1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 artist was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a9a3a5560865f830f3487749c8234d68825b89ad7ee019c85de8df0e81a676. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db89db33-aafd-407a-b785-4bf304d36a5b.json and https://artists.proofprofile.net/proofs/artist/db89db33-aafd-407a-b785-4bf304d36a5b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Tsuki to Hanataba - From "Fate/Extra Last Encore "
Gurenge - From "Demon Slayer: Kimetsu no Yaiba"
Homura - From "Demon Slayer: Kimetsu no Yaiba, Mugen Train"
Ready Set Go !! - From "She Professed Herself Pupil of the Wise Man"
Ezio's Family - From "Assassin's Creed 2"
Instanbul - From "Assassin's Creed Revelations"
Venice Rooftops - From "Assassin's Creed 2"
The End of The War - From "Attack on Titan"
Call of Silence - From "Attack On Titan"
Blow My Gale - From "Umamusume: Pretty Derby"
Wanna Have a Bad Time? - From "Undertale: Megalovania"
Main Title Theme (From "Illusion of Gaia") [Piano Version]
Main Title Theme (From "Illusion of Gaia") - Piano Version
It Can't Last - From "The Last of Us Part II"
The Last Of Us Main Theme - From "The Last Of Us"