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 0x53a865719e9f18e3c28e4f892b64f2904ebeb350a106e017ce1ef2d15cf61d1a. 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/4cd8e89e-c9e2-4d0f-a934-540342d2a94b.json and https://artists.proofprofile.net/proofs/artist/4cd8e89e-c9e2-4d0f-a934-540342d2a94b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Kaikai Kitan (Jujutsu Kaisen OP) Piano Arrangement
Kaikai Kitan ( From "Jujutsu Kaisen") [Piano 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 0x6d8264102ac92ba8e2fec284f4ee1d31311c39ee95ada9fc6467afba96953782. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZGWX2051191.
Homura (From "Demon Slayer Movie: Infinity Train") [Piano]
Gurenge (From "Demon Slayer Opening") [Piano]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e16286a1cd12fec888cab10c5e4b75ded9b75afb69aac53eb39bf067b4da5d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZGWX2061714.
Kamado Tanjiro No Uta (From "Demon Slayer: Kimetsu no Yaiba" Piano)
Touch Off (From "Yakusoku no Neverland OP" Piano)
Shoukei to Shikabane no Michi (From "Attack on Titan Season 3 Part 2 OP")
Memento (From "Re: Zero Season 2 ED") [Piano]
My War (From "Attack on Titan Final Season OP") [Piano]
Diamond no Jundo (From "Oregairu Season 3 ED") [Piano]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e4fe9514ebd6cdf168887d83c60c1307f6d3ed85d602ac2b5c68ca47e18af4. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZGWX2069342.
VIVID VICE (From "Jujutsu Kaisen" OP 2) [Piano]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f182b907a5486ad16d1f3863e5ba153244c9ffb14ab70bb16f852b46990cdd. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZGWX2110579.
Ashes on The Fire (From "Attack on Titan The Final Season" Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49cacb37b4d350e769dbef581e7973124d6f23e4f15934b033ad523f84cd237a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZGWX2118083.
Identity (From "The Promised Neverland Season 2") Piano
No.1 (From "My Hero Academia Season 5") [Instrumental]
Kiss of Death (From "Darling in the FranXX") [Piano Version]
Kiss of Death (From "Darling in the FranXX") - Piano Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb544a80737914e5ac83d21df5a5aad30a77254a91efb9d6329851748e68529c6. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZGWX2194319.
Cry Baby (From "Tokyo Revengers") [Piano Cover]
My War (From "Attack on Titan Final Season") [Piano Version]
Easy Love (From "Ijiranaide, Nagatoro-san") [Piano Version]
Daddy Daddy Do (From "Kaguya sama Love is War") [Piano Version]
Kaibutsu (From "Beastars Season 2") [Piano Version]
Kaibutsu (From "Beastars Season 2") [Piano Version] - Kaibutsu (From "Beastars Season 2") [Piano Version]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4463daf5471df1d70d55d0a1ada06470d264770559a4f8c6f31b3700f6912e. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZPJ32105543.
Cinderella (From "Komi Can't Communicate") [Piano Version]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33df5ffafd3875023968963298ec4eab146093d7301494eedcb97b9b016100a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZPJ32118481.
EVERBLUE (From "Blue Period") [Piano Version]
Kyoukaisen (From "86 Eighty-Six Season 2") [Piano Version]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa231a0f468879ba3c3c63ae14d31a6631b81ec81fb7f0f4888bc44241f95444e. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZPJ32118486.
takt (From "Takt Op Destiny") [Piano Version]
Akeboshi (From "Demon Slayer") [Piano Version]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe457d54ac30cc7e05c3dd418f8465161d2cbf4636a034325ab9f3a67885c35b2. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZPJ32126641.
Zankyou Sanka (From "Demon Slayer") [Piano Version]
Zankyou Sanka (From "Demon Slayer") - Piano Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e46c2280ecac7a32458a11c377b6ead5c64793a20df83e3f3685b5ab03a840. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/QZPJ32132426.
The Rumbling (From "Attack on Titan") [Piano Version]
Akuma no Ko (From "Attack on Titan") [Piano Version]
GIRI GIRI (From "Kaguya-sama: Love is War Season 3")
Dance In The Game (From "Classroom of the Elite")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f6916ed7aa95dd77e3fcb1f0b4ee79625187f9942e8eaafe8f9ab6f08f5148. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZPJ32185109.
Overlord of the Thunderstorm (From "Genshin Impact")
Tales From the Snow Mountain (From "Genshin Impact")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2fa55f6f85a3e5b966f0224472a6eff43d5c7ddfd6e309182885e9f4c2c7042. 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/QZPJ32199394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabdedf6e515412f4b72a9309119854bd0f959ea5abbb4da6ed0fdb3e5b2bec24. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZPJ32218704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d8c8a5713b7608db7d7c09435649887aed782c0d88a0ce7d9080e9fccc5dfa1. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZPJ32225404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69da98c437b785cad7de0e12b78db6ee29201e82b90500475c8f62c509f30247. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QZPJ32265397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff84951b3213f8e1ef29f773b6984208d2334c095c47ab51a4f4f7ea725729bb. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZPJ32281890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1cc9cab37224dfffc8d3b3c24b984641a9924927b63d3cd23556412d2a49fb. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZPJ32286819.
Lamentation Et Triomphe (From "Genshin Impact")
All The World's a Stage (From "Genshin Impact") [Piano Arrangement]
The Road Not Taken (From "Genshin Impact") [Piano Arrangement]
Shikairo Days (From "My Deer Friend Nokotan")
Natlan (From "Genshin Impact") [Piano Arrangement]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90d1d62740d1e1ebbabebd6510884b24d3c656a2bd891ca9191bf9782249abf. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/QZPJ32418251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076ac0a4919708b6c8a9dccf84d4f5d22e24d723b9d19e682594dddd60ca66d1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZPJ32426247.
Kaijuu (From "Orb: On the Movements of the Earth")
Kaiju (From "Orb: On the Movements of the Earth") [Full Version]
百花繚乱 - Hyakka Ryouran (From "The Apothecary Diaries")
Lumière (From "Clair Obscur: Expedition 33")
Alicia (From "Clair Obscur: Expedition 33")
Luffy's Fierce Attack (From "ONE PIECE")
The Very Very Very Strongest (From "ONE PIECE")
Dark Dream (From "Lord of Mysteries") Piano
Shine in the Cruel Night - 残酷な夜に輝け (From "Demon Slayer") Piano
Demon Slayer Corps - 鬼殺隊 (From "Demon Slayer") Piano
Akaza's Theme - 猗窩座の過去 (From "Demon Slayer") Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b644150d5da6fc7ab5b281bbaa6bb789920fed21bce0f6a08b66bab61d6d7b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZZ7X2589099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93c058eedb5cd99e86b29431cb3ac073ae883ce72bc3c3d6f50a75de648ab11. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QT3F52535153.
Polaris - ポラリス (From "My Hero Academia") Piano
Entrance to Infinity Castle (From "Demon Slayer") Piano