herr'n"
type: MusicRecording
duration: PT3M15S
duration ms: 195413
explicit: false
by artist: Franz Lehár
by artist: Anton Niessner
by artist: Emmy Loose
by artist: Erich Kunz
by artist: Elisabeth Schwarzkopf
by artist: Nicolai Gedda
by artist: Otakar Kraus
by artist: Josef Schmidinger
by artist: Philharmonia Orchestra
by artist: Philharmonia Chorus
by artist: Otto Ackermann
in album: Lehár: The Merry Widow
  type: MusicAlbum
  date published: 2003
genre: opera
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-30T15:42:38Z
audio: The Merry Widow: Act I, "Bitte meine Herr'n"
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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

The Merry Widow: Act I, "Njegus, waren Sie beim Count Danilo?"
type: MusicRecording
duration: PT0M53S
duration ms: 53013
explicit: false
by artist: Franz Lehár
by artist: Anton Niessner
by artist: Emmy Loose
by artist: Erich Kunz
by artist: Elisabeth Schwarzkopf
by artist: Nicolai Gedda
by artist: Otakar Kraus
by artist: Josef Schmidinger
by artist: Philharmonia Orchestra
by artist: Philharmonia Chorus
by artist: Otto Ackermann
in album: Lehár: The Merry Widow
  type: MusicAlbum
  date published: 2003
genre: opera
subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x688eba3211eb19f94d07c1f00054155490013e05cf6dd17b62b880b48849c642. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GBJ2F1010741.
  date published: 2026-07-31T05:17:02Z
audio: The Merry Widow: Act I, "Njegus, waren Sie beim Count Danilo?"
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additional property: CopyrightID
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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

The Merry Widow: Act I, "Ach Njegus, Geliebter, wo ist Vaterland?"
type: MusicRecording
duration: PT4M0S
duration ms: 240800
explicit: false
by artist: Franz Lehár
by artist: Anton Niessner
by artist: Emmy Loose
by artist: Erich Kunz
by artist: Elisabeth Schwarzkopf
by artist: Nicolai Gedda
by artist: Otakar Kraus
by artist: Josef Schmidinger
by artist: Philharmonia Orchestra
by artist: Philharmonia Chorus
by artist: Otto Ackermann
in album: Lehár: The Merry Widow
  type: MusicAlbum
  date published: 2003
genre: opera
subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4638a1ce411ebb26776bb75f5764b0807c9c815f1dce6e9147e4e62fe3c66b2d. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/GBJ2F1010743.
  date published: 2026-07-30T09:37:10Z
audio: The Merry Widow: Act I, "Ach Njegus, Geliebter, wo ist Vaterland?"
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additional property: CopyrightID
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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

The Merry Widow: Act I, "Damenwahl! Hört man rufen rings im Saal!"
type: MusicRecording
duration: PT3M6S
duration ms: 186120
explicit: false
by artist: Franz Lehár
by artist: Anton Niessner
by artist: Emmy Loose
by artist: Erich Kunz
by artist: Elisabeth Schwarzkopf
by artist: Nicolai Gedda
by artist: Otakar Kraus
by artist: Josef Schmidinger
by artist: Philharmonia Orchestra
by artist: Philharmonia Chorus
by artist: Otto Ackermann
in album: Lehár: The Merry Widow
  type: MusicAlbum
  date published: 2003
genre: opera
subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2230b6907d2b9d6a12e3298fb6fa932d0018c177ec55719ccd26cd8e2442eecc. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/GBJ2F1010744.
  date published: 2026-07-30T11:13:28Z
audio: The Merry Widow: Act I, "Damenwahl! Hört man rufen rings im Saal!"
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  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
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  additional property: Danceability
    type: PropertyValue
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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: CopyrightID
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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

