String Quartets, Op. 20, No. 1 in E-Flat Major, Hob. III:31: I. Allegro moderato

Recording identifiers

ISRC

FRX201644652

CopyrightID (CopyrightChains transaction hash)

0x7a81f4b0e2107b95d2f44b2caf4bd7948857fcb5e44fa2733ed902c030bf11ac

Copyright registration time

2026-07-07T08:27:45+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-08T03:20:19Z

Bitcoin block

957118

Canonical record hash

sha256:97d86503cf1074f023d6bc5899535b7f1055cd6b13358babab39fb17c5485867

• 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.