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

Recording identifiers

ISRC

GBF076310224

Release date of the album this recording appears on

1964

CopyrightID (CopyrightChains transaction hash)

0x05bc9bcddd7498b5c7b049e5c2df274fa53b11f7ec1d6ffe3353447f5ced96cd

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-08-01T03:13:03Z

Bitcoin block

960500

Canonical record hash

sha256:d05901f297480df52c1714784cc6a6d175c7078b38ec57d519266b0c1cd60d2c

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC GBF076310224

What this proof establishes

This recording was released in 1964, 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.