String Quartet No. 6 in B flat, Op. 18 No. 6: 1. Allegro con brio

Recording identifiers

ISRC

NLA507300509

CopyrightID (CopyrightChains transaction hash)

0x91d893e6da06e98f528e44096df230a8a4261980a467586bc6e8462ddd618bd7

Copyright registration time

2026-07-31T05:56:32+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-31T06:42:11Z

Bitcoin block

960360

Canonical record hash

sha256:fa0f0da0243a853f84af0b9b8c60ddbaa4c43178bb4ae459e88ededd7181e8fe

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
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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.