Mazurkas, Op. 68: No. 2 in A Minor

Recording identifiers

ISRC

USBC19803048

CopyrightID (CopyrightChains transaction hash)

0x37111bf696ad10942557bf7a2bc10f0507b0f84e4149118d29adec657e239290

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-30T12:51:24Z

Bitcoin block

960259

Canonical record hash

sha256:6776e29fc2248941451be2593ee8d3a397182100d46b360f2b0d2d9cea6333e0

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result

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.