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 0x1b7037eef2223c033de465226a1f12f3574f2cdb16abbb1c055d1d339935b0eb. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f7d1d1f1-1c1a-48e3-94a6-39c195bfe095.json and https://artists.proofprofile.net/proofs/artist/f7d1d1f1-1c1a-48e3-94a6-39c195bfe095.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Legend of Zelda: Skyward Sword Covers
Mario Kart: Double Dash!! (Marimba Covers)
Animal Crossing: New Horizons (Marimba Covers)
Star Fox 64 / Lylat Wars (Marimba Covers)
Sonic the Hedgehog Collection (Marimba Covers)
Monkey Island Collection (Marimba Covers)
Demon Slayer: Kimetsu no Yaiba Collection (Marimba Covers)
Paper Mario: The Origami King (Marimba Covers, Vol. 1)
Paper Mario: The Origami King (Marimba Covers, Vol. 2)
Peaches (From "The Super Mario Bros. Movie") (Marimba Cover)
Main Theme (From "The Legend of Zelda: Tears of the Kingdom") (Marimba Cover)
The Legend of Zelda: Breath of the Wild, Vol. 1 (Marimba Covers)
The Legend of Zelda: Breath of the Wild, Vol. 2 (Marimba Covers)
Super Mario Bros. Wonder Themes (Marimba Covers)
Baldurs Gate 3 - Main Theme (Marimba Cover)
Unravel (From "Tokyo Ghoul") (Marimba Cover)
Rust (From "Violet Evergarden") (Marimba Cover)
Super Mario RPG: Legend of the Seven Stars (Marimba Covers)
Command & Conquer Collection (Marimba Covers)
Level Complete (From "The Super Mario Bros. Movie) [Marimba Cover]
A Cup of Liber-Tea (From "Helldivers 2") [Marimba Cover]
Super Earth Anthem (From "Helldivers 2") [Marimba Cover]
Il Vento D'oro (Giorno's Theme) [Marimba Cover]
Resident Evil Collection (Marimba Covers)
Ori and the Blind Forest (Marimba Covers)