Joel Sachs
type: MusicGroup
genre: avant-garde
popularity: 15
followers: 85
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additional property: OTSVerifyInstructions
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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 0x43166f41cea8e8b1317451ba225236e079f670debd1d4c58a37f0e0307438e93. Chain 2 (Bitcoin): anchored in block 953733 (2026-06-15T03:12:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/97554d53-ef6c-4e2b-b649-3690ef876244.json and https://artists.proofprofile.net/proofs/artist/97554d53-ef6c-4e2b-b649-3690ef876244.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T03:12:39Z
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album: Chamber Music (Latin American) - Aguila, M. Del / Marquez, A. / Nancarrow, C. (Conga-Line in Hell - Modern Classics From Latin America)
  type: MusicAlbum
  date published: 1999-01-01
album: Chamber Music (Latin American) - Aguila, M. Del / Marquez, A. / Nancarrow, C. (Conga-Line in Hell - Modern Classics From Latin America)
  type: MusicAlbum
  date published: 1999-01-01
album: KOPS 127.1 FM
  type: MusicAlbum
  date published: 2012-04-23
album: KOPS 127.1 FM
  type: MusicAlbum
  date published: 2012-04-23
track: Homage to Iran: I. Andante rubato

Homage to Iran: I. Andante rubato
type: MusicRecording
duration: PT6M46S
duration ms: 406440
explicit: false
by artist: Henry Cowell
by artist: Mark Steinberg
by artist: Joel Sachs
by artist: Cheryl Seltzer
by artist: Continuum
in album: Cowell: Homage To Iran / Piano Pieces / Set of Five / Six Casual Developments / Two Songs
  type: MusicAlbum
  date published: 2005-02-01
isrc code: HKI190351901
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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
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subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207c560956d49a41a3402cd3c1f1f18b36237de5fbc4e84174b5dd99013520dd. 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/HKI190351901.
  date published: 2026-07-08T08:56:20Z
audio: Homage to Iran: I. Andante rubato
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Key Name
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    value: A
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