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 0x6e43e4b14eeba0a33719ab8a3c44698e6c9b4bb36e17c25f7fc9b6e97dda87c3. 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/cba0fdc1-47c0-42c4-bad3-889c1e5a5a8c.json and https://artists.proofprofile.net/proofs/artist/cba0fdc1-47c0-42c4-bad3-889c1e5a5a8c.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 0x5bcc31f86c729ef44b1b03ca6f8be6f83a062ef9a7b453f3a4e0bb5d6c592421. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/JPCO01827270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a23ecdf135b8b04f7cc0f6d327e54822762dd69352768527d289d5c686f5db1. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/JPCO01908540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7750cb4abcb7ba09f09fa2e712feb9c4afa49cedfeeac3b05970685ed80e1f50. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/JPCO01733580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d8230004bf1d3fdc115c5ec99ed6242d170b6b1712fe88d76b90495425d5e9f. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/JPCO01908590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ce1129bbae75efe99da505f7191d3299a1dbddc9ff24c17b18e9eb917fa18b. 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/JPCO01811970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e283f8dcaff996193022c1997c107747df0392872776703b7ff39c80b9a8b0. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/JPCO01733590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9d2540790c9fa9b7aa5b5c93a1e17416fd4d8d4bdca07399a864b118a81ae0. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/JPCO01827280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364f5e72fd2fbf354d0fddb10587016ec27e7721f7cdbc67227d5034753a3b78. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/JPZ922002098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364f5e72fd2fbf354d0fddb10587016ec27e7721f7cdbc67227d5034753a3b78. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/JPZ922002098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d1918faa25fe85931098833fdd5f02f1c984a6abec4da04a36d91848d05b18. 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/JPZ922002224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c26f3b07a5c2e793d9e403e57d0c5cde0aa5116c5aaa7ebdbe960ec5c2b7df2. 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/JPCO02028210.
MADKIDが聴きたいテーマ別楽曲セレクション
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2746cdf9e8fb83669466b2bd5c53adf2627fc4536f09bc584947be7d6fc52862. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/JPCO02112370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x724694e4798c85a0abe9034c1d0602e628ee78091f5edff40a855981a7eff03e. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/JPCO02205140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2152bc803205948db7ea94f4e65a7fd28f298111e979b017e2caa182ce839969. 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/JPCO02216290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2152bc803205948db7ea94f4e65a7fd28f298111e979b017e2caa182ce839969. 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/JPCO02216290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf041b00799147dadd49c6c52accef3332ae5af59668ad6dc09bc80cc663df0. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/JPCO02205180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25bbae4ac1bd7cb8de6300e89221752f8fd6c3b3aab5a9b6efe2cc7c9e85fd57. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/JPCO02216330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25551aa07893189bf6b1e079689ccb4a78562c2b240121363c9c085a58b158d. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/JPCO02218340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1946c6f37c1db7e43909e765e700d605a303015bf11014647a40fa42c67c868. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/JPCO02218350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a1ca3ddab9d7c6c743f5e2963c911a2c12eb88ac7ac08d5726bb2d3bd3611a. 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/JPCO02325460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4c4b385682748c2f9ac2bd7f3e17eb216f56e60cdf45b2097a218747e403e9. 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/JPCO02334110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd704805993283af3d0f3ce876c1d36542f74843c095aa4803d2089717bde66f4. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/JPCO02405700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1946c6f37c1db7e43909e765e700d605a303015bf11014647a40fa42c67c868. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/JPCO02218350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4fb4427a2998f9092b85b02361e3e1a0139bc3ca2d04054b84623fa082ce52. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/JPCO02430650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac363342b207c56b2863fff3db52d5fbf47fbaca13d78b0aab7f3d923550514a. 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/JPCO02430670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd704805993283af3d0f3ce876c1d36542f74843c095aa4803d2089717bde66f4. 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/JPCO02405700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a7715d9e2721b3a3ffcd4c5d29a01ded921fa056b9ae66050c5622201684a6. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/JPCO02322800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafae2a9ea7a446b689dbfc251af8a81fcdd41399b2ede3980e264cb652d0c4cc. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/JPCO02430690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6718120abf6deee89502334f9d2c3f1409faa4d25752fe18a0a1986e567a3d. 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/JPCO02510370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01f8ee6851cd8c9676fec9a51f807db55d8d7bbefcedccdc0a062600b22f43e. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/JPCO02510410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32518335d1ec431cbe67ef46dcec50e4f4d50a01682d2ddf22d4673d8f5c28b. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/JPCO02510380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4968be472bf8233b8f63c47f955a9bbd3ce6dd9544a9d16f9034cfef90f8604a. 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/JPCO02516060.