The Pirates of Penzance or The Slave of Duty: Overture

Recording identifiers

ISRC

GBF076840101

Release date of the album this recording appears on

1968-01-01

CopyrightID (CopyrightChains transaction hash)

0xc632d8d1e5d5aae9849e7c09d998f214525f7549e23cd31d9a11ad1944ac908f

Copyright registration time

2026-06-11T12:18:35+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-06-13T13:32:09Z

Bitcoin block

953520

Canonical record hash

sha256:0df14164c710909ddbc4d671f3f210acb8e93e0da24b19812e7dfa6bca3d08b5

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC GBF076840101

What this proof establishes

This recording was released in 1968, before generative AI. ProofProfile's catalogue derives from the pre-2022 AcousticBrainz and MusicBrainz source corpus, and 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.