The Merry Widow: Act II, "Ich bitte, hier jetzt zu verweilen"
type: MusicRecording
duration: PT2M49S
duration ms: 169560
explicit: false
by artist: Franz Lehár
by artist: Anton Niessner
by artist: Emmy Loose
by artist: Erich Kunz
by artist: Elisabeth Schwarzkopf
by artist: Nicolai Gedda
by artist: Otakar Kraus
by artist: Josef Schmidinger
by artist: Philharmonia Orchestra
by artist: Philharmonia Chorus
by artist: Otto Ackermann
in album: Lehár: The Merry Widow
  type: MusicAlbum
  date published: 2003
genre: opera
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9500bba9d510251d7a94528086aca0bf99a8821add4803e40b5714be021310df. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/GBJ2F1010746.
  date published: 2026-07-30T20:09:33Z
audio: The Merry Widow: Act II, "Ich bitte, hier jetzt zu verweilen"
  type: AudioObject
  additional property: Tempo (BPM)
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  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: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.239
  additional property: Energy
    type: PropertyValue
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  additional property: Speechiness
    type: PropertyValue
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  additional property: Acousticness
    type: PropertyValue
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  additional property: Instrumentalness
    type: PropertyValue
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  additional property: Liveness
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  additional property: Valence (Positivity)
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isrc code: GBJ2F1010746
additional property: CopyrightID
additional property: ProofProfileEvidenceStatus
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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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additional property: OTSHash
additional property: OTSBitcoinBlock
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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

The Merry Widow: Act II, "Nun lasst uns aber wie daheim...Viljalied"
type: MusicRecording
duration: PT5M36S
duration ms: 336813
explicit: false
by artist: Franz Lehár
by artist: Anton Niessner
by artist: Emmy Loose
by artist: Erich Kunz
by artist: Elisabeth Schwarzkopf
by artist: Nicolai Gedda
by artist: Otakar Kraus
by artist: Josef Schmidinger
by artist: Philharmonia Orchestra
by artist: Philharmonia Chorus
by artist: Otto Ackermann
in album: Lehár: The Merry Widow
  type: MusicAlbum
  date published: 2003
genre: opera
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd4c1d10d84e7f605c9421e6877a796759658250f88e4b1d567390d056929815. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/GBJ2F1010747.
  date published: 2026-07-30T10:42:33Z
audio: The Merry Widow: Act II, "Nun lasst uns aber wie daheim...Viljalied"
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 106.568
  additional property: Musical Key
    type: PropertyValue
    value: 7
  additional property: Mode (Major/Minor)
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    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.23
  additional property: Energy
    type: PropertyValue
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  additional property: Speechiness
    type: PropertyValue
    value: 0.05
  additional property: Acousticness
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  additional property: Instrumentalness
    type: PropertyValue
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  additional property: Liveness
    type: PropertyValue
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
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isrc code: GBJ2F1010747
additional property: CopyrightID
additional property: ProofProfileEvidenceStatus
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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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additional property: OTSHash
additional property: OTSBitcoinBlock
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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

The Merry Widow: Act II, "Heia, Mädel, aufgeschaut"
type: MusicRecording
duration: PT2M55S
duration ms: 175546
explicit: false
by artist: Franz Lehár
by artist: Anton Niessner
by artist: Emmy Loose
by artist: Erich Kunz
by artist: Elisabeth Schwarzkopf
by artist: Nicolai Gedda
by artist: Otakar Kraus
by artist: Josef Schmidinger
by artist: Philharmonia Orchestra
by artist: Philharmonia Chorus
by artist: Otto Ackermann
in album: Lehár: The Merry Widow
  type: MusicAlbum
  date published: 2003
genre: opera
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5bc6e589c1063208f3a328f64127f5132ab5cdfb8621c2b90d8fa0737ed1f1d. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/GBJ2F1010749.
  date published: 2026-07-30T15:42:38Z
audio: The Merry Widow: Act II, "Heia, Mädel, aufgeschaut"
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 169.241
  additional property: Musical Key
    type: PropertyValue
    value: 9
  additional property: Mode (Major/Minor)
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    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.449
  additional property: Energy
    type: PropertyValue
    value: 0.299
  additional property: Speechiness
    type: PropertyValue
    value: 0.076
  additional property: Acousticness
    type: PropertyValue
    value: 0.956
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.002
  additional property: Liveness
    type: PropertyValue
    value: 0.37
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.533
  additional property: Loudness (dB)
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    type: PropertyValue
    value: Major
isrc code: GBJ2F1010749
additional property: CopyrightID
additional property: ProofProfileEvidenceStatus
  type: PropertyValue
  value: verified-cc-db-prod
additional property: TokenDeploymentConfirmed
  type: PropertyValue
  value: true
additional property: ContentHash
additional property: BitcoinBlock
  type: PropertyValue
  value: 960273
additional property: BitcoinTime
  type: PropertyValue
  value: 2026-07-30T15:42:38+00:00
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBJ2F1010749
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960273
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960273
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-30T15:42:38+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

