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 0x0a01f92bc019bc0b9cc0b12c1c682f618d4afa562a3f76b427255eb994428124. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b1cb5759-d606-4900-bf43-bb6b9194a004.json and https://artists.proofprofile.net/proofs/artist/b1cb5759-d606-4900-bf43-bb6b9194a004.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27b55c4420bf279791b6b108849356dcb4048f105e0f6facd5e728802768a94. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/JPPO01705774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdced53b2359523be1c5d21a0c2552480b9e3c3662992208c7cbf0f8617805a4e. 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/JPPO01803186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756973d0e0639b38b16fa6395b33f1882876fd17a5d53f0f3b64d0aa5b85950b. 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/JPPO02201790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de91f5af181629b4a3b54d26be160614a6a9057d635b2495c186aa74adeb01e. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:27:13Z), 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/JPPO02202521.
ゆけ。 [Matsumuro Seiya presents “LABORATORY” session6 at BIGCAT(2022.07.28) / Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd76f15abb9268634fde8b6531346582fb21b7990d038af36aae6a4e25a89c57. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPPO02402486.
ラ・タ・タ 〜すべてはフィーリング〜(feat.堂島孝平＆岸本ゆめの)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d280a76d98e81d2d78c08e627a0c84f0cee7f825d9478a8c04227007b7702fa. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/JPPO02400331.
日本テレビ系ドラマDEEP「3年C組は不倫してます。」オリジナル・サウンドトラック
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74be198508dd2c08bcd9d0f57bf61de3ed92934681b834e75daef97de19257e. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/JPPO02502342.
未来ある馬鹿者からのセイハロー
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875b6b54537f3b719645382adf7ba888fbe728dcd9aa1d18f209adb8137d9a02. 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/JPPO02502341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74be198508dd2c08bcd9d0f57bf61de3ed92934681b834e75daef97de19257e. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/JPPO02502342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c618f75e580e346f20c131110ee9c44d7f2622ae31db4cc41d9b76ccfe6f108. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/JPPO02501611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbddee930f4c5487e8f4727ff489fe8ab41a884becc6fb2fc659512f8b1c9027. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:34:21Z), 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/JPPO02502344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00fe6e9aa9d70119bf28a10d0f77e2d54dc21fe7b180c2078446ef68f5b6a5dc. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:10:49Z), 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/JPPO02500684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb7c284d4e9fc2266687a576dd1f9a27bbcd182e8a01292125cfa3f1b8ca881. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:01:42Z), 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/JPPO02502345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d05d0d3d3da242477b747d50c5cf116c8d6bb5dabd1cc0dcf516c6fbf5144dd. 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/JPPO02502346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd557a07cac9df72810fe30ed8c9c174133d6add20059a87333fb7e12ae94098e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/JPPO02502347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538d48dfeb72a21a1999f82ef4eebe2c051fa5c302c4256df79a7e0d3546d108. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/JPPO02502348.