String Quartet No.15 in D Minor, K. 421: IV. Allegretto ma non troppo

Recording identifiers

ISRC

FR7JM2165040

CopyrightID (CopyrightChains transaction hash)

0xa751d789f91ecd373daf1f4c6b5053f563dccaa628f816da004df1cb504c9cf6

Copyright registration time

2026-07-07T23:25:08+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-08T03:22:41Z

Bitcoin block

957120

Canonical record hash

sha256:cf54952504767315d7ca4fa5f53fbda74f95bc268426e9f33ba9e6dda859d0a0

• 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.