Polonaises, Op. 71: 1. Allegro maestoso In D Minor

Recording identifiers

ISRC

DEF050702190

Release date of the album this recording appears on

2018-10-26

CopyrightID (CopyrightChains transaction hash)

0xe3794e080a03061fbdf508e29643fd56c8657e82bc8a196fbe76c4a9ce885aec

Copyright registration time

2026-07-31T00:52:38+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-31T02:19:15Z

Bitcoin block

960334

Canonical record hash

sha256:c1ae84cb6b5617838c48f81485ca6812729f5418d4e9ae1cf4b2fb4d0a1a5440

• Verify the CopyrightID on CopyrightChains
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• Recording evidence summary for ISRC DEF050702190

What this proof establishes

This recording was released in 2018, 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.