Nejsi Sám, Kdo Doufá

Recording identifiers

ISRC

CZA166900167

CopyrightID (CopyrightChains transaction hash)

0xf2b71e82d79720a74ca1c0ed2187563cca56b020a0d3bcf2224b4e2b8f8e1f09

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-30T09:57:33Z

Bitcoin block

960240

Canonical record hash

sha256:a155699fdb9a4bfb661318b85326ca0227069cb43688320f708e9ee314d92afe

• 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.