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 0x3323b26a083d6e0c4c5a36549caa26587408cd38a1041f72f479e61fa5716037. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/af14646a-0fc4-4a50-8d67-d4d0c8e8741f.json and https://artists.proofprofile.net/proofs/artist/af14646a-0fc4-4a50-8d67-d4d0c8e8741f.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 0x25b3f8f1399805006285ce31e8a0a6a2c6c429f4974a784b22c871c965edcaa8. 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/USQY51494427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42a1378486af9a8e3d0f866bd365f3b54626d896ceeeb88c938cb0450e29f86. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USQY51494428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bfc991d4b381b22f0e8ddc5a038ed606ee445e2d56a415e97838cd604116918. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USQY51494432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e184bbe6a17d8ec335e6c3e688c240cdde5f43260935973b37d5a44b1319026. 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/USQY51494435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5cb19384fa5a4a767a676ca9d8a61947569305869117da4f5c44027e8ee6d0b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USQY51494436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d22d39eae75141d66cf8944f9a919b474d796cfb170686791195477ac4ec7ae. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USQY51494438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03627d356578894936a57cec5eee3c920ff7093aec6a68d5dbcb552bb98a3eab. 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/USQY51428712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3f944b85e28a792bc5f32212f377175c8df7af8cf4e76e1a4c0576824da5d8. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USQY51428714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69228bded63248a4a5bdf1e24947dd213ff6c703b52b527dd833d9c770952630. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USQY51428715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ee82d79f5523ccb013402cda8d977168c37bad6258cd1848beba7985fcdacc. 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/USQY51428716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2fea1920e3ad66bde275671d295e5c73524df8ec132e7c8d2b6e9700ae535a8. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:53:21Z), 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/USQY51428713.
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 0xbd96afd21be7c4cfc8dc96307da42dd8ab0c5c088b898dde8a98ef152f67fe8c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USQY51415116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b22ddada59bc47f8fcb34c520025532aca76276d9aa0fe6aff72aa15968d74e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USQY51415117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f7ae1fcda160dfd300eb975f43dc7a8acfd9de8beffd6ec8ea3cc5c608b592. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USQY51415114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35e125d6ff0eb156e20bcfe969c423b5aecc934f3769bc20ad533110f22be9f. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USQY51415115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f71f1f9292a19f513b29e9f6c0dc38cacd3246965826da206ea34eaaaf7dba. 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/USQY51414578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb808edc4bce5f23ad089db1fb5f92d3aa76f8a80bac0597f524c9e3a456b08e5. 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/USQY51414581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40af03b86e61fe843bb984664ab43cdaec474a842bb193ae48f8aff4c21565ba. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/USQY51414577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ffd49434fb7781ac3584e00110aa118adc57355b3cf60977b2c76afbbd2eee. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USQY51414579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6dd45c1d92cbcd758301f8571bb0a6651c6e10b877b0f0558d73193ab5e2b2. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/USQY51414580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8326de9b83b443be764c38fcf014916f5617795d30a3f61c547ef9a172a7cec4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USA2P2012458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ffe47e563a1cc7ce3dca736e11badfc0846909e8d20bb89631475640b7ad5d. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USA2P2012460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b647fa2548eb652f135ebbb120e30650312ef8c49efd3a37d33e2f220c8f9e4. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/USA2P2012459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaafc413f1cc8af7880f433b860480d32ff4e665e31f542a63a67a6e9d8bafc17. 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/USQY51415110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109c7e1f093fafa312ecd8b677bf2ac10141ace8d0c5850367e31d6df1de186f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USQY51415112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79aaf74eaec49ce0a0272980e0b454b7df6314fb8002592b1a39040d95e203bc. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/USQY51415109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff00bbbfe70fc275a7c000bd96aa06cba46e4663443a6823b195eb6efc9d1d8. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/USQY51415111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25a2e782ba17fe52ca0431b572fcc6e9aaa1b099943dd1befaa35d893157fec. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/USQY51415113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a28168b9d5786dc4591751873b8969a4f323c573cae3a2696bd59e5f4c378b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USA2P1298175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f5c3176d7bd0698d0a5a49099651682c9e209980bcead7731be1404538aefd. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USA2P1298176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04ae678ff1506b372442aca93ad5b7d9e73dbdb4ffe57893862b5bb94a2b896. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/USA2P1298177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4075d366f66d621b4ef576ff8e3b41127b78861800ed6527253ca09162e4625. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/USA2P1298178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ff69b73e05df5ab6b3ea200cbc64b0794a53c4580bbd6b93c3baaefb2dbad8. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USA2P1298179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14bb8066b314a654ce6a6641a755d3e37dd10f6db14af013774c7a6d7bf60b71. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USA2P1601698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9552084ff0fb7985625e8d1f6f813d393b5e0549e303fd9d878953fd91176a8. 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/USA2P1601699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6694359e766ec3561eaa943c74babef07c82256e5154f8cddad82b969db4ef. 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/USA2P1601701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd3042fc14e36655c9d0e7029af2d27c59a5e37471dafce936b120597ebb3e14. 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/USA2P1601702.