Czas na zabawa
Recording by Claudia & Kasia Chwołka.
Recording identifiers
- ISRC
- PLJ621000039
- CopyrightID (CopyrightChains transaction hash)
- 0x499955a484138fac9a557a43930aed1ce6d9bd33c40d333ee0aa8a3a431f54c8
- Copyright registration time
- 2026-07-07T21:19:18+00:00
OpenTimestamps proof evidence
- Bitcoin-attested timestamp
- 2026-07-08T03:22:41Z
- Bitcoin block
- 957120
- Canonical record hash
- sha256:f061cecd9cbe73164c61dfff713db1bec5a35bcf14721d0ed42163adac1848c7
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.