Smutny psani (A Letter Edged In Black)

Recording identifiers

ISRC

CZA120209010

CopyrightID (CopyrightChains transaction hash)

0x5af16a669ab607760618b6c81a15d432b7975dbfe1dbc064e7a0b78e35ed78fb

Copyright registration time

2026-07-06T10:06:25+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-07T14:50:41Z

Bitcoin block

957052

Canonical record hash

sha256:eebe4dc7294eaac25e15175fceb447c7a3595aee530d424f0afc11663bdf8e40

• 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.