String Quartet No. 4 in C minor, Op. 18 No. 4: 1. Allegro ma non tanto

Recording identifiers

ISRC

NLA507400602

Release date of the album this recording appears on

1989-01-01

CopyrightID (CopyrightChains transaction hash)

0xb0f0cc8da64dab67be1f2af8d5e959c13dfe065061ebcc8d62c9d469820963d4

Copyright registration time

2026-07-07T03:32:21+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-08T03:20:19Z

Bitcoin block

957118

Canonical record hash

sha256:e774d448fcdc5a195e38fcd48765db7a69d4ca016de0a1e8b085ea2940a054ff

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC NLA507400602

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.