Sången om Warszawa

Recording identifiers

ISRC

SEUM70601338

CopyrightID (CopyrightChains transaction hash)

0xe1399db13c6dd1197d29e17bb5f8d17f07fc2193899150151c93eda2bd4f0c25

Copyright registration time

2026-07-06T09:41:21+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-07T14:41:13Z

Bitcoin block

957050

Canonical record hash

sha256:ad4da79faf873aca7a669306a9acdd219066cdced6cce3549829894b294940ac

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result

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.