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 0xddb36565c0f7ecc1a1af6980baf165530eaf5582b922b0a5975b8aea1e62d4ba. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ecc42d90-6b06-4d37-832c-69e83394f888.json and https://artists.proofprofile.net/proofs/artist/ecc42d90-6b06-4d37-832c-69e83394f888.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
A Cruel Angel's Thesis (Neon Genesis Evangelion OP) [Cover Version]
Sorairo Days (From "Tengen Toppa Gurren Lagann") [Cover Version]
Hitohira no Hanabira (Bleach ED 17) - Stereopony [Cover]
Zero Eclipse (Attack on Titan - Historia Reiss Theme Song) [Cover Version]
Atashi ga Tonari ni Iru Uchi ni (from "The Rising of the Shield Hero") [Cover Version]
The Baddest (League of Legends) [Cover Version]
Shock (From "Attack on Titan Season 4") [Cover Version]
Shout Baby (From "My Hero Academia S4") [Cover Version]
Haru wa Yuku (from "Fate/stay night Heaven's Feel III. spring song")
Kamado Tanjiro no Uta (from "Demon Slayer: Kimetsu No Yaiba")
Unlasting, LiSA (from "Sword Art Online: Alicization War of Underworld")
Kiss of Death (from Darling in the Franxx)
Homura (Kimetsu no Yaiba: The Movie: Mugen Train Original Soundtrack)
Long Shot (Re:Zero Season 2 Part 2 OP) [Cover Version]
Kaikai Kitan (Jujutsu Kaisen OP 1) [Cover Version]
Zankyou Sanka (Demon Slayer: Kimetsu no Yaiba Season 2 OP) [Cover Version]
No. 1 (My Hero Academia Season 5 OP) [Cover Version]
Naked Hero (from "Ranking of Kings") [Cover Version]
【SAKAMOTO DAYS OP】 RUN SAKAMOTO RUN - Vaundy (cover by JooHee)
【My Deer Friend Nokotan OP】 Shikairo Days (cover by JooHee)