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 0x0a39dc714a591d518aaf6608ce66a4fe30150a742ce808aa3241e1cb04a458ca. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d1c708a0-8a1c-4126-b789-273f6eff513b.json and https://artists.proofprofile.net/proofs/artist/d1c708a0-8a1c-4126-b789-273f6eff513b.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 0x58bfe482e272fc155725ef78c768768c7ea0983f4c927225ab2d99fe1f67b566. 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/USCGJ2052606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda85001f1e501ff4976162a9e002406d8bb86d427d356bacf06212ce5a15c957. 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/USL4Q2077078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7db081bab5b932b94d6e2190e8c19ddc5186e6e55876f94e100444899587b1. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/USL4Q2077080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c917ee22c7b2117cfc5ca7988e3267cca5fecfc9fa729526150a01e1306012. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/USL4Q2077083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07b15b0f294f222e0748f3a40e4c676a88bcbf9a40aafdd03d70524600e3b34. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:38:45Z), 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/USL4Q2077085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd010913d01696c76cb2beed52c102eb11dc2d8cfaed837912f823b47a030510e. 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/USX9P2078700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2820581215521bec9fea7036456bb47652279960b4b997547b42f4501a703135. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USX9P2078701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d6814eb132494caaded98cae6405303a932aee12664e8e201d1ed1762482a3. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USX9P2078704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0b46ef10be9eaf0c655f6869e255b2d8e62265337c53bde197270616ab91da. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USX9P2078707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d43ee94e919b6824ccf9285c91fb2b72d17e37f026a32847b8fe68fe6cf1991. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:02:46Z), 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/USX9P2078708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x907c15001871ff088d6cf6fff99ebecb765884b37187341fb38e9ce595bfd5a6. 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/QZHN32145901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ab4a18f5e666614c6aebaedbca5dcd1beb09dba9433d28c9c9a6cd76cc9c78. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZHN82196376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58fc6ee17ee805c4b1488227fbb794e1b3f1ccdab66318cc0cebe4906fe65b62. 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/QZK6F2104661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc901216a9d765431accf2373d292cb52ee79d0a180afd064c087b2426a334ba2. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZK6F2104662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06ef4ca2b8b9d45b05fde83d6a9547e43abfe9dbf9a5da0d33d6b9e7058d457. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZK6F2104663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8dc61f69fa93b55b843365a5045ea92f8c9c37cccd03ff413e3e125c37a2cb. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T19:55:29Z), 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/QZK6F2104664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1de85612b27d74b2aafcd0d9bd4d1086ead16364dba12f1bd5d397e8c238b2. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:53:49Z), 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/QZK6F2104665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedcd364f3506211c7d4d027c2200b419e6700626a7b709036907be3a4ebb0cee. 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/QZK6F2104666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f97383bb68cee1d5b15dd1036d486bdc71369779e46ba8c417a4b415331b06. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:12:47Z), 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/QZK6F2104674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa574ec12bb85009118e245384b1f6bc74194b891c13f519b44503c3679c7088e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZNWS2171278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57add560848baa44e3697cc263d28e1dd9538ad194ea2f5229983f344593faef. 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/QZNWU2143423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b6dce02d6bee381dd3697364e77fd2514502fc2eed660dcc1a927ad8137c6d. 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/QZRP52130901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x184330c69818504d6aff5b38cc0fc8c06507d5f63c06cfb5224d5725d470c6ed. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTAS2159930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada5a797010dc9144fa19c632bfef41e47b5854f0c4f706da5d0d6fffe15dabd. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZHN72242417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x313ce7b7ad0f28f12329432a8836388a22ad52b1770c3d67eedac62ffc7b953e. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZK6N2263579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791afd11171fd685c97e99df9d393b335660117c628a1680008415811594fa0a. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:32:45Z), 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/QZMEM2261562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46bbf36602093db617d4094f13e7264d5d55c1df214b5f963d3ddb32a7129ad8. 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/TCAGT2392948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3a4145c3152efd87937a694372a531d61c3b0886ea620400a81d3ef0236f6f. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:47:29Z), 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/TCAGT2392962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb49ce0fdcd96051c3fd034b069ae9564491294b9dca8f6ec5d8cb2e289c89331. 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/TCAGT2392967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba3bbba26a0187eb242a47e0a6c9a6f4bc840d6e51bd8177c3fb016d9540d1c. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:05:52Z), 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/TCAGT2392976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc524660fba887cd60e2e6c65f6b29a2a40d4af8d722cf5e6939bdc449369cca0. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZHN32260550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2534f0a37bb941d471cbfb9847c8ec5a32306cd0644df6b4bbc54efec33eb8d6. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/TCAHJ2364474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e0836a08f19b4d504efbddfdee099f40cbfdd5c96c27c7bd94c91cb53019dd. 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/TCAHM2359091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617dd8e07536f7402fe6bd591e58edcc153bc918eaa41e0552597426f1c0384b. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCAHN2329850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ab73e15987ad22a24f72e6e762b78598490fab220e1dde8f6d65ea1d19d8c3. 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/TCAJG2514347.