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 0x2553d1339627ef2a2d2219b93d74a6f8a381c30bcac09accbc8ac8d93217059c. 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/5cdd47df-61a5-4bf4-9f67-1fd6c10dd4bc.json and https://artists.proofprofile.net/proofs/artist/5cdd47df-61a5-4bf4-9f67-1fd6c10dd4bc.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 0xef952e3a7174de0b01b634d151c28ae0e12805a5d8137e1b443bfee41f24dd6f. 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/JPES01102321.
さよならメモリー（「NARUTO -ナルト- 疾風伝」エンディングVer.）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00bf989d27e42ad0b86252d38139376bf0197d155533c4fde86da8f5e8925065. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:20:38Z), 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/JPES01202383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9062593c04950b19de4f740f71226013615c9cc3f5e243513832ed690e9754e8. 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/JPES01300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27692b3d320b7a48405ab4b8521ef3bb5405e5b306bbb6bf72383d38d26c7ba4. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/JPES01201021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608a06f12210e55039ba1aa71cf206c502adc68bb24375fa14f363f31aceca51. 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/JPES01300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f40d225cd9c8ab8df64a3428af697f331515e9e183eb8b9d003f057153d47a. 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/JPES01201123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672c69a8695656498a0513b74acc4d77e7b994ac0383ed5acc67e0c9b1622ce6. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:00:31Z), 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/JPES01300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa856603642e6aba8ea7c86fb176a63c749869c0ca4e5b60b846d2608499ba406. 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/JPES01100481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84f108a381386a15de48a70aa00978cde8d8fa10d342bfeb9b3840b530de598. 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/JPES01400273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545cc231d07aa09053e19878636981f5597e3747d4253ae55e11dbb2138c298b. 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/JPES01301401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d329498bb33025215cd1e5b90c642d3ea1799e59f985fe65e7e1883e2a31e71. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/JPU901500070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43cfa1c45ae6f30fc8909b3d9457a667a9b1c586a23a3f10bbb13c3fa3d9f1b5. 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/JPU901600399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc895e9ff8ea6fe8481aba0a69c7f8ba1e393b4ad5c96594018f637795ca6d185. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/JPES01100941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ddabefd8394da88f554a5a86fc89df7aba57da0711c1d4ce206d6b5f764faee. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T05:02:37Z), 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/JPES01202381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef952e3a7174de0b01b634d151c28ae0e12805a5d8137e1b443bfee41f24dd6f. 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/JPES01102321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe793a8fb6395ff224478f32ea295fb57281eefefc1bce4796850990692f1d1b0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/JPU901400576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f26f03a95e2c5fb6a4e771f63d114e4004f3acecdd77ea1780f86e0995105e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/JPES01301104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545cc231d07aa09053e19878636981f5597e3747d4253ae55e11dbb2138c298b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-27T13:56:53Z), 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/JPES01301401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952af5d58bf65b100c5d28b464476f3d3347756cc2f4dc4b1219e00cef0121fa. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:53:20Z), 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/JPU901601978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70d055af1cfc966ea5bd5af0ac9ca2b303c97f361f4adffd37616cb80ead858. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:31:25Z), 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/JPU901601977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b31ba42765cf8a004f1735075f1e5dbe76ebed52302d1a975858f8d51ae839b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/JPU901604104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b81db00dab7b57c55889e280e96e9572017e92296a95508f7e73e82a1951db. 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/JPU901604105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88de47a49dc37d91aa9a6c0f87da83c08b2c0dd87b1200dd0de30c0851457a77. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:50:28Z), 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/JPU901604106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9920635acb32bbf9c27aa74234e07d10fb9900946ce22ca84fd227d2ff165578. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/JPU901402557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a750e6a1e03e5b882a80d5b8e53cb5c6f532beecef7e1f7bafa6bf058145e0. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:06:19Z), 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/JPU901603222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90c3ac80d6bccde085bb6f316f0edd1293fe8b354fdf354c5c192f6f19c43a3. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:39:57Z), 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/JPU901500068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7cb5cdff4b449d09b01762cdce7041c5380c62cc68de443d26218f728eae28. 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/JPU901603224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc895e9ff8ea6fe8481aba0a69c7f8ba1e393b4ad5c96594018f637795ca6d185. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:07:27Z), 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/JPES01100941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9920635acb32bbf9c27aa74234e07d10fb9900946ce22ca84fd227d2ff165578. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/JPU901402557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6180b792f54da42637f22a32f1709b0aa1b433a0b696ab11c3eedebbe691340. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/JPU981702405.