Mazurka No. 19 in B Minor, Op. 30 No. 2: Allegretto

Recording identifiers

ISRC

DEF057100430

Release date of the album this recording appears on

2010-01-01

CopyrightID (CopyrightChains transaction hash)

0x981ba1f1de40b4e6015d9352c7065e21bcc0a814d301ca18bf8810e92e592e93

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-31T13:04:34Z

Bitcoin block

960403

Canonical record hash

sha256:a1ba25adb954f15f4ea3cbf98bfc8fd25bb37e0c299247d996346676589c910a

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC DEF057100430

What this proof establishes

This recording was released in 2010, 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.