Marshall Hamburger (born 1 June 2005) is an Australian singer, songwriter and pianist who won the tenth season of Australian Idol in 2025. He officially won the title in April 2025, taking home the $1
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7670b1d6b540ed58ee6d626124a3d56402dcfb2f2e722462589d617677995f. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6357e613-180b-4f0e-840b-8c8f3f84ef2f.json and https://artists.proofprofile.net/proofs/artist/6357e613-180b-4f0e-840b-8c8f3f84ef2f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Every Little Thing She Does Is Magic (Australian Idol Performance)
Hip To Be Square (Australian Idol Performance)
Bennie And The Jets (Australian Idol Performance)
The Heat Is On (Australian Idol Performance)
As The Days Go By (Australian Idol Performance)
Beautiful Things (Australian Idol Performance)
Higher Love (Australian Idol Performance)