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description: thumb|Irmgard Seefried (1962) Irmgard Seefried (9 October 191924 November 1988) was a distinguished German soprano who sang opera, sacred music, and lieder. Maria Theresia Irmgard Seefried was born
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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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Das Kinderspiel, K. 598
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Sehnsucht nach dem Frühling, K. 696
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Fischerweise, D. 881
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af542be71c7a65c335a875dd6905aaad3246292f4e1e4e023e5c25a588d8f3c. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF055802680.
  date published: 2026-07-31T00:26:26Z
audio: Fischerweise, D. 881
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isrc code: DEF055802680
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

Matthäus-Passion, BWV 244, Pt. 1: No. 13, Aria. Ich will dir mein Herz schenken (Soprano)
type: MusicRecording
duration: PT4M2S
duration ms: 242294
explicit: false
by artist: Johann Sebastian Bach
by artist: Irmgard Seefried
by artist: Münchener Bach-Orchester
by artist: Karl Richter
in album: Irmgard Seefried sings Sacred Arias
  type: MusicAlbum
  date published: 2025-01-17
genre: classical
genre: classical-piano
isrc code: DEF055830328
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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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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  value: 2026-07-07T08:25:35+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
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9761a2fb19d226b809c2123e70f9b7d8b4cbcd89a893ae6479a313110e4bb65. 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/DEF055830328.
  date published: 2026-07-08T03:22:41Z
audio: Matthäus-Passion, BWV 244, Pt. 1: No. 13, Aria. Ich will dir mein Herz schenken (Soprano)
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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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Die Schöpfung, Hob. XXI:2, Pt. 1: No. 8, Aria. Nun beut die Flur das frische Grün
type: MusicRecording
duration: PT5M14S
duration ms: 314773
explicit: false
by artist: Joseph Haydn
by artist: Irmgard Seefried
by artist: Berliner Philharmoniker
by artist: Igor Markevitch
in album: Irmgard Seefried sings Sacred Arias
  type: MusicAlbum
  date published: 2025-01-17
isrc code: DEF055530709
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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additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF055530709
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
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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 0x2645fcabaae0145487a979abac8dd53631ef691f2c02b370ba6476c3577e98c8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEF055530709.
  date published: 2026-07-08T08:56:20Z
audio: Die Schöpfung, Hob. XXI:2, Pt. 1: No. 8, Aria. Nun beut die Flur das frische Grün
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  additional property: Tempo (BPM)
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  additional property: Valence (Positivity)
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  additional property: Key Name
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  additional property: Mode Name
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Die Schöpfung, Hob. XXI:2, Pt. 3: No. 30, Duet. Von deiner Güt', o Herr und Gott – Chorus. Gesegnet sei des Herren Macht
type: MusicRecording
duration: PT10M23S
duration ms: 623612
explicit: false
by artist: Joseph Haydn
by artist: Irmgard Seefried
by artist: Kim Borg
by artist: Berliner Philharmoniker
by artist: Igor Markevitch
by artist: Chor der St. Hedwigs-Kathedrale Berlin
in album: Irmgard Seefried sings Sacred Arias
  type: MusicAlbum
  date published: 2025-01-17
isrc code: DEF055530728
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
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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
  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/DEF055530728
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
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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 0xc96dbedfbf5d09da200b38feb45806fb16292118ef587ae7bb26e457401107d5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEF055530728.
  date published: 2026-07-08T08:56:20Z
audio: Die Schöpfung, Hob. XXI:2, Pt. 3: No. 30, Duet. Von deiner Güt', o Herr und Gott – Chorus. Gesegnet sei des Herren Macht
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  additional property: Valence (Positivity)
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Matthäus-Passion, BWV 244, Pt. 1: No. 8, Aria. Blute nur, du liebes Herz (Soprano)
type: MusicRecording
duration: PT5M31S
duration ms: 331182
explicit: false
by artist: Johann Sebastian Bach
by artist: Irmgard Seefried
by artist: Münchener Bach-Orchester
by artist: Karl Richter
in album: Irmgard Seefried sings Sacred Arias
  type: MusicAlbum
  date published: 2025-01-17
genre: classical
genre: classical-piano
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd3de0579ba408db029906927db8135be773cd2a48ec932f91e2403ff67cd22. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/DEF055830302.
  date published: 2026-07-30T20:35:49Z
audio: Matthäus-Passion, BWV 244, Pt. 1: No. 8, Aria. Blute nur, du liebes Herz (Soprano)
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 108.647
  additional property: Musical Key
    type: PropertyValue
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  additional property: Mode (Major/Minor)
    type: PropertyValue
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  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.257
  additional property: Energy
    type: PropertyValue
    value: 0.135
  additional property: Speechiness
    type: PropertyValue
    value: 0.039
  additional property: Acousticness
    type: PropertyValue
    value: 0.907
  additional property: Instrumentalness
    type: PropertyValue
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  additional property: Liveness
    type: PropertyValue
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  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.116
  additional property: Loudness (dB)
    type: PropertyValue
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  additional property: Key Name
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  additional property: Mode Name
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isrc code: DEF055830302
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
  type: PropertyValue
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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

