Piano Quartet No. 2 in E flat, K.493: 2. Larghetto

Recording identifiers

ISRC

DEF058703992

CopyrightID (CopyrightChains transaction hash)

0x464420054b86fdcb9a34b3e912366e9d5621e21d903bb856e44ab521acfde231

Copyright registration time

2026-07-31T16:19:16+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-31T16:33:26Z

Bitcoin block

960435

Canonical record hash

sha256:7b7d65a17938b4e99ed14393d52989104a42e7383bf29d078a13a9a05ee55497

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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.