The Merry Widow: Act II, "Wie die Weiber?"
type: MusicRecording
duration: PT2M42S
duration ms: 162000
explicit: false
by artist: Franz Lehár
by artist: Anton Niessner
by artist: Emmy Loose
by artist: Erich Kunz
by artist: Elisabeth Schwarzkopf
by artist: Nicolai Gedda
by artist: Otakar Kraus
by artist: Josef Schmidinger
by artist: Philharmonia Orchestra
by artist: Philharmonia Chorus
by artist: Otto Ackermann
in album: Lehár: The Merry Widow
  type: MusicAlbum
  date published: 2003
genre: opera
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf2a0634ee2581acf8cc7f56fb409e53c2b0c7c9e6249e382472a9cb81803da8. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/GBJ2F1010751.
  date published: 2026-07-31T09:25:34Z
audio: The Merry Widow: Act II, "Wie die Weiber?"
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 148.253
  additional property: Musical Key
    type: PropertyValue
    value: 2
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.539
  additional property: Energy
    type: PropertyValue
    value: 0.577
  additional property: Speechiness
    type: PropertyValue
    value: 0.142
  additional property: Acousticness
    type: PropertyValue
    value: 0.958
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.028
  additional property: Liveness
    type: PropertyValue
    value: 0.847
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.544
  additional property: Loudness (dB)
    type: PropertyValue
    value: -12.786
  additional property: Key Name
    type: PropertyValue
    value: D
  additional property: Mode Name
    type: PropertyValue
    value: Major
isrc code: GBJ2F1010751
additional property: CopyrightID
additional property: ProofProfileEvidenceStatus
  type: PropertyValue
  value: verified-cc-db-prod
additional property: TokenDeploymentConfirmed
  type: PropertyValue
  value: true
additional property: ContentHash
additional property: BitcoinBlock
  type: PropertyValue
  value: 960379
additional property: BitcoinTime
  type: PropertyValue
  value: 2026-07-31T09:25:34+00:00
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBJ2F1010751
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960379
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960379
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T09:25:34+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

The Merry Widow: Act II, "Mein Freund, Vernunft!"
type: MusicRecording
duration: PT1M32S
duration ms: 92973
explicit: false
by artist: Franz Lehár
by artist: Anton Niessner
by artist: Emmy Loose
by artist: Erich Kunz
by artist: Elisabeth Schwarzkopf
by artist: Nicolai Gedda
by artist: Otakar Kraus
by artist: Josef Schmidinger
by artist: Philharmonia Orchestra
by artist: Philharmonia Chorus
by artist: Otto Ackermann
in album: Lehár: The Merry Widow
  type: MusicAlbum
  date published: 2003
genre: opera
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3689fb424f0343bd88f474f827b42b8fe4d241670295c1feb83e97f93432eb3. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBJ2F1010753.
  date published: 2026-07-30T01:32:48Z
audio: The Merry Widow: Act II, "Mein Freund, Vernunft!"
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 112.184
  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: 0.498
  additional property: Energy
    type: PropertyValue
    value: 0.139
  additional property: Speechiness
    type: PropertyValue
    value: 0.052
  additional property: Acousticness
    type: PropertyValue
    value: 0.976
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.114
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.256
  additional property: Loudness (dB)
    type: PropertyValue
    value: -15.882
  additional property: Key Name
    type: PropertyValue
    value: C
  additional property: Mode Name
    type: PropertyValue
    value: Major
isrc code: GBJ2F1010753
additional property: CopyrightID
additional property: ProofProfileEvidenceStatus
  type: PropertyValue
  value: verified-cc-db-prod
additional property: TokenDeploymentConfirmed
  type: PropertyValue
  value: true
additional property: ContentHash
additional property: BitcoinBlock
  type: PropertyValue
  value: 960185
additional property: BitcoinTime
  type: PropertyValue
  value: 2026-07-30T01:32:48+00:00
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBJ2F1010753
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960185
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960185
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-30T01:32:48+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

