Polonaise in G-Flat Major, KK IVa/8 - Excerpt

Recording identifiers

ISRC

GBUM72406491

Release date of the album this recording appears on

2025-02-28

CopyrightID (CopyrightChains transaction hash)

0xe9f6952b152ca719a081d98d1cc2b91f306c9edc6270a3e21c8ab98646db5121

Copyright registration time

2026-06-18T10:53:26+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-07T20:41:57Z

Bitcoin block

957084

Canonical record hash

sha256:166b8e43b0f457be75608bfc8b09d0f69479452531f366ce4608bba75cdce7cb

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC GBUM72406491

What this proof establishes

This recording was released in 2025. ProofProfile's artist catalogue derives from the pre-2022 AcousticBrainz and MusicBrainz source corpus, and this recording entered the record through cc-db-prod's ISRC-linked registration. Its provenance rests on the dates stated above rather than on the era of that source corpus.

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.