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 0x8a9a936d16868b37eb034e7858aaae0603a7f137e39fe8ff38a4e18e39af4c12. 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/84c618cc-31c5-4efe-9daf-5779bc181f11.json and https://artists.proofprofile.net/proofs/artist/84c618cc-31c5-4efe-9daf-5779bc181f11.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 0xba39555ef5fe3e7f7515005f83a3bfd4bde34671c741e851c39eea5325ddcc10. 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/USUYG1138239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75548792d05497c94daf2e941d6a7d79d915acb678d6f2f08397858d179d19c1. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/USUYG1138242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f64c26f78e576ce57fef9759164401f01c3a119f1bd03b48a99150f2fc91e0. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:21:08Z), 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/USLD91710871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x977911ba452b233a025f3038844ca260dd0824fa059cd2523789f5f5c8c99009. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USLD91710873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a9579c2e532e5fe6e31a702187b3001aa6368d575da0775c16a83a72b88aec. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USLD91710875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f1cf0df8395574bf808f31befef994303cbf9620e6d7a970bee2b493fafa61. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/TCAEB1975078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27eca9280fe2d5f377d3ff0bc875268c633cd8abd7febf636f62350b89551e8a. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/TCAEB1975087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b70dcf61975d06cc93255db2004024a9cb2a50b033da4e2ba7b16c7e8bfcd3. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/TCAEB1975089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba1dfe99d00d64d1899eccce5106af5ebfb785f15a5007cfde5b552b1f08e28. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/TCAEB1975098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb97d86dbd7a3a7ef6d9b62611ce6ddf488915d8b3b0cfa3722cc3f469b8514b. 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/TCAEB1975091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d2a929703f230cd2c32e762426cd627936a15bb3a0ad3674b0a9f7f6721887d. 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/TCAEB1975084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b12df0062e096dafb1d1e32681761f58bf991491a0be58aeb0cb6443ac4bc16. 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/QM33L1700182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb553aaae0f3a83ae6006698969963a61f9def638f6f3e8dd25f532fed2c174e. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:41:49Z), 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/CA5KR1980606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4c3789574bd468913825af1d0f9b3f3c693c30cfd896b6284a9a4376073d88. 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/QZ67M1992236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8a2c9419f9f1916546836ca14268d7c14f055bf3cf10b0e8fb2372ff50cc84. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/CA5KR1980608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066fe95ff7352eed748c295fac687d8567d72a03f8a8bca28ead54d840d9e935. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/CA5KR1980610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeed38000488d686b94f95e3c1e559bb55fe7e11a0244706c2110e4e6ccb355b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CA5KR1975989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd2f9256b76694254177adc900570366b2a2f9438e4d45c4d810cc5d51be63b. 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/CA5KR2090210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e8c3664cf4d19d69e209f2208d0c407fc24ea3ac8ccfab15e3419c9e7987dd. 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/CA5KR2111243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1321d55b834e360350d51f89961c87044d8ab702ae27d8fadee9ae563b516296. 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/QZFZ42103012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a127c69d492e8367ea098d5f33f480aea4524c50b098711c3dc2705cd9155a9. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/QZFZ42122198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e3990ea978deafc1047336d46332021d3c7528a808a470972f6d188e65608d. 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/QZES52101259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f95754b3a21df1422e26cb147405f13c3577ae10de9a237e6eab8a9b1eec664. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZHNB2285284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72beaea278c90f784a4929e39c84753024bbc42e12fba53b22d63c13b3d1816c. 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/QZTB92354083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc39af72e7cee63857138c65a12c39b7b6433b2f64250007277a69cdeef029c. 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/QZTB92354085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe670f6ea9fddc53461501ab5d93cbbcd0d6dcdb00612cc5cfc8c5f9f499ad640. 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/QZTB92354089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b64fd23c723258882ba5c7388d37264812ba55bfb321bdc81a8ac3819171165. 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/QZTB92354091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f95754b3a21df1422e26cb147405f13c3577ae10de9a237e6eab8a9b1eec664. 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/QZHNB2285284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb29ef5d23595329a6942be267f7913a56c930c766e42ef80a7798b81999c5a. 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/QZTB92354096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291bd68b87289fd53186900be6d23cf7e7c51d170b635859e641dfc39fc15e39. 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/QZFZ52179757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7066a7b64429da0d36dd1aca424e95940ebab6b728d24bc4a8ff53658859a180. 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/QZHN32104041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408a7a6fcc41306f2fea64328de5b3b6b33525ac76e7c141497939fc600c47ae. 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/QZHN32104042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7066a7b64429da0d36dd1aca424e95940ebab6b728d24bc4a8ff53658859a180. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHN32104041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408a7a6fcc41306f2fea64328de5b3b6b33525ac76e7c141497939fc600c47ae. 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/QZHN32104042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x937cb08b9ee46fe5136e40db53fad60228725dcc7db394cf1fd4c98f16345f70. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUYG1135802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dcbe0c4cb2a998b0c6829de968da18b6615a5a4bd21bf0313bfa7121f72af08. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USUYG1135804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2673d2d99df5dddc937832b33fcd7daac5568163dec88de260cb8505e449de9e. 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/TCADI1789271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb599cf481ea45a7a1d3591d4e01a344a01f557a202ede873b46e817ea6f886c. 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/CA5KR1939189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b06d1a57621529ee79117f3aabb138066b8b591f8726665932650e0fc52a97. 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/CA5KR1939191.