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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b596962d722aab5f206d49336f3460a97046d73f649672cc7dc77fc98a7ee3c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/72c04bd4-b579-43a1-8e3a-e0be767a1230.json and https://artists.proofprofile.net/proofs/artist/72c04bd4-b579-43a1-8e3a-e0be767a1230.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d0f919e4a2616d244e2330745dbbaa41dce0d05f31eac3c5dda4e2ffecd915d. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/JPZ921811060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01735346d47739f6bac2d76823f1955f91143664201053e43ede814ead6e0de8. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/JPZ921811062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39910c132a106cdcff564f873efb7b7bbf4839f88930f815669f483cc9fec0d6. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/JPZ921811063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db7fcb5ccaf60791d74193a2ac226fe2043a229412eaa489f5fdbdf31c32c3e. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/JPZ921811064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d73fde13f3a99fcdaebe937a4e835be3977e91ae59b8a6b5f1c08bb80e63b54. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/JPZ921911773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a71808785306b0a0d772ccabe002b7af650d4f01552279d6125ab486d86ab5. 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/JPZ921911774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfceb899f1bf8192f2037048c0ae732d910b07896c919bd43034c516e1bed324b. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/JPZ921911775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e3155698d2fb569e4e8dd88b42e2d14aa0d75ed809eaf326ac956e9c82cced. 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/TCJPL2066856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ce44090d70ec6f25f6fc656cfdb6f58476b9050f0f2c10f349033e0b87519b. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:20:02Z), 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/JPWP02000548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x937445c7603b3383b4f3747ba7a5c7e9aaaf02ff5d1e5584d9630180736c2a98. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCJPN2027705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37697af6fa045e3c1b26638f609f2ba217997abef5dd3e28acb4958a0ccbe25. 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/TCJPN2027735.
思い出はいつか淋しさに化けても
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x964664c4addcc2fa47daf0876d481967e726cb38132ad374ee33ed6bde5fd49e. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/TCJPN2027739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x102b847da83a683f5e8b651198542e3e6fee9dbf6be003f66f70f23ba125dde3. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/TCJPN2027742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e82010df37af8756410f34fc123a54839dbccb6511cc536e4c844efa0670c9. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCJPN2027753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a8f962773f392cab33b4d9ca161b33a69b5cec0625966238a9a95f39d780bc. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/TCJPO2111596.
アンラッキーハッピーエンドロール
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a027b50af92fde7a5045d7ae3a8c32943f840fcd7f85d05e7ac239466fbf03. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:49:39Z), 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/JPZ922106542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f4f5e9e422fed6c9b82561916fc1fc28b3b2bdc7e7fcaec8635a27fb5ce36e0. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/JPZ922106544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c84686d9d14c0ddf43f0a02d2e9e240ee76238e9e63115e7c9dcce50c3f18c1. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/JPZ922106545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a3fd00bdc9d0e95af5f7f4168a677a6201426b287489e76d966c3a34f98549. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:46:36Z), 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/JPZ922106546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1cf238b7df5c0149e5901e4a19fbfa4da63d44c244d3ecd6646a43e9882d94. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:45:19Z), 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/JPZ922106547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02bdf41a26ccdd44ad32d6306747045eba497fc4031710eb2369ba6289a85698. 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/JPZ922106548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a561315eeaf98e26e41a0b38223e7bd3a92d986bc6514edc405422d1ea5a37. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:03:44Z), 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/JPZ922106551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc98f20a89a02eb62708e467395f5a40e4903b339a34812cce55807d1f6637843. 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/JPZ922106552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920f94fefd9490a9afa0f99a4fd7d0074cd119d241f3deafff02b4ab4eed05db. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/JPZ922106553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd0182c7be238ce25ae08fc0a3340f240b78a83e717ac8af3e870f3fead65ff. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/JPZ922306234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5dd01f77a7592a6f0dd11042b919a4a57d72dfa0c1279381850fca81d3a036f. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/JPZ922306235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48654fbec60949e7a17f9a68008d00e4b96400afea693b5f6c7ed4261600f7f8. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:27:51Z), 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/JPZ922306237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123750d8a7fc3d3fa82a737520c6cafb5297803c0f147a43065072c2eaf0d341. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/JPZ922306238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb60e28be2d887cd577b988476b35cc7e3285dd15990c2ccc00cbb37ad9225ed1. 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/JPZ922306239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x183914968d4720f5fca50df047792c6e02d4e1ba76614dee1915f3c04561ffe5. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/TCJPD2406719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x638b44636d3ac76f178b129da43ccfe8cc7756398a483e4e518b9fe85c164692. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:14:38Z), 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/JPPC02512249.