Polonaise-Fantaisie in A-Flat Major, Op. 61

Recording identifiers

ISRC

DEF057502350

Release date of the album this recording appears on

2016-12-30

CopyrightID (CopyrightChains transaction hash)

0x47cc5c35910d22d710b2816215996c5ce60c3fcb04e47d08ae099b7e5b63a1c0

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-08-01T00:40:43Z

Bitcoin block

960489

Canonical record hash

sha256:0bd993ccdb9c1b59cc392e23d6e668f555509ca93cc092917077ee8ef6988344

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC DEF057502350

What this proof establishes

This recording was released in 2016, 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.