Matthäus-Passion, BWV 244, Pt. 1: No. 12, Recit. Wiewohl mein Herz in Tränen schwimmt (Soprano)
type: MusicRecording
duration: PT1M34S
duration ms: 94173
explicit: false
by artist: Johann Sebastian Bach
by artist: Irmgard Seefried
by artist: Münchener Bach-Orchester
by artist: Karl Richter
in album: Irmgard Seefried sings Sacred Arias
  type: MusicAlbum
  date published: 2025-01-17
genre: classical
genre: classical-piano
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eabac32d7cf6e4b404db4ad5dd5602848ffe2249bfed1a6e9194df53a8c5dc2. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF055830327.
  date published: 2026-07-31T02:51:48Z
audio: Matthäus-Passion, BWV 244, Pt. 1: No. 12, Recit. Wiewohl mein Herz in Tränen schwimmt (Soprano)
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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
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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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    value: 0.949
  additional property: Instrumentalness
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  additional property: Liveness
    type: PropertyValue
    value: 0.173
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.041
  additional property: Loudness (dB)
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isrc code: DEF055830327
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
  type: PropertyValue
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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

Die Schöpfung, Hob. XXI:2, Pt. 1: No. 4, Solo. Mit Staunen sieht das Wunderwerk – Chorus. Und laut ertönt aus ihren Kehlen
type: MusicRecording
duration: PT2M5S
duration ms: 125176
explicit: false
by artist: Joseph Haydn
by artist: Irmgard Seefried
by artist: Berliner Philharmoniker
by artist: Igor Markevitch
by artist: Chor der St. Hedwigs-Kathedrale Berlin
in album: Irmgard Seefried sings Sacred Arias
  type: MusicAlbum
  date published: 2025-01-17
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b70c2877cbdd86f3bef042fb4c81482042f508586b670d3c4abe92decb439ba. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/DEF055530705.
  date published: 2026-07-31T23:51:35Z
audio: Die Schöpfung, Hob. XXI:2, Pt. 1: No. 4, Solo. Mit Staunen sieht das Wunderwerk – Chorus. Und laut ertönt aus ihren Kehlen
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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
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  additional property: Instrumentalness
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isrc code: DEF055530705
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
  type: PropertyValue
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T23:51:35+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

Die Schöpfung, Hob. XXI:2, Pt. 1: No. 5, Recit. Und Gott sprach: Es sammle sich das Wasser
type: MusicRecording
duration: PT0M37S
duration ms: 37500
explicit: false
by artist: Joseph Haydn
by artist: Irmgard Seefried
by artist: Berliner Philharmoniker
by artist: Igor Markevitch
in album: Irmgard Seefried sings Sacred Arias
  type: MusicAlbum
  date published: 2025-01-17
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a45249c52adf09aa4de417c8746ad97ff4e62061b5d0a67507beefcd25c5b8d. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/DEF055530708.
  date published: 2026-07-31T19:53:57Z
audio: Die Schöpfung, Hob. XXI:2, Pt. 1: No. 5, Recit. Und Gott sprach: Es sammle sich das Wasser
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  additional property: Loudness (dB)
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    value: -24.809
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isrc code: DEF055530708
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
  type: PropertyValue
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T19:53:57+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

