Duo for Violin and Viola in B flat, K.424: 1. Adagio - Allegro

Recording identifiers

ISRC

DEF058401311

Release date of the album this recording appears on

1985-01-01

CopyrightID (CopyrightChains transaction hash)

0x987f44be3f99508217406247e8485c3b74d24b0929301d968b69cb6c48fbb6a9

Copyright registration time

2026-07-07T02:40:13+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-08T03:20:19Z

Bitcoin block

957118

Canonical record hash

sha256:cef6a84e0c6e7d299438bcdededfd87cf10ab747d709ee895ead21ab617196f6

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC DEF058401311

What this proof establishes

This recording was released in 1985, 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.