Till the End of Time (Polonaise in a Flat)

Recording identifiers

ISRC

USRDG0112128

Release date of the album this recording appears on

2008-08-01

CopyrightID (CopyrightChains transaction hash)

0x5943c6ac5964a91de737069f669bbc684fde81ba8c3158a97e4f2d7d7d7f5866

Copyright registration time

2026-07-07T10:55:36+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-08T03:20:19Z

Bitcoin block

957118

Canonical record hash

sha256:673c2baf236f4c75306ca333b6f9260ca75bc77c1dc5ef5163ae562e970448c0

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC USRDG0112128

What this proof establishes

This recording was released in 2008, 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.