ISRC UK4WW1350005
Verified recording
UK4WW1350005 is “4’33”” by John Cage,
registered on the CopyrightChains blockchain with CopyrightID
0x6fe5c4603cf8dd6d72b4dcf9d71a706d4d8c6beb6a0fe91ad99e72e620cfdd6a and independently timestamped
in Bitcoin block 960250 on 2026-07-30.
Verify the canonical record, hash, and Bitcoin attestation at
https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UK4WW1350005.
Recording identifiers
- ISRC
- UK4WW1350005
- Title
- 4’33”
- Artist
- John Cage
- CopyrightID (CopyrightChains transaction hash)
0x6fe5c4603cf8dd6d72b4dcf9d71a706d4d8c6beb6a0fe91ad99e72e620cfdd6a
Dual-chain proof evidence
- Bitcoin-attested timestamp
- 2026-07-30T11:13:28+00:00
- Bitcoin block
- 960250
- Canonical record hash
sha256:3ceb92c92f23f28c4c8f03d84cbae800dba4250985dbc1e1b499ed71c514e55e- Verification API (6-check server-side result)
- https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UK4WW1350005
- Bitcoin block existence check
- https://blockstream.info/api/block/960250