Louis Alter
type: MusicGroup
genre: expressionism
description: Louis Alter (June 18, 1902 – November 3, 1980) was an American pianist, songwriter and composer. At 13, he began playing piano in theaters showing silent films. He studied at the New England Conservat
popularity: 8
followers: 113
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  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
subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c6debef37985a93bddf2eda1c28161952854b953c9cff1bf657e749508e35a. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0ab96c22-6b05-4fa0-bd33-ca0fb78e46c1.json and https://artists.proofprofile.net/proofs/artist/0ab96c22-6b05-4fa0-bd33-ca0fb78e46c1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T13:28:01Z
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album: I Remember Old Russia
  type: MusicAlbum
  date published: 2015-01-01
track: Manhattan Serenade
track: Nina Never Knew - Remastered

Manhattan Serenade
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duration: PT4M46S
duration ms: 286560
explicit: false
by artist: Louis Alter
by artist: Victor Salon Orchestra
by artist: Nathaniel Shilkret
in album: Shilkret, Nathaniel: Skyscrapers Symphonic Jazz (1928-1932)
  type: MusicAlbum
  date published: 2003-01-11
isrc code: HKI190211102
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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  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
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subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6f2549995302d1e88f3eb6b8554b9abdd75f4339c0bd6a5bebb7f69a12f85f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/HKI190211102.
  date published: 2026-06-13T15:41:10Z
audio: Manhattan Serenade
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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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    value: F
  additional property: Mode Name
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Nina Never Knew - Remastered
type: MusicRecording
duration: PT2M55S
duration ms: 175066
explicit: false
by artist: Milton Drake
by artist: Louis Alter
by artist: Les Brown & His Band Of Renown
in album: Best Of The Capitol Years
  type: MusicAlbum
  date published: 2001-01-01
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T23:51:35Z
audio: Nina Never Knew - Remastered
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    value: C#
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    value: Major
isrc code: USCA20101187
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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