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 0xc0f2889c623eb487ade6db134b933edb141dcbcd312afd368c1ef91243154b99. 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/e13378a2-fb10-4280-ad63-83153dd401c4.json and https://artists.proofprofile.net/proofs/artist/e13378a2-fb10-4280-ad63-83153dd401c4.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 0x372de392fcd4117315f70d3ecb8697f151282ca922650f808010b1b87e4dc3bd. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPPO01330445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31bfc4307a1093d5b2d3b212eeaaeb7264e4fedfe509e071c6f220b24f4de37. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/JPPO01336745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2b51fff361068a01c5ae6f92aeea752c5d20398138c6e78ac9bf399d481e64. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:24:40Z), 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/JPPO01336748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5b4b795c14d0710e308d5d35ab8c10e4a5c3a956a5112fce64ecb15700c842. 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/JPPO01336749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea05bb129ed86777e4f24964296145c4e0603cf3c13842d7f3688f4ad579a04c. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/JPPO01401414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe92420b0e89b6aba9c1d26c4cdd9cbb79f9b42fede212b3eb7deb65cd00784e0. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:26:20Z), 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/JPPO01401416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7b7750d2e450687ac3e584a754c9a032431e0a68503e35fe28676328f7718d. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:37:14Z), 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/JPPO01401417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3403b29e9da7f3c0b6c1c8b6ad7a4096459884594651aa313379411d0d4231b. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/JPPO01353409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58cb96ef246c617b77713b5ddfccfad2e7d690a1adf25867932ced5ebabb2a7a. 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/JPPO01401418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87685498bd3b3bbb508b8a413a5c6347958860cb6ba9a83835a92fd39d7d269. 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/JPPO01400238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87944db3b1c8c271c9cf3692fcdf3605028311438797a6ae23bdbd5e2c21ba9f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPPO01405447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa694d6fc84a1df2e7e4305b8a81ce32a884d71f78f38927dd44b2d1617184541. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPPO01405448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816cdb63e43d41ab51a9b63c152337fbab5bd87c40fcb1c44211ac1d0079435f. 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/JPPO01405449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0395bcfb660e16197ee498b101116a1a57ce57d0cf6297f7788499ec4a76db. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/JPPO01405451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f2320e136f95d18caba5a6c08a05ab9e69e79742c9946cfe24ee2728e5c2821. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/JPPO01405454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1b457832307527bbc2ac7d2b5945bcb36affb07ddd67205d182e0b5b72f52d. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:24:09Z), 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/JPPO01405455.
ステイ・ウィズ・ミー ～そばにいてほしい
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45f6ca17b309c0a9a750e4d301da785ba1fe98b993e136cbb2de831bd0bf48b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPPO01505279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8ea276c9b1d34664b72500a2e741c58d54bf4f0c3ff3dd55d8813bec5f8909. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/JPPO01505280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83af87f02897e719aad0e7324ec1f07e85c28cfd854deef9aa103606ad5a941. 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/JPPO01505281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cea12e23f92e0764c2d4e19c601c2fbdc0de73d7ea7d5a5090c661658fda98a. 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/JPPO01505012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d616c7ace421b990fd19e71ab81f8616a181474daf93d972c2385e1b558e15. 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/JPPO01507371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719bcf687f5b378a2c64f4187c6b9bff1a4c03c089d11006adddee6ddcee4ac4. Chain 2 (Bitcoin): anchored in block 958613 (2026-07-18T21:35:09Z), 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/JPPO01615878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a1e8d906af78441a48d45dcf8768bd240de069f4358ab98f08ed6cd4459e259. 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/JPPO01615879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11cdde0f45af0085c8c2f2d3f3c02e8559e840f90ba830117c354863e055266b. 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/JPPO01615880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae00aee58e2dc5ae9c48e9bbf3002435ac01294a46e291a004bb954d642b33f. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:05:47Z), 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/JPPO01619670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a79087a5d6c43120ad3d1458b02439dc77b55c35a0dd19232726e806cc2567. 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/JPPO01620679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24078c4a647d778ab6e288c65613c591396b1110c39c982b50dd38bdf9e956b6. 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/JPPO01620681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8ef4360148ca032daa8885e44d2221f6c397d91fe31374ac70de886ab824c7. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:45:17Z), 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/JPPO01620682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3826e24dcde74e36c2d739a77e8b6e3c02f6e52ca51752b534f85b01bb755e63. 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/JPPO01620683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26416db2f250c269ec10560b514380aea66065a21cd37d82d2a87426cd37b231. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/JPPO01620687.
こころのうた～クリス・ハート ベスト～
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25b8a9c3cd0767907e922c9f637b0f01cfe656f4fdfb17122bc7b826f273295. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/JPPO01405795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369e97428d7412bcb08cc942a1e664450fc9306678d177727146c4907c1b1e4d. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/JPPO01401415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ea963886191cb40a958f4d34243b971abd74c2ef8ee9573711aa096915e589. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPPO01336744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e4601e8d1c83714d245c9b3d8737470927ed4e236112a13e4d020b6fdc1950. Chain 2 (Bitcoin): anchored in block 957868 (2026-07-13T14:56:55Z), 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/JPPO01405450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3beda05d97efeaee1433facf3fa666722bcfae28a4706519cf8f33938a975ef5. 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/JPPO01330444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2225e2892131820a1f18eb3983c114184a9ca25bcc8e54ff9f91cf77a41aae. 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/JPPO01704988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x723c70561b4335cccfee52c267a102e98564e1bbe6d97b78f0daddcfa53427a8. 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/JPPO02001114.