Piano Quartet No. 2 in E-Flat Major, K. 493: III. Allegretto

Recording identifiers

ISRC

USB8U1709425

CopyrightID (CopyrightChains transaction hash)

0x31f11657b96ca1a29ee87674db992654c8bbeeb58cbaae043bc2e672536b070a

Copyright registration time

2026-07-07T16:24:57+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-08T03:20:19Z

Bitcoin block

957118

Canonical record hash

sha256:9bfe65dac6dda8bc84b83149c714134ecc0f35a33d47ce5623f6745d45cc3be5

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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.