Die Schöpfung, Hob. XXI:2, Pt. 2: No. 15, Aria. Auf starkem Fittiche schwinget sich der Adler stolz
type: MusicRecording
duration: PT7M29S
duration ms: 449680
explicit: false
by artist: Joseph Haydn
by artist: Irmgard Seefried
by artist: Berliner Philharmoniker
by artist: Igor Markevitch
in album: Irmgard Seefried sings Sacred Arias
  type: MusicAlbum
  date published: 2025-01-17
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27de5d3b9b9ab8f980e07c152b19b67fd5c28d9f6738caeb4abf01a226876f0. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEF055530716.
  date published: 2026-07-31T18:48:12Z
audio: Die Schöpfung, Hob. XXI:2, Pt. 2: No. 15, Aria. Auf starkem Fittiche schwinget sich der Adler stolz
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  additional property: Loudness (dB)
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isrc code: DEF055530716
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

Messe solennelle de Sainte-Cécile, CG 56: II. Gloria
type: MusicRecording
duration: PT3M43S
duration ms: 223021
explicit: false
by artist: Charles Gounod
by artist: Irmgard Seefried
by artist: Gerhard Stolze
by artist: Hermann Uhde
by artist: Czech Philharmonic
by artist: Igor Markevitch
by artist: Czech Chorus, Prague
by artist: Josef Veselka
in album: Irmgard Seefried sings Sacred Arias
  type: MusicAlbum
  date published: 2025-01-17
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 0xbc25d07dd62f995a2949f09e676ff57d9506119449686c98258a304eeaca14cf. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEF056501064.
  date published: 2026-07-31T12:24:41Z
audio: Messe solennelle de Sainte-Cécile, CG 56: II. Gloria
  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
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    value: 5
  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
    type: PropertyValue
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  additional property: Instrumentalness
    type: PropertyValue
    value: 0.224
  additional property: Liveness
    type: PropertyValue
    value: 0.036
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.079
  additional property: Loudness (dB)
    type: PropertyValue
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isrc code: DEF056501064
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
  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

Mörike-Lieder: No. 24, In der Frühe
type: MusicRecording
duration: PT2M9S
duration ms: 129692
explicit: false
by artist: Hugo Wolf
by artist: Irmgard Seefried
by artist: Erik Werba
in album: Wolf: Mörike Lieder; Italienisches Liederbuch (selections)
  type: MusicAlbum
  date published: 2025-01-17
genre: post-romantic-era
isrc code: DEF055902710
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
  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/DEF055902710
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 0xb3efa34cf1b738031f5150a867cc1a5b47f5a6bf55d6cbe7bbf48d627d7ab899. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEF055902710.
  date published: 2026-07-08T08:56:20Z
audio: Mörike-Lieder: No. 24, In der Frühe
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  additional property: Tempo (BPM)
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  additional property: Loudness (dB)
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  additional property: Key Name
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    type: PropertyValue
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Mörike-Lieder: No. 12, Verborgenheit
type: MusicRecording
duration: PT2M42S
duration ms: 162376
explicit: false
by artist: Hugo Wolf
by artist: Irmgard Seefried
by artist: Erik Werba
in album: Wolf: Mörike Lieder; Italienisches Liederbuch (selections)
  type: MusicAlbum
  date published: 2025-01-17
genre: post-romantic-era
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabdfdd799e567c0cd5a06f9c7ce241a9385973f69feb3bd9ee9e0649bc860c7c. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DEF055902650.
  date published: 2026-07-31T17:29:52Z
audio: Mörike-Lieder: No. 12, Verborgenheit
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 135.268
  additional property: Musical Key
    type: PropertyValue
    value: 3
  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: 0.345
  additional property: Energy
    type: PropertyValue
    value: 0.094
  additional property: Speechiness
    type: PropertyValue
    value: 0.046
  additional property: Acousticness
    type: PropertyValue
    value: 0.993
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.116
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.048
  additional property: Loudness (dB)
    type: PropertyValue
    value: -20.491
  additional property: Key Name
    type: PropertyValue
    value: Eb
  additional property: Mode Name
    type: PropertyValue
    value: Major
isrc code: DEF055902650
additional property: CopyrightID
additional property: ProofProfileEvidenceStatus
  type: PropertyValue
  value: verified-cc-db-prod
additional property: TokenDeploymentConfirmed
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additional property: ContentHash
additional property: BitcoinBlock
  type: PropertyValue
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additional property: BitcoinTime
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additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF055902650
additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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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

