String Quartet No. 15 in D Minor, Op. X No. 2, K. 421: I. Allegro

Recording identifiers

ISRC

FR10S1706476

CopyrightID (CopyrightChains transaction hash)

0x8445f30dbccc0f3827cd8f76b6b14749dc8cae2b9322d021d2f90e481f259db2

Copyright registration time

2026-07-07T03:29:20+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-08T03:20:19Z

Bitcoin block

957118

Canonical record hash

sha256:77bcb033e9e2715c4e4520cec8dd27a234a777975173d26c42ce4abbf4d2b7fc

• 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.