String Quartet Opus 18 No. 6 In B Flat Major: Allegro Con Brio

Recording identifiers

ISRC

NLB150000902

CopyrightID (CopyrightChains transaction hash)

0x815599878e89dbc4c26e8dc5c52cd72b214dd584c7be64ed2e5df12898bd9ecc

Copyright registration time

2026-07-29T22:13:43+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-29T22:48:59Z

Bitcoin block

960160

Canonical record hash

sha256:5bbfeec8924b4e6e349fe1e7e91a1007ca891fc510434ecc9ac22eb74ef90551

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result

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.