Mörike-Lieder: No. 35, Frage und Antwort
type: MusicRecording
duration: PT1M37S
duration ms: 97530
explicit: false
by artist: Hugo Wolf
by artist: Irmgard Seefried
by artist: Erik Werba
in album: Wolf: Mörike Lieder; Italienisches Liederbuch (selections)
  type: MusicAlbum
  date published: 2025-01-17
genre: post-romantic-era
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ff591d64997bf5192705a2d881780f5ccf894213df037536f24d77a082233c. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/DEF055902750.
  date published: 2026-07-31T09:09:19Z
audio: Mörike-Lieder: No. 35, Frage und Antwort
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Musical Key
    type: PropertyValue
    value: 8
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.482
  additional property: Energy
    type: PropertyValue
    value: 0.079
  additional property: Speechiness
    type: PropertyValue
    value: 0.04
  additional property: Acousticness
    type: PropertyValue
    value: 0.991
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.105
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.106
  additional property: Loudness (dB)
    type: PropertyValue
    value: -17.221
  additional property: Key Name
    type: PropertyValue
    value: Ab
  additional property: Mode Name
    type: PropertyValue
    value: Major
isrc code: DEF055902750
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
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additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960376
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T09:09:19+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 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

Mörike-Lieder: No. 39, Denk es, O Seele
type: MusicRecording
duration: PT3M12S
duration ms: 192076
explicit: false
by artist: Hugo Wolf
by artist: Irmgard Seefried
by artist: Erik Werba
in album: Wolf: Mörike Lieder; Italienisches Liederbuch (selections)
  type: MusicAlbum
  date published: 2025-01-17
genre: post-romantic-era
subject of: OpenTimestamps Proof of Existence
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Mozart: Requiem, K. 626
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Der König der Klavierbegleiter, Vol. 10
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Mozart: Die Zauberflöte, K. 620
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Wolf: Lieder
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Legenden des Gesanges, Vol. 12: Irmgard Seefried (1943-1954)
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Brahms: Ein deutsches Requiem, Op. 45
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Irmgard Seefried - Lieder
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track: Sehnsucht nach dem Frühling, K. 696
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Nacht Voller Wunder
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Schubert, Brahms & Verdi: Vocal Works
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Johann Sebastian Bach : Matthäus-Passion BWV 244
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Bach: Passio Sedundum Matthaeum
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Wolfgang Amadeus Mozart: Don Giovanni
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Mozart: Requiem
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Lieder Von Richard Strauss
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Le Nozze Di Figaro
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Haydn: Die Schöpfung
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Ariadne Auf Naxos
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Mozart: Requiem K.626
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Brahms: Ein deutsches Requiem, Op. 45 (Remastered)
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Irmgard Seefried sings Sacred Arias
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Brahms: Liebeslieder-Walzer; Neue Liebeslieder-Walzer
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Irmgard Seefried - Romantic Heroines
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Irmgard Seefried sings Mozart
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Schubert, Brahms, Strauss, Wolf, Reger: Lieder; Hindemith: 3 Geistliche Motetten; Egk: Quattro canzoni
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Brahms: Ein deutsches Requiem, Op. 45
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track: Mörike-Lieder: No. 12, Verborgenheit
track: Mörike-Lieder: No. 35, Frage und Antwort
track: Mörike-Lieder: No. 39, Denk es, O Seele

J.S. Bach: Cantata BWV 202; Respighi: Il tramonto; Mozart: Divertimento K. 138, Così fan tutte (arias)
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Irmgard Seefried sings Handel & Mozart
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Irmgard Seefried sings Beethoven & Richard Strauss
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Brahms, Richard Strauss, Cornelius: Lieder
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