Písmena

Recording by Karel Štědrý.

Recording identifiers

ISRC
CZA166500148
CopyrightID (CopyrightChains transaction hash)
0x8209e424fed6a07ab41cb7ef8de7ef85e02b2c00a84600ce6ea17563973c1fbf
Copyright registration time
2026-07-07T12:56:35+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-07-08T03:20:19Z
Bitcoin block
957118
Canonical record hash
sha256:bff3c887521d377aa61fd2795b4bd208703ac436f88ad01e7a09444d6d1f11cc

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.