The Merry Widow: Act II, "Sieh dort den kleinen Pavillon"
type: MusicRecording
duration: PT2M17S
duration ms: 137386
explicit: false
by artist: Franz Lehár
by artist: Anton Niessner
by artist: Emmy Loose
by artist: Erich Kunz
by artist: Elisabeth Schwarzkopf
by artist: Nicolai Gedda
by artist: Otakar Kraus
by artist: Josef Schmidinger
by artist: Philharmonia Orchestra
by artist: Philharmonia Chorus
by artist: Otto Ackermann
in album: Lehár: The Merry Widow
  type: MusicAlbum
  date published: 2003
genre: opera
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6653d3a31f1d06e3eecc07d14b1b7bc0f85490c733b21b72e84c15947925a7. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/GBJ2F1010755.
  date published: 2026-07-30T00:39:11Z
audio: The Merry Widow: Act II, "Sieh dort den kleinen Pavillon"
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 111.977
  additional property: Musical Key
    type: PropertyValue
    value: 5
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.214
  additional property: Energy
    type: PropertyValue
    value: 0.326
  additional property: Speechiness
    type: PropertyValue
    value: 0.038
  additional property: Acousticness
    type: PropertyValue
    value: 0.972
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.151
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.092
  additional property: Loudness (dB)
    type: PropertyValue
    value: -14.151
  additional property: Key Name
    type: PropertyValue
    value: F
  additional property: Mode Name
    type: PropertyValue
    value: Major
isrc code: GBJ2F1010755
additional property: CopyrightID
additional property: ProofProfileEvidenceStatus
  type: PropertyValue
  value: verified-cc-db-prod
additional property: TokenDeploymentConfirmed
  type: PropertyValue
  value: true
additional property: ContentHash
additional property: BitcoinBlock
  type: PropertyValue
  value: 960179
additional property: BitcoinTime
  type: PropertyValue
  value: 2026-07-30T00:39:11+00:00
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBJ2F1010755
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960179
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960179
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-30T00:39:11+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

The Merry Widow: Act II, "Die Baronin und Herr Rosillon sind im Pavillon"
type: MusicRecording
duration: PT1M19S
duration ms: 79600
explicit: false
by artist: Franz Lehár
by artist: Anton Niessner
by artist: Emmy Loose
by artist: Erich Kunz
by artist: Elisabeth Schwarzkopf
by artist: Nicolai Gedda
by artist: Otakar Kraus
by artist: Josef Schmidinger
by artist: Philharmonia Orchestra
by artist: Philharmonia Chorus
by artist: Otto Ackermann
in album: Lehár: The Merry Widow
  type: MusicAlbum
  date published: 2003
genre: opera
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54be6e18821e178a707946c057d00864b5d0260b6245611c049490557bbeb9f9. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBJ2F1010756.
  date published: 2026-07-31T19:53:13Z
audio: The Merry Widow: Act II, "Die Baronin und Herr Rosillon sind im Pavillon"
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 101.39
  additional property: Musical Key
    type: PropertyValue
    value: 2
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.64
  additional property: Energy
    type: PropertyValue
    value: 0.201
  additional property: Speechiness
    type: PropertyValue
    value: 0.931
  additional property: Acousticness
    type: PropertyValue
    value: 0.614
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.094
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.642
  additional property: Loudness (dB)
    type: PropertyValue
    value: -24.595
  additional property: Key Name
    type: PropertyValue
    value: D
  additional property: Mode Name
    type: PropertyValue
    value: Major
isrc code: GBJ2F1010756
additional property: CopyrightID
additional property: ProofProfileEvidenceStatus
  type: PropertyValue
  value: verified-cc-db-prod
additional property: TokenDeploymentConfirmed
  type: PropertyValue
  value: true
additional property: ContentHash
additional property: BitcoinBlock
  type: PropertyValue
  value: 960455
additional property: BitcoinTime
  type: PropertyValue
  value: 2026-07-31T19:53:13+00:00
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBJ2F1010756
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960455
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960455
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T19:53:13+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

