Penumbra

Recording by Jo Blankenburg.

Recording identifiers

ISRC
US43C1619050
CopyrightID (CopyrightChains transaction hash)
0x69dcff2628bff2518277c8337f45e062c30652c0a87fb935ee5b7149f555687a
Copyright registration time
2026-06-27T18:05:19+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-07-02T03:55:08Z
Bitcoin block
956304
Canonical record hash
sha256:2906f530405444ebe3b567138f04259a7c0a3dad48cf33f886edff6b94dbb6f4

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.