ISRC USHM91136978
Verified recording
USHM91136978 is “Big Duck” by Mark Lettieri,
registered on the CopyrightChains blockchain with CopyrightID
0xbb037cca5118035c4561b53d12b999786bb02e5a38bf5e63dd4351eab54cf430 and independently timestamped
in Bitcoin block 956304 on 2026-07-02.
Verify the canonical record, hash, and Bitcoin attestation at
https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM91136978.
Recording identifiers
- ISRC
- USHM91136978
- Title
- Big Duck
- Artist
- Mark Lettieri
- CopyrightID (CopyrightChains transaction hash)
0xbb037cca5118035c4561b53d12b999786bb02e5a38bf5e63dd4351eab54cf430
Dual-chain proof evidence
- Bitcoin-attested timestamp
- 2026-07-02T03:55:08+00:00
- Bitcoin block
- 956304
- Canonical record hash
sha256:de60ebd928d941c49643435c5966bf601e8eb04ee32334b4436d0bce03c3a177- Verification API (6-check server-side result)
- https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM91136978
- Bitcoin block existence check
- https://blockstream.info/api/block/956304