The Merry Widow: Act II, "Ha! Ha!"
type: MusicRecording
duration: PT3M8S
duration ms: 188080
explicit: false
by artist: Franz Lehár
by artist: Anton Niessner
by artist: Emmy Loose
by artist: Erich Kunz
by artist: Elisabeth Schwarzkopf
by artist: Nicolai Gedda
by artist: Otakar Kraus
by artist: Josef Schmidinger
by artist: Philharmonia Orchestra
by artist: Philharmonia Chorus
by artist: Otto Ackermann
in album: Lehár: The Merry Widow
  type: MusicAlbum
  date published: 2003
genre: opera
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc08a95dfa900afb5b0b058440ee3147694882c70470672a6807e0ded1f191cc. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/GBJ2F1010757.
  date published: 2026-07-30T16:10:47Z
audio: The Merry Widow: Act II, "Ha! Ha!"
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 119.204
  additional property: Musical Key
    type: PropertyValue
    value: 5
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.436
  additional property: Energy
    type: PropertyValue
    value: 0.366
  additional property: Speechiness
    type: PropertyValue
    value: 0.051
  additional property: Acousticness
    type: PropertyValue
    value: 0.945
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.61
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.462
  additional property: Loudness (dB)
    type: PropertyValue
    value: -13.322
  additional property: Key Name
    type: PropertyValue
    value: F
  additional property: Mode Name
    type: PropertyValue
    value: Major
isrc code: GBJ2F1010757
additional property: CopyrightID
additional property: ProofProfileEvidenceStatus
  type: PropertyValue
  value: verified-cc-db-prod
additional property: TokenDeploymentConfirmed
  type: PropertyValue
  value: true
additional property: ContentHash
additional property: BitcoinBlock
  type: PropertyValue
  value: 960277
additional property: BitcoinTime
  type: PropertyValue
  value: 2026-07-30T16:10:47+00:00
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBJ2F1010757
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960277
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960277
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-30T16:10:47+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

The Merry Widow: Act II, "Es waren zwei Königskinder"
type: MusicRecording
duration: PT3M25S
duration ms: 205186
explicit: false
by artist: Franz Lehár
by artist: Anton Niessner
by artist: Emmy Loose
by artist: Erich Kunz
by artist: Elisabeth Schwarzkopf
by artist: Nicolai Gedda
by artist: Otakar Kraus
by artist: Josef Schmidinger
by artist: Philharmonia Orchestra
by artist: Philharmonia Chorus
by artist: Otto Ackermann
in album: Lehár: The Merry Widow
  type: MusicAlbum
  date published: 2003
genre: opera
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x669d06bd653af308a84091878ab499147cedd64cb89ed5174e688caea5dc54c9. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/GBJ2F1010759.
  date published: 2026-07-31T05:48:18Z
audio: The Merry Widow: Act II, "Es waren zwei Königskinder"
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 141.794
  additional property: Musical Key
    type: PropertyValue
    value: 7
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.441
  additional property: Energy
    type: PropertyValue
    value: 0.305
  additional property: Speechiness
    type: PropertyValue
    value: 0.071
  additional property: Acousticness
    type: PropertyValue
    value: 0.935
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.111
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.361
  additional property: Loudness (dB)
    type: PropertyValue
    value: -14.419
  additional property: Key Name
    type: PropertyValue
    value: G
  additional property: Mode Name
    type: PropertyValue
    value: Major
isrc code: GBJ2F1010759
additional property: CopyrightID
additional property: ProofProfileEvidenceStatus
  type: PropertyValue
  value: verified-cc-db-prod
additional property: TokenDeploymentConfirmed
  type: PropertyValue
  value: true
additional property: ContentHash
additional property: BitcoinBlock
  type: PropertyValue
  value: 960354
additional property: BitcoinTime
  type: PropertyValue
  value: 2026-07-31T05:48:18+00:00
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBJ2F1010759
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960354
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960354
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T05:48:18+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

