Sonata (Duo) for Bassoon and Cello in B-Flat Major, K. 292 (Attrib. Doubtful): II. Andante

Recording identifiers

ISRC

NLA508721505

Release date of the album this recording appears on

1989-01-01

CopyrightID (CopyrightChains transaction hash)

0x8f4e89f3458cbbcd7a172617e3c799657ef0b05afcf036f1c317ade902749fc9

Copyright registration time

2026-07-06T10:14:57+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-07T16:54:37Z

Bitcoin block

957067

Canonical record hash

sha256:4b4cf34144f882dbfdeb5fdd8512406c4fd2739ca06c1913dc0b6e26d6fb4dc4

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC NLA508721505

What this proof establishes

This recording was released in 1989, 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.