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subject of: OpenTimestamps Proof of Existence
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album: Echoes of Eternity - Lieder and Song Cycles for Baritone by Brahms, Martin & Schubert
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track: Stabat Mater, Op. 58: I. Stabat Mater dolorosa
track: Stabat Mater, Op. 58: IV. Fac, ut ardeat cor meum
track: Così fan tutte, K.588, Act I: Sextetto. "Alla bella Despinetta"
track: Le nozze di Figaro, K.492, Act IV: Finale. Scena ultima. "Gente gente, all"armi, all"armi!"
track: Stabat Mater, Op. 58: II. Quis est homo
track: Stabat Mater, Op. 58: X. Quando corpus morietur

Stabat Mater, Op. 58: I. Stabat Mater dolorosa
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by artist: Antonín Dvořák
by artist: Polina Pastirchák
by artist: Anke Vondung
by artist: Sungmin Song
by artist: Milan Siljanov
by artist: Florian Helgath
by artist: Chorwerk Ruhr
by artist: Bochumer Symphoniker
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additional property: OTSVerifyInstructions
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  date published: 2026-07-08T03:22:41Z
audio: Stabat Mater, Op. 58: I. Stabat Mater dolorosa
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Stabat Mater, Op. 58: IV. Fac, ut ardeat cor meum
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T08:56:20Z
audio: Stabat Mater, Op. 58: IV. Fac, ut ardeat cor meum
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Così fan tutte, K.588, Act I: Sextetto. "Alla bella Despinetta"
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by artist: Antonello Manacorda
by artist: Julie Roset
by artist: Amitai Pati
by artist: Ashley Dixon Santelli
by artist: Milan Siljanov
by artist: Samuel Dale Johnson
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-30T21:35:24Z
audio: Così fan tutte, K.588, Act I: Sextetto. "Alla bella Despinetta"
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additional property: OTSVerifyInstructions
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Le nozze di Figaro, K.492, Act IV: Finale. Scena ultima. "Gente gente, all"armi, all"armi!"
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by artist: Milan Siljanov
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by artist: Paweł Horodyski
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  date published: 2026-07-31T17:29:52Z
audio: Le nozze di Figaro, K.492, Act IV: Finale. Scena ultima. "Gente gente, all"armi, all"armi!"
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Stabat Mater, Op. 58: II. Quis est homo
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  date published: 2026-08-01T00:10:46Z
audio: Stabat Mater, Op. 58: II. Quis est homo
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Stabat Mater, Op. 58: X. Quando corpus morietur
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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 0xa08e0655628688e97178460d2d670c59055c7e7eb3556130ab0bc1993fc8e9d5. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DEX992492410.
  date published: 2026-07-31T23:30:38Z
audio: Stabat Mater, Op. 58: X. Quando corpus morietur
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 94.337
  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: 0.186
  additional property: Energy
    type: PropertyValue
    value: 0.213
  additional property: Speechiness
    type: PropertyValue
    value: 0.036
  additional property: Acousticness
    type: PropertyValue
    value: 0.958
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.075
  additional property: Liveness
    type: PropertyValue
    value: 0.105
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.049
  additional property: Loudness (dB)
    type: PropertyValue
    value: -20.206
  additional property: Key Name
    type: PropertyValue
    value: D
  additional property: Mode Name
    type: PropertyValue
    value: Major
isrc code: DEX992492410
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: 960478
additional property: BitcoinTime
  type: PropertyValue
  value: 2026-07-31T23:30:38+00:00
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEX992492410
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960478
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960478
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T23:30:38+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