Jef

Recording by Michał Bajor.

Recording identifiers

ISRC
PLB382000295
CopyrightID (CopyrightChains transaction hash)
0x44428832ce0c6fc7fd6a01feb00d8ea1f6c7f6e6dac3694b6e37bcaffcb8d54c
Copyright registration time
2026-07-29T13:50:01+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-07-29T14:28:24Z
Bitcoin block
960117
Canonical record hash
sha256:eff8d78efa628b67fc14f33de86310122b00a75b177100b2dc1f89e47bac9ab8

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.