Pro et contra: II. —

Recording by Sofia Gubaidulina.

Recording identifiers

ISRC
DEB209116402
CopyrightID (CopyrightChains transaction hash)
0xf417b4cd4727c3a7018db9c2444af4165e85004d73de62b96742de68b706e39b
Copyright registration time
2026-07-07T12:53:56+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-07-08T03:20:19Z
Bitcoin block
957118
Canonical record hash
sha256:89c19c8c4f36437ddcf7dde7a583f50d8aa805214158eaae88ae3dcace0f0726

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.