Powrót do przeszłości

Recording by Polska Wersja.

Recording identifiers

ISRC
PLC061705644
CopyrightID (CopyrightChains transaction hash)
0x81eb1437be39f32c771b2a053c1bd8a82e9b4de5f2c1a8f4044f2ae476fc779c
Copyright registration time
2026-06-10T06:32:23+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-06-13T13:32:09Z
Bitcoin block
953520
Canonical record hash
sha256:268c8486807ddeda9680e9db901977d374df0cca8e5b954cf536737414b0b112

What this proof establishes

This recording belongs to ProofProfile's historical evidence base derived from the pre-2022 AcousticBrainz and MusicBrainz corpus. 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.