Leon Stein
type: MusicGroup
description: Leon Stein (September 18, 1910 in Chicago – May 9, 2002 in Laguna Hills, California) was an American composer and music analyst. Stein attended DePaul University, where he achieved his MM in 1935 and
popularity: 2
followers: 31
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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  value: https://explorer.copyrightchains.com/tx/0x42295820dee84c949ce9ff97bd0faac8cc1161ce4275672f555ed77b8028e49a
additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953997
additional property: OTSProofURL
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  value: https://artists.proofprofile.net/proofs/artist/31a1df07-1ca0-4029-84b8-99f2c47fd369.ots
additional property: OTSRecordURL
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additional property: OTSVerificationAPI
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  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/31a1df07-1ca0-4029-84b8-99f2c47fd369
additional property: OTSTimestamp
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additional property: OTSCanonicalRecord
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  value: {"copyright_id":"0x42295820dee84c949ce9ff97bd0faac8cc1161ce4275672f555ed77b8028e49a","name":"Leon Stein","registered_at":"2026-06-16T06:50:32Z","symbol":"NIM0971425","token_address":"0x6e546c880e82b7573ac49efded14ef7af06a49d7","type":"artist","uuid":"31a1df07-1ca0-4029-84b8-99f2c47fd369"}
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 0x42295820dee84c949ce9ff97bd0faac8cc1161ce4275672f555ed77b8028e49a. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/31a1df07-1ca0-4029-84b8-99f2c47fd369.json and https://artists.proofprofile.net/proofs/artist/31a1df07-1ca0-4029-84b8-99f2c47fd369.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T20:07:57Z
  text: {"copyright_id":"0x42295820dee84c949ce9ff97bd0faac8cc1161ce4275672f555ed77b8028e49a","name":"Leon Stein","registered_at":"2026-06-16T06:50:32Z","symbol":"NIM0971425","token_address":"0x6e546c880e82b7573ac49efded14ef7af06a49d7","type":"artist","uuid":"31a1df07-1ca0-4029-84b8-99f2c47fd369"}
track: La veuve joyeuse - Air de Vilya: Air de Vilya
  type: MusicRecording
  duration: PT5M1S
  duration ms: 301600
  explicit: false
  by artist: Victor Leon
  by artist: Leon Stein
  by artist: Julie Fuchs
  by artist: Orchestre National de Lille
  by artist: Samuel Jean
  in album: Yes !
    type: MusicAlbum
    date published: 2015-09-11
  isrc code: FRUM71501786
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  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-31T20:22:46Z
  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 0x59ee03e59b7230f8875034e45d0f85428dfe57d8ef82503fcfd108699fcccc69. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/FRUM71501786.
    date published: 2026-07-31T20:22:46Z
  audio: La veuve joyeuse - Air de Vilya: Air de Vilya
    type: AudioObject
    additional property: Tempo (BPM)
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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)
      type: PropertyValue
      value: -21.465
    additional property: Key Name
      type: PropertyValue
      value: G
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: La veuve joyeuse - Heure exquise: Heure exquise
  type: MusicRecording
  duration: PT2M48S
  duration ms: 168786
  explicit: false
  by artist: Victor Leon
  by artist: Leon Stein
  by artist: Julie Fuchs
  by artist: Stanislas de Barbeyrac
  by artist: Orchestre National de Lille
  by artist: Samuel Jean
  in album: Yes !
    type: MusicAlbum
    date published: 2015-09-11
  isrc code: FRUM71501787
  additional property: CopyrightID
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  additional property: OTSVerificationAPI
    type: PropertyValue
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  additional property: OTSTimestamp
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    value: 2026-07-02T03:55:08Z
  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 0x5dab9c9c69d053ef3cc66b6f65563d3bb6757743c37be811cf7e5489def0a418. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRUM71501787.
    date published: 2026-07-02T03:55:08Z
  audio: La veuve joyeuse - Heure exquise: Heure exquise
    type: AudioObject
    additional property: Tempo (BPM)
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    additional property: Musical Key
      type: PropertyValue
      value: 7
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
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      value: 6
    additional property: Danceability
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    additional property: Energy
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    additional property: Speechiness
      type: PropertyValue
      value: 0.044
    additional property: Acousticness
      type: PropertyValue
      value: 0.966
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.075
    additional property: Liveness
    additional property: Valence (Positivity)
    additional property: Loudness (dB)
    additional property: Key Name
    additional property: Mode Name

Liveness
type: PropertyValue
value: 0.297

Valence (Positivity)
type: PropertyValue
value: 0.094

Loudness (dB)
type: PropertyValue
value: -22.573

Key Name
type: PropertyValue
value: G

Mode Name
type: PropertyValue
value: Major