Kupfer

Recording by Jonathan Kaspar.

Recording identifiers

ISRC
DEU672200104
CopyrightID (CopyrightChains transaction hash)
0xdfee7ee69977640cab0384095d3eded87a77ee003f74f49a57a00873eb35f10d
Copyright registration time
2026-07-07T05:52:44+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-07-08T03:20:19Z
Bitcoin block
957118
Canonical record hash
sha256:e1666100bb6c8c5ad24cbb52d6d8fc11a31708ba91169f6747cdf718541f5804

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.