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 0x9d39cafcdbf2dcf31c2750605fdaa6a4b632e738df162be103ea80163787da6a. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b01db760-53ab-4f27-a899-2aea018f75d4.json and https://artists.proofprofile.net/proofs/artist/b01db760-53ab-4f27-a899-2aea018f75d4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Zenitsu Theme (From ''Demon Slayer'') [Instrumental]
Homura (From ''Demon Slayer: Mugen Train'') [Orchestral Version]
Gojo Satoru Hollow Purple Theme (from ''Jujutsu Kaisen'')
Arachnoverture (from ''Spider-Man: No Way Home'')
The Fall of Marley V2 (From ''Attack on Titan Season 4'')
Isabella's Lullaby (from ''The Promised Neverland'')
Beast Titan Scream (From ''Attack on Titan Season 4'')
Gabi Saves Kaya Theme (From ''Attack on Titan Season 4'')
Ashes on The Fire V2 (From ''Attack on Titan Season 4'')
Muzan vs Hashira Theme (From "Demon Slayer")
Ubuyashiki Theme (From ''Demon Slayer'')
Sung Jin-Woo vs The Ant King Theme (From ''Solo Leveling'')
Before Lights Out (From ''Attack on Titan'')