The Merry Widow: Act III, "Gospodina, pravalni!"
type: MusicRecording
duration: PT0M43S
duration ms: 43533
explicit: false
by artist: Franz Lehár
by artist: Anton Niessner
by artist: Emmy Loose
by artist: Erich Kunz
by artist: Elisabeth Schwarzkopf
by artist: Nicolai Gedda
by artist: Otakar Kraus
by artist: Josef Schmidinger
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The Merry Widow: Act III, Finale "Ja, das Studium der Weiber ist schwer"
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  date published: 2026-07-31T03:15:04Z
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Die Fledermaus, Act III: No. 16, Finale. O Fledermaus, o Fledermaus
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duration: PT2M42S
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by artist: Erika Köth
by artist: Eberhard Wächter
by artist: Waldemar Kmentt
by artist: Hilde Gueden
by artist: Walter Berry
by artist: Giuseppe Zampieri
by artist: Regina Resnik
by artist: Peter Klein
by artist: Erich Kunz
by artist: Hedwig Schubert
by artist: Wiener Staatsopernchor
by artist: Wiener Philharmoniker
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  date published: 2026-07-08T03:20:19Z
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Die Zauberflöte, K. 620: Ouverture
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by artist: Wilma Lipp
by artist: Teresa Stich-Randall
by artist: Annelies Kupper
by artist: Elisabeth Lindermeier
by artist: Hanna Ludwig
by artist: Hilla Oppel
by artist: Gisela Litz
by artist: Kristina Sert
by artist: Erich Kunz
by artist: Kurt Marschner
by artist: Wilhelm Lückert
by artist: Walter Kreppel
by artist: Cologne Radio Chorus
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by artist: Joseph Keilberth
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  date published: 2026-07-08T08:56:20Z
audio: Die Zauberflöte, K. 620: Ouverture
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Die Fledermaus, Act III: No. 14, Couplet. Spiel' ich die Unschuld vom Lande
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duration: PT4M29S
duration ms: 269533
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by artist: Johann Strauss II
by artist: Erika Köth
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by artist: Waldemar Kmentt
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by artist: Peter Klein
by artist: Wiener Philharmoniker
by artist: Herbert von Karajan
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popularity: 4
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-29T23:42:34Z
audio: Die Fledermaus, Act III: No. 14, Couplet. Spiel' ich die Unschuld vom Lande
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Die Fledermaus, Act III: No. 15, Trio. Ich stehe voll Zagen
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duration: PT6M57S
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by artist: Erich Kunz
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by artist: Wiener Philharmoniker
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popularity: 4
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  date published: 2026-07-30T21:35:24Z
audio: Die Fledermaus, Act III: No. 15, Trio. Ich stehe voll Zagen
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Die Zauberflöte, K. 620: Act I: Arie: Der Vogelfanger bin ich ja (Papageno)
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by artist: Kurt Lieck
by artist: Josef Greindl
by artist: Rudolf Schock
by artist: Hans Hotter
by artist: Peter Esser
by artist: Horst Otto Rainer
by artist: Kathe Moller-Siepermann
by artist: Wilma Lipp
by artist: Teresa Stich-Randall
by artist: Annelies Kupper
by artist: Elisabeth Lindermeier
by artist: Hanna Ludwig
by artist: Hilla Oppel
by artist: Gisela Litz
by artist: Kristina Sert
by artist: Erich Kunz
by artist: Kurt Marschner
by artist: Wilhelm Lückert
by artist: Walter Kreppel
by artist: Cologne Radio Chorus
by artist: Cologne Radio Symphony Orchestra
by artist: Joseph Keilberth
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popularity: 4
genre: classical
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Die Zauberflöte, K. 620: Act II: Terzett: Seid uns zum zweiten Mal willkommen (Drei Knaben)
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Die Zauberflöte, K. 620: Act II: Finale: Bald prangt, den Morgen zu verkunden - Der, welcher wandert - Papagena! Papagena! Papagena! - Nur stille! Stille! Stille Stille!
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Strauss: Ariadne auf Naxos (Live)
type: MusicAlbum
date published: 2014-10-07

MASTERPIECES presents Wolfgang Amadeus Mozart: Die Zauberflöte
type: MusicAlbum
date published: 2014-03-25

Così fan tutte ossia / La scuola degli amanti
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date published: 2023-03-03

Mozart: Cosi fan tutte
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date published: 2000-01-01

Mozart: Così fan tutte, K. 588 (Live 1954)
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date published: 1954-01-01

Mozart: Die Zauberflöte, K. 620
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date published: 2014-09-01

Strauss II: The Gypsy Baron
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date published: 2009-03-31

