Mazurka No. 4 in F Minor, Op. 68

Recording identifiers

ISRC

USBC19300505

Release date of the album this recording appears on

1994

CopyrightID (CopyrightChains transaction hash)

0x6bdfa9de37e4902cb38af55e2cdd54fe88964199dc15dd8118a362948eacf4fe

Copyright registration time

2026-07-06T04:47:39+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-06T06:56:49Z

Bitcoin block

956889

Canonical record hash

sha256:54902928590bc37e7db70b93c52ae5994b860a00ddef1186816350a13719a770

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC USBC19300505

What this proof establishes

This recording was released in 1994, 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.