Frederick Dvonch
type: MusicGroup
genre: doo-wop
popularity: 12
followers: 54
additional property: CopyrightID
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/953678
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/6386877b-9a03-4fe3-843c-5f5f33e720b2.ots
additional property: OTSRecordURL
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  value: https://artists.proofprofile.net/proofs/artist/6386877b-9a03-4fe3-843c-5f5f33e720b2.json
additional property: OTSVerificationAPI
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additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin 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
subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4489c2173b6dff0dfb45302c496ca0e80c243be5d697a0590d3450add665b10a. Chain 2 (Bitcoin): anchored in block 953678 (2026-06-14T19:23:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6386877b-9a03-4fe3-843c-5f5f33e720b2.json and https://artists.proofprofile.net/proofs/artist/6386877b-9a03-4fe3-843c-5f5f33e720b2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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track: Do I Hear a Waltz?: Do I Hear a Waltz?
  type: MusicRecording
  duration: PT3M42S
  duration ms: 222373
  explicit: false
  by artist: Richard Rodgers
  by artist: Elizabeth Allen
  by artist: Do I Hear a Waltz? Ensemble
  by artist: Frederick Dvonch
  by artist: Do I Hear a Waltz Original Broadway Cast
  by artist: Sergio Franchi
  by artist: Carol Bruce
  by artist: Madeleine Sherwood
  by artist: Julienne Marie
  by artist: Stuart Damon
  by artist: Fleury D'Antonakis
  by artist: Jack Manning
  by artist: James Dybas
  by artist: Christopher Votos
  in album: The Essential Stephen Sondheim
    type: MusicAlbum
    date published: 2016-02-26
  popularity: 3
  isrc code: USSM16501460
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    type: PropertyValue
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  additional property: OTSVerificationAPI
    type: PropertyValue
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  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-30T09:37:10Z
  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
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
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    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe974f3ece4f5c8e7afba92b2b96e56d742564de050915760c5cde8c5711549ed. 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/USSM16501460.
    date published: 2026-07-30T09:37:10Z
  audio: Do I Hear a Waltz?: Do I Hear a Waltz?
    type: AudioObject
    additional property: Tempo (BPM)
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      value: 1
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.357
    additional property: Energy
      type: PropertyValue
      value: 0.283
    additional property: Speechiness
      type: PropertyValue
      value: 0.03
    additional property: Acousticness
      type: PropertyValue
      value: 0.821
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.481
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.548
    additional property: Loudness (dB)
      type: PropertyValue
      value: -17.269
    additional property: Key Name
      type: PropertyValue
      value: C#
    additional property: Mode Name
      type: PropertyValue
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track: The Sound of Music
  type: MusicRecording
  duration: PT2M44S
  duration ms: 164066
  explicit: false
  by artist: Richard Rodgers
  by artist: Mary Martin
  by artist: Frederick Dvonch
  in album: Greatest Hits of Broadway
    type: MusicAlbum
    date published: 1996
  popularity: 1
  isrc code: USSM10407063
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
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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: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10407063
  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
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
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    date published: 2026-07-08T03:20:19Z
  audio: The Sound of Music
    type: AudioObject
    additional property: Tempo (BPM)
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    additional property: Danceability
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    additional property: Energy
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    additional property: Speechiness
    additional property: Acousticness
    additional property: Instrumentalness
    additional property: Liveness
    additional property: Valence (Positivity)
    additional property: Loudness (dB)
    additional property: Key Name
    additional property: Mode Name
track: The Sound of Music: Do-Re-Mi

Speechiness
type: PropertyValue
value: 0.049

Acousticness
type: PropertyValue
value: 0.958

Instrumentalness
type: PropertyValue
value: 0

Liveness
type: PropertyValue
value: 0.069

Valence (Positivity)
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value: 0.235

Loudness (dB)
type: PropertyValue
value: -20.012

Key Name
type: PropertyValue
value: D

Mode Name
type: PropertyValue
value: Major

The Sound of Music: Do-Re-Mi
type: MusicRecording
duration: PT5M51S
duration ms: 351413
explicit: false
by artist: Richard Rodgers
by artist: Mary Martin
by artist: Lauri Peters
by artist: William Snowden
by artist: Kathy Dunn
by artist: Joseph Stewart
by artist: Marilyn Rogers
by artist: Mary Susan Locke
by artist: Evanna Lien
by artist: Original Broadway Cast of The Sound of Music
by artist: Frederick Dvonch
in album: Broadway. Los Grandes Musicales
  type: MusicAlbum
  date published: 2013-03-19
isrc code: USSM15900836
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/USSM15900836
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913084098b65f881457e56a9d1801fa65e3a7d03381ced197f382a411b063915. 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/USSM15900836.
  date published: 2026-07-08T03:20:19Z
audio: The Sound of Music: Do-Re-Mi
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
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  additional property: Musical Key
    type: PropertyValue
    value: 0
  additional property: Mode (Major/Minor)
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  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
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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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