Speak!

Recording by Barrett Martin Group.

Recording identifiers

ISRC
QMBZ91704277
CopyrightID (CopyrightChains transaction hash)
0xc8715498b20d832949186a49b950ee9feb8e9cfd8d5c7e89931d72cd9f9b3d2c
Copyright registration time
2026-07-07T17:23:14+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-07-08T03:20:19Z
Bitcoin block
957118
Canonical record hash
sha256:0a6567c4bb548543577afebc94fce29e8b0e163fa07b01c98f1c558c45d552d8

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.