Clarinet Quintet in A Major, K. 581: IV. Allegretto con variazioni

Recording identifiers

ISRC

USBC19000157

Release date of the album this recording appears on

1991

CopyrightID (CopyrightChains transaction hash)

0x41329dd9cfe936e6d42220a89f8540c9c958d21ca0fe3760a169d4a49ddd3ae3

Copyright registration time

2026-07-06T09:13:27+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-07T14:04:01Z

Bitcoin block

957046

Canonical record hash

sha256:c38b3999f6b5b878982409b00fc600998f0c9ad5c8bfd6c2e7e8638a216a7953

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC USBC19000157

What this proof establishes

This recording was released in 1991, before generative AI. ProofProfile's catalogue derives from the pre-2022 AcousticBrainz and MusicBrainz source corpus, and 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.