Katsu may refer to: Entertainment Katsu!, manga by Mitsuru Adachi "Katsu!" (ja), a 1984 song by Shibugakitai Katsucon, an annual anime convention in Maryland Other Katsu (Zen), a shout used in East
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 0xbb27b29d6ca7af05b96c3555fb1a44637e4aa7eb3115f9a7ca41f4d267227a2b. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cc5253f6-10d6-4100-836d-0dd8c9182e86.json and https://artists.proofprofile.net/proofs/artist/cc5253f6-10d6-4100-836d-0dd8c9182e86.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x08088b77678a8e0f98f4fee498e0c5d8439b44aa4dc4ca14767e214445d66028. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/JPW561907106.
Paranoia（DJ katsu Fashionable REMIX）(feat.花たん)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7c569783a4662a81529b43a1df388d621ac1a44c3a7ddce7a1567f862c09ff. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:49:16Z), 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/JPW561907107.
Paranoia（COOL&CREATE Remix）(feat. COOL&CREATE / まろん feat.ビートまりお)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18d6d2f673869417e4819b1a42760fab042e60d7acd6355541f1bad1238c171. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPW561907108.
Paranoia（SBver2 Remix）(feat. 森羅万象 / あやぽんず＊&あよ)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9406cb64585ef97b30fef36fc695ef5e6b60e14748d53f6494c793577bf07ea7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPW561907109.
Paranoia（KANAMO REMIX）(feat. 幽閉サテライト / Yuzurisa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a543f457c15c72cd73fdf13ee96b6026c66173375fd9959dfe796732e8b81d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPW561907110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e7685e2c9338845af14d1a6a16d80daec763339251594dfa03ec85d72b21d4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPW561907111.
Paranoia（TOS Remix）(feat. 魂音泉 / 空音 feat. ｙｔｒ, 抹)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b70c85861af6c64e73108a3bdf9b40f785bffee3e24f28af2e0fa73bc943c0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPW561907114.
Paranoia（ALR REMIX）(feat. Alstroemeria Records / 空音)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f7cc46bd0344292f5b7dd7fa5673712ddca65a5a2c7f59e1bc222febcc8207. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPW561907115.
Paranoia（DiGiTAL WiNG 2019 LIVE REMIX）(with.空音)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1320cb2b0e98d9400e718148b3cb6071c87a2d419af9ef71de807890c019f211. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/JPW561907116.
ZUN令和（超 東方LIVEステージ 2019 Ver.）(feat.空音&katsu&神主)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95bab0ceec3705bff6ad83257750774ca314ae18862fb2318b54e28e9d4e07a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPW561907118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14762a57a621a8308d5107233bc8d0230225da97c90ba973fcb86bbbae8d8a8d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPW561804043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389523ff00685283a863ef9f5d627094902c17a5cd43aa8b2ef5e9a724d82444. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPW561804052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad2ad85e1e61173c6cb3a61cf8124000c5930ee1b9357a0972d336b6d06bc8c7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPW561804111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6521465b116486ff3865a21d25e7ee814f1c6a02a8ead3e361db13110da592be. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPW561804112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d5bcb2ded5a7d6652d2b88b13d513f33d9ad53b27e53df226a8b37cd25a0fb. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPW561804072.
Three Magic(DiGiTAL WiNG TRANCE Version)(BEST OF Non-Stop Ver.)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f9d8a9da422f0ed3fb2a3fc5be4b0a63afb0dd3c2923dba6c8d077796266f0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPW561804079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2213b8e391ea5990cedb4711d86d2b5c0a336af26b532502f936c3f43a291168. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPW561804020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7311857f451b3dd4792461180ec5fc998a6341f2998cefbb36979668cfa4f96. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/JPW561804136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc5b8393125310dc607cbd146db84e60da046c9fa03b4af5738ba69af097705. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPW561804141.
物凄い回しちゃう鍵山さんが物凄いうた
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9b81c2ba4c6f6ff5fa87500891ef2e40086a1b2df25a4c9d6fb8a4d8f801a6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPW561804099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f485c82f79f32a088b9619e1a7911b9996b6735a7de4d6f2a973af7af97677e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPW561804103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc76f7b0fec50dabd8b10390a8b1364845aea90b988a5b739b45961626f5fac0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPW561804118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6ebdfdbc367396a1278a3082822073475d1c497696d59fb5f5a98f123c1541. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPW561804151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c4fb5e583650478385230f4db280660664bc63a3cad043ba3c853d9c59d312. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPW561804223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x388aa89de670d063708b435b4259d9a143c3f687b4f03c2739dba4cc5e85c492. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPW561804229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54840037b1c82f071ebef0f7294422c84c468cc424717f373738ab84340c5ce7. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:11:19Z), 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/JPW561804003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2622a94203916e6c0aa32abd7a9acac8646320d63191e8cb8a5fb6c44d70f20. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPW562110732.
Asterist(Tsukasa feat. ふうか[D THE ARCADE TRACK])
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56144c5101e27dc8e9a0aa451ab4964823297d31b3f3840f8c400868e81d2dfe. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/JPW562110739.
PARAMETERS(Tsukasa feat. 沙[D THE ARCADE TRACK])
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d36dd2598bbb41ac498f1af422ef2b905aefb3300c69333f4b21d4c7b1e465. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/JPW562110740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033a0efe17e1a1d60be63f6dc57afad4083a134ec4ba9358dad02f942d635529. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPW562103038.
Virtuous suicide 2019(DJ Command feat. 空音)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd569c219bb5b08001a93fc3b7c52d09b7c0cf164ef4e495aaeb0840b436c81e0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPW562103042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0ead3fd3bb68e4745ccf9125bc98781db3771234ee4a410aa77f5b7f2c6761. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPW561804407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24302246fac9dad759485813d9d94937179e8ab4e97a60d6b9b7f06d485f350d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPW561804413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e994126f0f98fce5ef3fa7ef68a5079e1af799b822a0ac17d07be2d19739418. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPW561804258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130515556c6fa576f429381f1b57cec3e7fecede186ab677fa4140fb876e50e2. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/JPW561804373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826445d2a7e7b4e8ac5a5ba320667e812d2728b4d59ac4186b94770971209826. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPW561804387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019f2c9e9cc34479c602dc45cb36435a9d5a6818ed521446609f61750b14d150. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPW561804155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8d5f51bd0c2bb4ae148e7d7f5ad195a1a9a69a6b21d45e9fd7000c78724273. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPW561804276.
Flapping note - Halo My Name Is Sorane -