String Quartet No. 13 in D Minor, K. 173: II. Andantino grazioso

Recording identifiers

ISRC

NLA507200610

CopyrightID (CopyrightChains transaction hash)

0x15384b6f031cb07f22627b49acd8953b5b94f0cf626cb51b5120c473c0c830fe

Copyright registration time

2026-07-29T18:21:38+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-29T19:35:34Z

Bitcoin block

960138

Canonical record hash

sha256:cad771846103a8704711cc6cce490753b4132f170f7bf152cc1c2c554da7f820

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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.