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 0xd58bcfcd542c3a7f6f889eb857b9c7aefe7de426bb76ac89137ede9a86b279ec. 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/c1d5ce50-db37-44cd-8516-ebb232218843.json and https://artists.proofprofile.net/proofs/artist/c1d5ce50-db37-44cd-8516-ebb232218843.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 0x3e6ea9a28554b784b4127d77fe29d73aaea09d89935aea3690f31ae5129d4358. 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/QZTV32486301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a4d990c1dd233664926a836639bce0e94d4baeaaebb746894e2038ff125668. 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/QZWDE2415570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ce0fdca6f8408d1cdc02ab82e30068bd1ad1b7921a5d1826ba9e3d49146404. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZWDE2416111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd583198d09a65a63c7eb380845bcbdd56f40623b17e1f6c9ad50734f00de6cfd. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZWDE2416337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878b01b9ca8fed536534bb90d929cbee9f582f5528ea72e35fe11adbc2965de6. 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/QZWDE2416909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9ddc2e8b4e521307b2bf73f2ad899d3d6c1764f3ca5407f5bf05c36a186dfd. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/QZWDE2483849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53bedcb07ec7d801c8f384c3452e585a5b4109482ee4872fb9ab471c4e722f37. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZWDE2489122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc772d223bc5206914f00f1b4e38a95427f08261df0e21b711fd146d774c56c7. 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/QZWDE2489137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a683561ee6d61bbe062834b6ed19d3e46d6a56e60bd6bbaeb04c7f98b2f7b6. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZWDE2489147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf54c79e7b5ffe0d35d5bb9fbd006a594c30f0f30bd94853b44d37e14e7fc3467. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZWDE2489150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4feb4936f1c8bd14b56e9e5be1ac375750cbd03d09c88dc2d2d2f0e4ce2ed6a. 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/QZWFF2497456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dced6a3cba98b93c616c018791b7ad109c9e9f4ba6366799a19d1d7f1048450. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZWFX2458472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d8abebd112018314c54fd12dbc2c08a0ec769c7b8c3e9943eb98fea6b41bf8. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZWFX2457808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dfa59c20f57d1aaee55c6788c055e814dbf49609935108dbf15380c15ada704. 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/QZWFX2475468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ce889c56a1817ae4b0e266126318f7d5a3a596355b22481a20f978d14e8da6. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZWFX2458471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372dc03cc33ea8e0f8deefe2c4e6df33b5c086a4abb5a442f22df99f35b71379. 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/QZZ7Q2413014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f464a78eb8fd641245035950464fb9859af2869addffd3e0309d63f5455098d. 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/QZZ7Q2414836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376923c5586b8e0c942b23c234e8a72b0257ec7c887c3e3f9dc7d8e341d685a5. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZZ7Q2472684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42997d80b9943cb5595b80ab42a01025c165d32008ca8b9a77abcd4ab6b9d7b1. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZZ7Q2473717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210b823c408f1ad838c30e441739994b1c61d95c31eea79601f3fe058d5f0ce8. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/QZZ7Q2473719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdbcf7173c0f1961177cdedf7f5148678e171ae47443a05f3eb5cfe43e47300c. 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/QZZ7U2464938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0074e3023e276fbbb81298764b441203081f14cffd8350f75febb56112092bab. 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/QZZ7U2462629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ba9fbc7fbb5a2cff0b45e5d2dc8aa55cb3df9db49b84d276cd968b40e10d6a. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/QT3F22420805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26b5b371b491d618333d1ed6a0fb29d3f87b2b039ce74db212e7d65d56135ce. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZHN32519255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d9be046439b17dd1db351ee3c6ce2bdf8d1bde793de9b186282a37db030076. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZHN62556629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ac374c7588961255f7566893783ad3cf0c0dabbc9f15a3d01e40c43f68df50. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZHN62556568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a5ab6d229a8b5c55adfd6aeda6815d21295a9d26f74c8c21e2ce4a08dd9b3e. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZHN62556627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x732d5b9e81084f52be1bb217a044ad1321169e1fa9942dd3a0c1d1e4ba7fd226. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZNWS2554151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcfd904fc566f211693a190765a58ee835f106db691e7bfe721f478b1fd3bb57. 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/QT3F32556670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x138f22655ae09943382a3be2218c4fa5b91bfe2437b09108fb52af6e9e52a2a7. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QT3F42512482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f554da639936e91366a8ad71697010a04f0a56f5f30c04956f9bb06e4ab7995. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QT6EG2579846.