Summer '68

Recording by Polo Hofer.

Recording identifiers

ISRC
CH0800374414
CopyrightID (CopyrightChains transaction hash)
0x063f785ebd49c1e0e86bd36a44c3e5ef5ef99e04cab76e0478bf3c8895c5e530
Copyright registration time
2026-07-07T00:57:58+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-07-08T03:20:19Z
Bitcoin block
957118
Canonical record hash
sha256:36a33042d3c750be9c4ea9faf31b8fc21313b4ce3349ab08fa2668627585d699

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.