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 0xad8a96874fdb522101a16bde80a8691e58b93a43ecd9517692afcb1e48f7c153. 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/3a2aa609-9d6f-47fc-a785-b778ccf59bc5.json and https://artists.proofprofile.net/proofs/artist/3a2aa609-9d6f-47fc-a785-b778ccf59bc5.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 0x4dc1fd07ab6238b8b35cfdc42309f09feeecbd85b42299bfc07df12342a6e6e9. 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/JP92N2422040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0df3a9241f430b98246bad3d6dc7a740e807967308c67522b6d36d2b05738c. 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/JP92N2422041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19921f86bccf7697e846831b8f25a50aeadfaeed69fe0e9da9bc714ea5d753cf. 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/JP92N2422042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bcfa44ab20ab77658c2b1c4fea8672cfd5f41b9b420bf289032f7748a9786e6. 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/JP92N2422043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947b8a633945c1d597900311b879c59cf48e82bfdeadb42c9db1295484f3079b. 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/JP92N2422044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20c382ea897ebbff79c2a34f46d2b868b286789a22f768b72fd4070c9a93500. 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/JP92N2422045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4495677c8939323176887a353d3f77f77b56773029c59fb998e7729b77f5b237. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/JPPI02302420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda227c1d0ecc90df17bc0f4ca53a6ce9761c0d3b0123e732f66f92f3a952cb1. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:20:15Z), 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/JPPI02302430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0b832b7d57d838326b13f20b80b82e521782e9b9391440fb4281286d902df9. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/JPPI02302440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa350caf950fc34fd89da16768d4f7286b59d420edbe9bd10aa15a7f6c3c2663b. 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/JPPI02302450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870378a19320869d9bb7c4cc729bc33f59b81d2533bf1c81e26d0c7f24226764. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:18:59Z), 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/JPPI02302460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0f26c1e321ea72512befe99ea95a164b0083ec8a01a41349db27b6b5e152e2. 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/JPPI02302470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371c5ead65f2b735bfb05d5b043d6d4c522cacf82ed0dc28340988bbe26b9f71. 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/JPPI02302480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1cc5601d7b68c2b04c48f517da95a6c35799bb9fe0aafd91b6c76868d36fa7. 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/JPVI02201268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39513e7d3719b4b100bcbc86834eb2ce456b674aa88bbafdc2893f9781aca96c. 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/JPVI02201319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71136660a688098aa3475c169142b1b0fca2d2c36c7ed99318d6373e6d2640b2. 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/JPVI02201323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116afc638e59ec867f68b8cfc0c9b8e514840a09e6f5a56eab4568d17cab0c7d. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T18:04:42Z), 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/JPVI02201324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8093102cff5296862719c05a6c0d0fb0e93b669ce2b3d13e8403e551db420dc8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/JPVI02201325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f4ac6c339b82b715d90cd5ea27d743b148c1a35b85b3f897ec450609323dc2. 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/JPTK01704590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e195d7118a73e66db1844d48ca3ac8c57c38087f8e73ef7fb983fa66bde566b. 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/JPPI01501060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a88f06d0bd9ab4f28136de235b0e00fa7290333800496e4ca25eed6f41bd9f1. 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/JPVI01539480.
しんでしまうとはなさけない！ with クプラ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c05116dbb4ada34697b6463d24bbfe6c9fe3efbbcf8f3ceb4d0a73dd2951fb6. 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/JPVI01540100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5c23cd48824ff3afadb666569a60677e891fac3af6f5c975e3890a8b489578. 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/JPVI01539500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x885853e91a464c1ee4d22b1eb45ea626cd12117d0c8be2fb8011fac7557d6802. 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/JPVI01539510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe898d825c7633b311aea5ae6ba066215233acdf51d3757c3577d58d047de833. 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/JPVI01539490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b2c6e5eab2c407980355f783b3f4bbbdbe99f5a2c3c98c7007909127369a2d. 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/JPVI01540130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850f09427378b6838e000b3c0548e6df493eca4bb86754dbfcea75676f91b0ea. 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/JPVI01539470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1cc5601d7b68c2b04c48f517da95a6c35799bb9fe0aafd91b6c76868d36fa7. 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/JPVI02201268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681336124f663f3497a174996e22e07e11592a6735c479037cc4760e6a54db1b. 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/JPV752002639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b961ad659ddefc77fe1db4b841dc680efb96b226ce5dede55f12cb8cdf5ef9f. 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/JPI102000555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5314822789fb3046f91782f97f78019089a7ba958f026e6f27b6c6db9b371910. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/JPI102000557.
乱躁滅裂ガールズ (天音みほ・安齋由香里・星咲花那・堀越せな・美波わかな)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7221dba9b10d4f73099454db857284fcc17429e7d05377eb2fab6c031e3044. 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/JPI102000558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c650748600a3b58f40141766b70d82137391d776e394e3e942d29bd65f3d5b8. 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/JPI102000559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f38fd43f4eee5510c499cbb642b74a982651f711838de3388f31a22a2fa9392. 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/JPI102000560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983f9cf7a39b1bdc3c07066b4be90847f622deefb7723d88888f790c11a25ba8. 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/JPI102000561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f783ef8c5ecb00ff305d0a2e5c2d9ea5c1711903089a4906f6bbdc5f7239b83. 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/JPI102000562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a16c6a38e574596ee69e55bc2cb3f8d731002b4a5e75cdcb4314a313e35b47a. 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/JPI102000563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45182959eb5f4b00cdde1afc1f96ffa3dd744457ab26f2ceccc8ddaec7ef8ec5. 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/JPT362300004.