Mozart: Flute Quartet No. 3 in C Major, K. 285b: II. (c) Variation II

Recording identifiers

ISRC

GBAYC9901382

Release date of the album this recording appears on

1999-08-01

CopyrightID (CopyrightChains transaction hash)

0x4b1f74c4c0d172328026ae3ee7f5e80995276346ccbbb5485ebbbd1d532516c6

Copyright registration time

2026-07-07T03:55:14+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-08T03:20:19Z

Bitcoin block

957118

Canonical record hash

sha256:4b9308f8be105e89820677ded091ef73b44212cb86b4f510735ff0dd5156fd6d

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
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• Recording evidence summary for ISRC GBAYC9901382

What this proof establishes

This recording was released in 1999, 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.