Kroužek

Recording identifiers

ISRC

CZA100110080

Release date of the album this recording appears on

1991

CopyrightID (CopyrightChains transaction hash)

0x2f9e1314788287bf961c988bdbf79167ee14bf415ba6d8713655138897dad56e

Copyright registration time

2026-06-08T16:14:47+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-02T03:55:08Z

Bitcoin block

956304

Canonical record hash

sha256:45830a2dbdb7f1bf33671c269750996cb8f100c3477b0a4ed7f99189964dc005

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC CZA100110080

What this proof establishes

This recording was released in 1991, 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.