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 0x4deca6f21ea94365b335b256e97b3dcef0cd96380e15e056270222527617675d. 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/df600f29-1d99-40df-b01e-054941b81310.json and https://artists.proofprofile.net/proofs/artist/df600f29-1d99-40df-b01e-054941b81310.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 0xdec407194a28908dbf48f6707848b7a7f0ca76bb482c81e7b5241b7303d05ecb. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CH6541736089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6481824597d5efe8b25d1048f622206c2ce9878e8f3308676cb26ff35ee54788. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/CH6541736092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa030452bf599b301521fb237050717ebb1b95a899505e64292ad3d8a3eff7722. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/CH6541736094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e3ecc5d99f174f2f5c540f76cc8723ad75af00e3b41e89201cac8054c7c5da. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/CH6541736096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34cc03e2ce34f8b95b6f2b8481b1fff22ff00955bfe9e70f236b9f3aa0368f3. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T00:37:18Z), 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/CH6541736098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae1460f951c63f112838b8802e7f22c6efbb98164427a36ecef6a6c75caea6b. 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/CH6541736099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2929c5e7dfda90ce3d3d58f282ea6d92464a246f42abe1ae32163930c8a30ed. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CH6541736077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa727deb9f7d710972da6f4461bd5d815542483ab6e39d70183be5b5f9d113152. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CH6541736078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8b67a940651629c2c01ec78c32643cb68150f71203fb8cae66aeb18068c7c2. Chain 2 (Bitcoin): anchored in block 957540 (2026-07-11T08:19:50Z), 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/CH6541736081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28484b264cb52e35df970be63abfd0978f3ef14111199e615a3b2aae515e7098. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/CH6541736082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572b89d2e780961722912aec4fb4ba406990d8ada488e847f6ef722b35610b95. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/CH6541736083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdecd1b87f663d2c9a35c39eb06011aa0cda6f40bdec13b8e47c62ffafd67d5ff. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/CH6541736085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413360e80f9774654c8b69413d724cf1ec64b40b9273a6ab580db925932701c3. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CH6541736088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15aad02c998b0953b1a8f60c9a8335605794e950c3d49753d9abd05b75e7d248. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/CH6541736103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3238c9c05a33ad5cf837f03e0d5b2a717b1ed5d473a10c9ac19b24dbba3c7728. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CH6541736108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23275df4781dbbe2b95dd96db9f34892047901f0d5687d257c559d04d0df99bd. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:11:17Z), 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/CH6541736109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a256ca40fe15766dd5bb0629a4ea2e96933cebc73ca40c45eb26c893c2d7f20. 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/CH6541736110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a0692016745cb5465a64b4e0e4b2e96298658311165a7bb4c5740d490912f48. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/CH6541736111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe363576edb9e14f59a9369cc4b9b8bfdd685127a8aa69943026a315f677f93b7. 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/CH6541736113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ab99a6d7d4677ea932f210ed82e2d2df64c51f8357eecba516ae51e5673409. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/CH6541736015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82909ad9fec8adf4e757aa929c39f33d6c5c5a50297376c7d2fff21e3ec8b45c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CH6541736017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838985752cf83a6728f4f085c641fb0c4658e42fdd17742d770712b7fa624348. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:30:15Z), 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/CH6541736018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255342d951b9c5c3d900304ccc5d1e0d8fbc7f09d42bb69fbb44e3ec6853a678. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CH6541736019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4098cff7dd3517c96077b4c552be7f866bb2380861a782621c112c912b8be84a. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:46:24Z), 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/CH6541856053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4135686c54fbe92948f510dba3577e6d34c22904fe14230f8d27d51c7e0bfbb4. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:57:06Z), 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/CH6541856054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f7fb42f09edb67e788c97394147974bcc89a007285e585866b63baaa5e5436. 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/CH6541856055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f9ba86f62b6e1d960a1d8d8d26ac976ffce90ab06f5b61bd635ad3087e1fe2. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/CH6541856056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8ac4012b8ee98fee9d14b336f22a001c9d48c80e3074cfefe84be62a69b0bc. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:08:18Z), 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/CH6541856058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc357fe6ba0b15eff52a3499d95516a333d5d1ec51f1e0855767fe17e6ff09f4d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CH6541856059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f8e2b7d1710ca80a3fa4345d1a3f348d5bd0ca9949d092e04ca0cf1f093ff0. 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/CH6541856060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693f8c37a0c01e305765f12d0244d89287ae7aceab343cc805d52716bf55e003. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/CH6541982719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa644d34ad14e1205d44fa5d3f3337f128433a0771cb637181a86ca9747c9a7. 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/CH6541776500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd1b767686b465d0f5039b001f616cb2e9e679bdc4a70dc1d850b9f4fd76ec7. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/CH6541673118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84bb502ebcd79860bc025730ba40f1b6491c28eaba7bc78dbf4a3a18cf9a03fc. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/CH6541683871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa107e0eb7c5273fa6299397a6d92d390a813b70ae55210f34e5c0919f64bf41a. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/CH6542333185.