Polka frå Krødsherad, i Form Etter Sven E. Nordalen

Recording identifiers

ISRC

NOFCA8402040

Release date of the album this recording appears on

1984-01-06

CopyrightID (CopyrightChains transaction hash)

0xb77e14f8e619c0e8feca76ed12e825ee5e57b11285d567038b45ed73ad4ca0ea

Copyright registration time

2026-07-31T04:57:33+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-31T05:17:02Z

Bitcoin block

960348

Canonical record hash

sha256:ce3bd2274976eaaaa668301501ee877413ec0d93f68690731ba1ef367b90a014

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC NOFCA8402040

What this proof establishes

This recording was released in 1984, before generative AI. ProofProfile's catalogue derives from the pre-2022 AcousticBrainz and MusicBrainz source corpus, and 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.