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 0xe4cab5f2fff987b18111a0ab6be08fc5b71aa26e0c820255331ba5f0e3fbb41d. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d7debc4c-2a64-45a1-9135-7ac26646cac6.json and https://artists.proofprofile.net/proofs/artist/d7debc4c-2a64-45a1-9135-7ac26646cac6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
ゆとりのじかん 〜頬撫でるロマンチック・ギター〜
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 0x0d9488084f62d0d2212cee6f4be5dc9392d3988455343b7574ce2c6da40277f8. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/JPCO01831000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e84b6398a56b4e99ff91fa8805ebf7f287fd80635af8fa9be3d04f0886fa75. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/JPCO01218940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6798517a68c58cdb0ba6da1e7d173c125b808d573246c45e0e54fe3b301600ed. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPCO02220470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0838b6a7c07c747920305c7b6b6994fd906ae0df6d51b45507b5c47df7f9cff. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/JPCO01218970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586fc5ab15b26837993ce597d1990b9ad22c8d1f6c7261268eb66bb8ce01cbf7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPCO01634190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2280625fba131630c58ac78a6dcae935796f0938bd0a14ddc23bb9aa388b5ce6. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/JPCO02220480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6dae5aed99127c13d01873fcc748d93c381d6fb21f467d15d23df1c1e4e188. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/JPCO02220490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb971be8e499804dade4d968554176ac8ffb81ead87a32f2ce8c8ae356224cc02. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/JPCO01320030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca5f03e6f7e6ae5ca94dee00873b395c9db8f413dfced721a90acb3527b4bd6. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/JPCO01320060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5299194bb3ca5660a6b6e2799cc538b11e0537dcfc25c1b4afaf1fe05196f115. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPCO02220500.
愛のロマンス（「禁じられた遊び」より）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c3ce60b7873a2dcb3162a1ea22984785cbf8b0bddfe13da535b0084bbb488c. 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/JPCO00031650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd283a905eddb4e6eba5ef48bce263037e4e82bf33551ac5a4588b9ea8ce24eab. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/JPCO01219040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9a14a80ba1ae090cad6fbbef29790a764b78e1be7aff3ce8ef23748aa9c3a3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPCO02220530.
「黄金の刻～服部金太郎物語～」オリジナル・サウンドトラック
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf168e4f10239e33f118796cc8dd99149988b40edc624932b2109f386b7b4e3cc. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/JP92L2420060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbccdfc6210b6173bdf4c497936948303fe9b481453f12df45dd9ec9ec9262088. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/JP92L2420070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5496c1119cacaff665d4862edeb2bfd89f8fe3c8707a8c6f283a6648f97a968. 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/JP92L2420080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13260b66f204d84444caee58a0805870bc6d4560a6a44c78d027cf64f5f0b2dc. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/JP92L2420090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e70a2f0a5d7c2949476f916d90cf7c367f0f8c9d21e0798cf96d52f99c347b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JP92L2420100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ecd220782f399aadd96aa9d892c9faa66f62ac653f7407ff25ce7e1b5248918. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/JP92L2420170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20d7d6a9003a1e6c78bdf6c41fc5f5c7e30bf91c8046c49cde8d5318426a23e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JP92L2420190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89396362c379a64f53ccb523a6feb35558716597d5f7d7ebd13bb2b94822c7d3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JP92L2420240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ce06459e894603f3b53761a722831a11c905de01909032bfd6fab5d05c22fb. 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/JP92L2420250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c87e1f243c5ead6f1600e5d3c418a7a1322d632d228a60428e3ac7eade4ac4b. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/JP92L2420260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafae8bf5a5177b64649cefc4233dc238162c781582c6002a027b52172314dce2. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/JP92L2420270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359efb391b4aa902729a73c38f62124a9703113c9f21ed92e7a92118d79acbd2. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/JPCO01517550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca6d95813ad3570b4a0d773ce29a1ab04e3fd2e140b0c66f4803aa0ce908cdc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPCO01517620.