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 0x31a3c16932313c621433459f3ea5a0d96de5da5ea10895a2a162f3871b1ca480. Chain 2 (Bitcoin): anchored in block 953875 (2026-06-16T02:12:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/07fc6827-4322-4df2-ade9-3f0c57d44854.json and https://artists.proofprofile.net/proofs/artist/07fc6827-4322-4df2-ade9-3f0c57d44854.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 0x8ad09708035e977d462e3bd34c2c778e4bd2f371af39002b5960471311ecaabc. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/QZHNC2278747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1dfe5d4a742f78cf53fbf6c9213207e50eae606b6e6ef4d908bae803c7b4245. 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/QZHNC2278748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb28ffbb1aa2fc845d555fd5a265ca19095b59381ea0effeb500eae807ceedfc2. 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/QZHNC2278749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254fa8b81e84bc68fdd7e0dc1b091de2df85995a40e29def1b5f493deee77aa4. 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/QZHNC2278750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85bbaeb75a73e1c59713afb9785baf775ea399be80f27a7439f0379c1ec600ac. 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/QZHNC2278751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9017b0c5cc5a1705b1b892611cc6e662423bba2d797a87a0cd9a5d111ca4cb. 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/QZHNC2278752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2477100cd146da7ae6b8c9831d48ac189820aca29614b8a7c1693d1f7cabb72a. 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/QZHNC2278753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0fd35b9f1493dcb37cd4ca927b04447934371f6f60f082c554ba45decd16606. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZHNC2278754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31fa11f446ebaa9bee15ffc99100cdfba07dce4f835db74aa70c2c6f014d6d35. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZHNC2278755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4907cb23d0ea8b32aaab845de3150a74206e3e9dfed9f4c4bf270ae3fbcafe5e. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QZES52030554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7826de4a4e4c18d9e3000d313ae2965182c46003d73caaee7a57e084c965e50. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QZNWZ2093849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1048f87c1067b7296aa7682edddf82e0c69a5ae9f7e92c6e193b1c9dd6b7ade. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZHNC2278756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9438e82e1d4c107b5a03e5b3bbe72f2239a02c995a85b17c04642d507ef146a3. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/QZHNC2278757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429d32f7fe04b5e109463e60656e21a15f673cf9c984e702cd6b8835c881c998. 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/QZHNC2278758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71509987e7f4a00d5d34c62537042a36db4d1c2d42a173b2bff5e38246a74eed. 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/QZFZ42068891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc51b0e0ddf440ef712ad11c24c61b2b8c18d0126d0ebc75f633f3e914c50708. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZWDW2302101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f05f04ee686cf4a0073289d245059a2e2c6d6b1a5759757f9c7ac024fe1a94. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZWDW2302102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4382aeb67127b1cdbe331a818e80c5bee5d57f539c44f09ca552669587a1763. 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/QZWDW2302103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee9cb0d473c10e68cf99e7ef66c4e0d41b62156594d2e81e2d9bb52aba64fde. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/QZWDW2302104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73b31c6522db0cd936ca2b7b6ce5be1c901ae382c2df573aa9e3de259af55cf. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZMER2366466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c3cb76c8785500d1c8bfaeafd0a329fb75dd53d810695b99e9368a5dc1bac3. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZFYX2346981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d46e700579850715b69896782e1cb8094417b22fba0b10d5102359af7ecbd6. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZW9M2261142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218882948a96d5b67f6138a81f37258aba934827fc1066374a45872004b1f168. 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/QZW9M2261143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36508eeb525a7c5329a6c73aa781b890b55fdf75a3af12d05e95c4d6c156da0. 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/QZW9M2261144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3e132c72621eb7bf0f8b825d7cad3ccc494953b4eacf7c3edf5cf3050b1840. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/US7VG2308712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5bccd2297dd2f498f03c8fcf99a486c230c62b764b2b57aa9824d5f9d95ca1c. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/BXKXM2200043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a08d74eed40e7a9a74a3d4ec4d7c15793d6a6f6126a917da0e5bacc6cda642. 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/BXKXM2200044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040cae9d2d5b93507718b724edb9e03a3c77d706c19661b5ea447101ed44e566. 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/QZGLM2500695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df047b6ada3aeb023261f1672ebb970f59b262782869ab27a737fb3a5ff741f. 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/QZW9M2209732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74d79dc13204a9be0085f40cfa72f73e0e6daa4dcaecf8e30b14d11dcc10a14. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/BXKXM2200045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a08d74eed40e7a9a74a3d4ec4d7c15793d6a6f6126a917da0e5bacc6cda642. 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/BXKXM2200044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a42db4af734ef1bc313bdb858029a8bf636c3384c2252d1a4aee2656515365e. 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/BXKXM2200039.