Polonaise No. 6 in A-Flat Major, Op. 53 "Heroic": Maestoso

Recording identifiers

ISRC

DEF057900720

Release date of the album this recording appears on

2014-01-01

CopyrightID (CopyrightChains transaction hash)

0x914f2074b73d1eb4b3e9d1d7640c94cfe231274ef308a355f72aafa6543f3baf

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-31T13:50:38Z

Bitcoin block

960410

Canonical record hash

sha256:0212ca8fbb155bc424648ae807d88c8ba67809ac86ba78e2c98ddb87eada5b84

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC DEF057900720

What this proof establishes

This recording was released in 2014, 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.