J. Strauss II, The Gypsy Baron, Vol. 2
type: MusicAlbum
date published: 2000-01-01

J. Strauss II, The Gypsy Baron, Vol. 1
type: MusicAlbum
date published: 2000-01-01

Mozart: Don Giovanni, K. 527 (Remastered 2022) [Live]
type: MusicAlbum
date published: 2022-03-18

Die Meistersinger von Nürnberg the Broadcast Recording 05.08.1951 new HD Mastering in 2022
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date published: 2022-02-11

Kálmán: Der Zigeunerprimas
type: MusicAlbum
date published: 2014-09-05

Deutsch Universität Lieder
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date published: 2016-07-15

Wagner: Die Meistersinger von Nürnberg, WWV 96 [Live]
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date published: 2015-03-01

Wolfgang Amadeus Mozart: Le nozze di Figaro (1950)
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date published: 2014-10-29

Strauss: Die Fledermaus
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date published: 2010-04-01

Wagner: Die Meistersinger von Nürnberg
type: MusicAlbum
date published: 2009-10-01

Wienerlieder heiter und besinnlich
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date published: 2006-09-14

Dokumente einer Sängerkarriere - Erich Kunz
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date published: 2006-08-30
track: Nur für Natur (Der lustige Krieg)

Wiener Lieder
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date published: 2006-08-22
track: Es wird ein Wein sein
track: Es steht ein alter Nussbaum

Meistersinger von Nürnberg
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date published: 2006-08-15

Wien, Du Stadt Meiner Träume
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date published: 2006-08-10

Lehár: Das Land des Lächelns & Other Operetta Excerpts
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date published: 2005-08-01

Mozart: Don Giovanni, K. 527 (Live)
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date published: 2004

Lehár: The Merry Widow
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date published: 2003
track: The Merry Widow: Overture
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track: The Merry Widow: Act I, "Wie die Blumen in Lenze erblüh'n"
track: The Merry Widow: Act II, "Wie eine Rosenknospe"
track: The Merry Widow: Act II, "Nun wissen Sie, meine Herrschaften"
track: The Merry Widow: Act III, "Njegus, was ist das mit der Musik?"
track: The Merry Widow: Act III, "Ja, wir sind es, die Grisetten"
track: The Merry Widow: Act III, "Bei jedem Walzerschritt"
track: The Merry Widow: Act I, "Verehrteste Damen un Herren"
track: The Merry Widow: Act I, "Und jetzt, meine Herrschaften"
track: The Merry Widow: Act I, "So kommen Sie!...Ich bin eine anständ'ge Frau"
track: The Merry Widow: Act I, "Bitte meine Herr'n"
track: The Merry Widow: Act I, "Njegus, waren Sie beim Count Danilo?"
track: The Merry Widow: Act I, "Ach Njegus, Geliebter, wo ist Vaterland?"
track: The Merry Widow: Act I, "Damenwahl! Hört man rufen rings im Saal!"
track: The Merry Widow: Act II, "Ich bitte, hier jetzt zu verweilen"
track: The Merry Widow: Act II, "Nun lasst uns aber wie daheim...Viljalied"
track: The Merry Widow: Act II, "Heia, Mädel, aufgeschaut"
track: The Merry Widow: Act II, "Wie die Weiber?"
track: The Merry Widow: Act II, "Mein Freund, Vernunft!"
track: The Merry Widow: Act II, "Sieh dort den kleinen Pavillon"
track: The Merry Widow: Act II, "Die Baronin und Herr Rosillon sind im Pavillon"
track: The Merry Widow: Act II, "Ha! Ha!"
track: The Merry Widow: Act II, "Es waren zwei Königskinder"
track: The Merry Widow: Act III, "Gospodina, pravalni!"
track: The Merry Widow: Act III, Finale "Ja, das Studium der Weiber ist schwer"

Wiener Blut, Vol. 1
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Viennese Songs
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The Land Of Smiles, Vol. 2
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The Land Of Smiles, Vol. 1
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date published: 2000-01-01

Oper, Operette Und Wiener Lieder
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date published: 2000-01-01

A Night In Venice
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Le nozze di Figaro, K. 492 (Live)
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date published: 1957-01-01

Mozart: Le nozze di Figaro, K. 492 (Mono Version)
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date published: 1953

Kunz-Matinee
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date published: 2006-10-06

Wiener Blut, Vol. 2
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Don Giovanni
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