Jef

Recording by Michał Bajor.

Recording identifiers

ISRC
PLB171100736
CopyrightID (CopyrightChains transaction hash)
0x5eae6710b5a6cb27790bd208faf2a9aacbd85c021322b24ea7df17169c40d54d
Copyright registration time
2026-07-06T09:52:15+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-07-07T16:43:21Z
Bitcoin block
957065
Canonical record hash
sha256:7bcf7f7a760f8e675d600084de1c23e4f876194094ccbca9ac3c6e4da193fecc

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.