String Quartet In E Flat, Hob. III:38, Op. 33 No. 2: 3. Largo sostenuto

Recording identifiers

ISRC

DEN960000853

CopyrightID (CopyrightChains transaction hash)

0xc20088645c0e793a45475e69751e8c0c7c609dae66b7b942a101f2e62d6907bd

Copyright registration time

2026-06-20T23:05:40+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-02T03:30:09Z

Bitcoin block

956302

Canonical record hash

sha256:6eded828d1863b6588b5ac84f4b21651ab412c47a3d0dc290cf6b406dd3a7f81

• Verify the CopyrightID on CopyrightChains
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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.