Letter to the Father

Recording by Zbigniew Preisner.

Recording identifiers

ISRC
PLX352100023
CopyrightID (CopyrightChains transaction hash)
0xa8606d3edb4dab63e7652b6b846a906b70954d2ad87532bd57030c7e48d3deaf
Copyright registration time
2026-07-31T02:18:19+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-07-31T02:51:48Z
Bitcoin block
960337
Canonical record hash
sha256:b6ef3a0b51364388392cdfdee59a561b8661bcf480804817333493a2f7c89f66

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.