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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf27b3d52ba7b0d85fe7953533ca3a27c5a15d37580ac44d8ddc336b7126d655. 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/8a76b10d-04ed-4719-9848-c49ff3b89ee7.json and https://artists.proofprofile.net/proofs/artist/8a76b10d-04ed-4719-9848-c49ff3b89ee7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Classroom of the Elite S2: Ayanokoji vs Ryuen Fight Theme (Epic Version)
Sword Art Online Progressive: Scherzo of a Deep Night | Survive the Swordland
Most Outstanding Music: Arknights "PRELUDE TO DAWN" | Main Theme (Epic Version)
Sword Art Online Progressive: Together We Can Defeat It! | "5th Floor Boss Battle"
NieR:Automata Ver1.1a Soundtrack: Main Theme (Epic Version)
BLUE LOCK Soundtrack: Barou Theme (Epic Version)
Deku vs Lady Nagant Final Fight Theme | My Hero Academia S6 EP21 Soundtrack (Epic Version)
Hell's Paradise Soundtrack: Main Theme (Epic Version)
Demon Slayer S3 EP11 Soundtrack: Final Fight Theme (Epic Version)
Fate/strange Fake -Whispers of Dawn- Soundtrack | Main Theme (Epic Version)
Fate/strange Fake -Whispers of Dawn- Soundtrack | Main Theme - Epic Version
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3672333b592e980c12cc7e55897154d43def035b5c0cc624fe46202a664232d3. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWR2376242.
Sword Art Online Alicization: Find Your Sword In This Land | suite (Epic Version)
See you Later Eren「Attack on Titan Final Season THE FINAL CHAPTER OST」 (EPIC EMOTIONAL VERSION)
Blue Exorcist Soundtrack: Shimane Illuminati Saga | Main Theme (Epic Version)
Solo Leveling Soundtrack: Main Theme (Epic Version)
Solo Leveling Soundtrack : I’ve Gotta Get Stronger "Jinwoo vs Snake" (Epic Version)
Solo Leveling Soundtrack : I’ve Gotta Get Stronger "Jinwoo vs Snake" - Epic Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa07ec42f61ee3cb2c275395ed4481d25852c402d0734ee15197d9e9362f3c7c0. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA42421249.
Escanor vs Estarossa | Nanatsu no Taizai『ESCANOR THEME』 (Epic Version)
Sung JinWoo vs Igris | Solo Leveling EP 11 Soundtrack (Epi Version)
ARISE「Solo Leveling Episode 12 OST」JinWoo Summoned Igris (Epic Version)
Kaiju No.8 Soundtrack: Main Theme | EPIC VERSION
Haikyuu!! The Dumpster Battle Soundtrack: Main Theme (Epic Version)
Kaiju No.8「Never Break Down」| EPIC VERSION
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e89b99c4f462eaad7ea2468dad14181b1d1fd2ccd60d2fe1d7a0ce8686bc84. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPLR2482644.
DAN DA DAN Episode 7 | To A Kinder World (Most Beautiful & Emotional Music Version)
DAN DA DAN Episode 7 | To A Kinder World - Most Beautiful & Emotional Music Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd882d2ebdb317eda3da599533c2e8e73a22213ff6b37f5cd51d6a7f9cb761282. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ7M2400120.
Shidou's Big Bang Drive Theme「BLUE LOCK OST」
Chainsaw Man – The Movie: Reze Arc TRAILER MUSIC／劇場版『チェンソーマン レゼ篇』特報 (EPIC VERSION)
Chainsaw Man - The Movie: Reze Theme『チェンソーマン レゼ篇』
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce4caa231d1a2a471c74104c9eca42c2836c55b4b0d1abb1e0c5ccc51b41134. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QT3EZ2403802.
DanMachi OST: Bell Cranel - The Last Hero "Eiyuu Ganbou" (Argonaut)
DanMachi OST: Bell Cranel - Heroic Desire "Eiyuu Ganbou" (Argonaut)
Requiem of Silence | Re:Zero Soundtrack (Tragic Emotional Music)
Requiem of Silence | Re:Zero Soundtrack - Tragic Emotional Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9833aa96dd6400af557c12416d26d9f1cc4142aef26f71efb19f9a13538baaa6. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN42555941.
Sung JinWoo vs The Ant King Beru Theme「Solo Leveling Season 2 Episode 12 OST」 (EPIC VERSION)
ILLEGALS『My Hero Academia: Vigilantes OST "Main Theme"』 (EPIC VERSION)
ILLEGALS『My Hero Academia: Vigilantes OST "Main Theme"』 - EPIC VERSION
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6549dfb6d4e3b7095a9887b07fe0eb6211394bd15a12d5017c5e2013c10bb75. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMEM2555221.
Sung Jinwoo vs Thomas Andre & Hwang dong-su『HøWL』Solo Leveling Season 3 OST (EPIC VERSION)
Shin Godzilla OST: Persecution Of The Masses『シン・ゴジラ』EPIC VERSION
Demon Slayer: Infinity Castle - Complete Soundtrack『鬼滅の刃』無限城編 サウンドトラック
Akaza vs Tomioka "Demon Slayer: Infinity Castle OST”『劇場版「鬼滅の刃」無限城編 』冨岡義勇vs猗窩座
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e8342660562222cb85871014c1b1a1aa64d92d0d49ac172c09623f3c9273eb. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ7W2532435.
Zenitsu vs Kaigaku "Demon Slayer: Infinity Castle OST” 『劇場版「鬼滅の刃」無限城編 』 善逸VS獪岳
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba5e1ed7eb62bb5be2549eb89a2f7698b45557a326142e20c139f593f470618. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ7V2560385.
Giyu's Demon Slayer Mark "Demon Slayer: Infinity Castle OST”『劇場版「鬼滅の刃」無限城編 』富岡義勇
Zenitsu 7th Form "Demon Slayer: Infinity Castle OST”『劇場版「鬼滅の刃」無限城編 』善逸 7の型
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5027f22612191f4b587928fb520cc00e32670b80603d39fe985c6f79f0d78c30. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ7W2532422.
Akaza Theme "Demon Slayer: Infinity Castle OST”『劇場版「鬼滅の刃」無限城編 』猗窩座
Shinobu vs Douma "Demon Slayer: Infinity Castle OST”『劇場版「鬼滅の刃」無限城編 』胡蝶しのぶvs童磨
Awakened Tanjiro "Demon Slayer: Infinity Castle OST”『劇場版「鬼滅の刃」無限城編 』竈門炭治郎
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c7efc4f43724b693f9ee7f715235c434a7ae6686c60da00e6b9decf60dbde9. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ7W2532431.
Akaza’s Backstory "Demon Slayer: Infinity Castle OST”『劇場版「鬼滅の刃」無限城編』猗窩座の過去
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc9ac8ad5704efd2f716ee21ec0c58851b894a3df0a54cf028b3b5c11393e76. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ7W2532437.
Akaza vs Giyu & Tanjiro "Demon Slayer: Infinity Castle OST”『劇場版「鬼滅の刃」無限城編 』竈門炭治郎&冨岡義勇vs猗窩座