The Contest

Recording by Stephen Sondheim.

Recording identifiers

ISRC
USBC10507519
CopyrightID (CopyrightChains transaction hash)
0x579b31bad6c8c8d22c4a585afb4f420686663d9672ae354bce21773e1de533f9
Copyright registration time
2026-06-09T07:51:29+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-06-13T15:41:10Z
Bitcoin block
953528
Canonical record hash
sha256:9bbe739274bc163182499f365d0cd308dc3166ce4856b1b0202a81464dda58e9

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.