String Quartet No. 21 in D Major, K. 575 "Prussian No. 1": II. Andante

Recording identifiers

ISRC

USSM11103448

CopyrightID (CopyrightChains transaction hash)

0xf1ac790a7f32ddcdc7ddea20f4802ae992b66d526daffee32a27cf4a24e8f56a

Copyright registration time

2026-07-06T21:26:10+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-08T03:20:19Z

Bitcoin block

957118

Canonical record hash

sha256:d8a135405e9c5e39996157b1f5fd467819eed2a6dcffee528b65e23b33fa7cb0

• Verify the CopyrightID on CopyrightChains
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What this proof establishes

This recording belongs to ProofProfile's historical evidence base derived from the pre-2022 AcousticBrainz and MusicBrainz corpus. ISRC is the stable recording-level bridge from that source corpus to the authoritative cc-db-prod track record.

CopyrightChains and Bitcoin OpenTimestamps make the exact committed record independently verifiable today. The cryptographic proof does not by itself establish authorship or ownership of the underlying recording.

Read the complete pre-generative-AI provenance and verification method.