Twice (feat. Brad Cook & Justin Vernon)

Recording identifiers

ISRC

USHM21431790

CopyrightID (CopyrightChains transaction hash)

0xc3d949b6e4458251c1d40d76180d077f54e56edfcae52328d9f6a1c8bb8b6c42

Copyright registration time

2026-07-30T23:46:10+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-31T00:26:26Z

Bitcoin block

960327

Canonical record hash

sha256:3c4c18a5462165935bc42e8f15a0342a9924a407c51493ba950853f9cd0a5d97

• 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.