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 0xe110ba31aab487de652f9c161e81dcd15759a7ea4f6d48b859d8ff2c0da424af. 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/036d71f9-aedd-4237-81cf-35027d717488.json and https://artists.proofprofile.net/proofs/artist/036d71f9-aedd-4237-81cf-35027d717488.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 0x821dcb53e2040ef1906f42176df345342aa5b77e461fa4760edf5cd41615374a. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/JPVI02100313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbff9511433ee041bcabba918388ff588f313c8a3893019a86b385c202dda57d. 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/JPVI02002678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca5c68e248d3362e8946f1bf20c96761aed6901751d9b84562900d52faed105. 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/JPT201300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd78ab04a0dda5e0d51d25942ecef47336a675937663254a06fbecfe77e6617. 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/JPCR01702580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f4021a3d84d43f6211491731b930f8c9ae9ea7a439e1640476c3102e2b378a. 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/JPCR01510150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4415e1a0b4bb45792e505d755c56c804bdfab312c226ac862a342173bb4be31c. 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/JPCR01705300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c61382d093e64278acbd0c212714ed24a611c1e2fd230354b9ea3d2b30c70a2. 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/JPCR01510140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0815acbae8316f1b967d59a66d91c376f0f5bb11762f7cf179ff84bc266de2eb. 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/JPCR01408630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293a668a66b6ae49f7801624decca8bb1cf2a12a472035bb3c9d6eb54ee73ca9. 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/JPCR01701070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bee5513faaebc95005a7e997af5ed1d86c1bacc1635dbaf9ff337fd46b3c7e0. 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/JPCR01701080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8fc847eb4cd4ac01b0e87807cc2598228b72046039b9695f4e9314f04803e2. 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/JPCR01701020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943a127ea2bca92236e956f7474483967ada29557c0b12a0508037e0d86cc38e. 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/JPCR01701030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc11fc06a8548a0c2b26041002fd94e52de14ccd966968f39b462d7399647ed0. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:06:01Z), 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/JPCR01701040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44df2be22af96423b7380354129e15e21516d04c3b13bc7cbd5548f7ea81460. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:47:12Z), 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/JPCR01701050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50193bbc9fd7d5e14ef8543c345fa04d0a5d0c2577c41b646e4c1f10b03a0c4. 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/JPCR01701060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293a668a66b6ae49f7801624decca8bb1cf2a12a472035bb3c9d6eb54ee73ca9. 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/JPCR01701070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bee5513faaebc95005a7e997af5ed1d86c1bacc1635dbaf9ff337fd46b3c7e0. 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/JPCR01701080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f2e728ca608c2e130cf5b886824781d9a25dff6463a844f33d9ad5c90874011. 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/JPCR01701090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa12b6e0aea0519e36c0da088d069d204a8a3a24958fffaa6d9c2df06067b12cc. 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/JPCR01701110.
ものがたりは今日はじまるの feat.サンボマスター
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca2faab21f0de01df7d686a8a745cc94757f6a1894edf48b1d52033f4b562b3. 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/JPCR01603640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2eb8c249f44510f3be66f6a77d1f139543d35fa183c35f38df5b6a588473a68. 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/JPCR01603650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccdb7616ed0b8faf8436571c804c208a531d37d74fbf4f42ffaf17ae7afb57b0. 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/JPCR01603660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70966e48a1bfcd15e611906c8b551f8c2566e5063fb268d3ae61e0edfee3d23e. 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/JPCR01603670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eabeb289fb3e4e808105c216d9c759a0de59fe4c8ddedcd856a7e8f497eba80. 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/JPCR01603700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9efeb93fb35d2d8c6dd1f8cc1da3f761bc978b29ee11fe13bfba4f530387858b. 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/JPCR01510170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74083289b96d0ad560581046b41fea726607e296adfecaf0d16bee0eed7f2e25. 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/JPCR01510120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f4021a3d84d43f6211491731b930f8c9ae9ea7a439e1640476c3102e2b378a. 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/JPCR01510150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb104351c2fce21cea24103520e5c18bbb35bfee678a9e5d83eb4807a5c0cb154. 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/JPCR01408590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca5c68e248d3362e8946f1bf20c96761aed6901751d9b84562900d52faed105. 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/JPT201300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd0513f1ee031c11da1cc936237c94401b0f81485fc7afd798291c638a8f2da. 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/JPCR01408600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x634cd27ad58cbff53b1f761334bc5cf574525272159dd4a62d46a4371c035636. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/JPCR01408610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124fc67f51ec25e77bcc256fff26084fb9f02ba51d33d2512a39ec4e684bec02. 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/JPCR01408620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf60bffe5a8f3d083589cde2e950eaf0cad567c07017085f3b5001817aa81c96a. 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/JPCR01408640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65017ce79ba8022599b0fcd7f86947909765dd991156f87d96cb5432bcb333a3. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/JPCR01408650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306a18059d55fe71b056fb65b21f34ad4c81ebeb14d05cd790c76f3a809f9f97. 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/JPCR01506280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5578ed9a45f0c4a78c7ba29d11db377b0a9c62196ab9084ce97b125b03fa8ab. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/JPCR01400750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1252f4d81e966ec7aaff3dae7fcbc472b2760a3c0b26cddc3c7fa4b8e0b4b88. 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/JPU902205131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51393d9f68297868df10d7d30d1050c6c31e81afd46be9949ee7b86310483486. 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/JPU902205130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc376e7cbc5a5ddbcc752f3959e63bff370a8b7bca47d403016a0e0a7c2be924a. 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/JPU901900830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d3dd034e2f85d46d3ed56b8211f6b514f5c833988c125dd462537674633fae. 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/JPT591710061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5385b7a4b9c374f71505beb513ddd5c50275aaacbcf75e866aca74f53624fd31. 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/JPT591810053.