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 0x9c40e606f147b6535c0335e92e1da39c0501cb7aec13a9f19f60331a8013e9dc. 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/e6b453ae-0c6f-4a6f-83f3-f5b0b3cd21fe.json and https://artists.proofprofile.net/proofs/artist/e6b453ae-0c6f-4a6f-83f3-f5b0b3cd21fe.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 0xef9f2002057efab0761c9d7e6f1018b8fa00918d71292d16d3257d8e8b2112ce. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/FR10S1794136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0bf15271aaf499df8bb63a2e1dd4daf37d88c80acffdd9e57ec83f69d1afdb. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CZK801500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742de06fd77c8b3a67311736871574e51ec3c1bd85ac1b204a0054a45301bf70. 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/CZK801500031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd63425a6c9a94d098bdd3aa9683e336bc338366d2224ad182417147eae6f2f1. 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/CZK801500033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95cb3f32c5b48676e60aca08e5c9973c76aa05b8b0e13dd0e27accb0f3243f9. 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/CZK801500041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d991eb5c4f9713887efc926c05ce308e3f6170f16095f648d790d1c74b793ab. 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/CZK801500040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e641112554d4f5cb54f005b953520fb07e0daa0c248be4a8880f1276113aca. 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/CZK801500027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4581003701bf17732679a4c96291842d9a127418558b657ee647383a2ab94b8b. 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/CZK801500035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1a3ba8527419bfe2f21ca971bf17812b9a5c051ef70836cf37731f6f6c4f88. 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/CZK801500036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0bf15271aaf499df8bb63a2e1dd4daf37d88c80acffdd9e57ec83f69d1afdb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CZK801500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2bb4c98680976b8ac01d803619a9623875396fdb5adbc41ceb4382419766b53. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CZK801500037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb576c01f427a4f4bc583ff9d8a1e2620c7072787913d9b0b2bbf072a94f1c5e1. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/CZUM71800690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68be680d7d4e58d375583ce706ec630e92c3d345060b26b9fed3d0a0ed8ca2e5. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:41:12Z), 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/CZUM71900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30bca82b5f28b82d42cd24a0e5e7d4e686e6380ad6a1cdbdca827e7915085d1d. 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/CZUM71900233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb2dcff235a7d3a7c2b42e2034ea7ef4c76e5bc06d2820545ed09f838ed17c2. 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/CZUM71900321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ad7155c8e326bb74c2dbf14574798df928dd6220d2392331853d76e7bf2e47. 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/CZUM71900323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47c657b488477a564aafda5936c472a25248f2b52edab622710682571c7ab0e. 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/CZUM71900324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf6b2e62ed895e8a8805aebc74fa94fade8ec0be7e9e3306f9c753b11945c02. 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/CZUM71900325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887d81b584c8b204cf23e7f9b9c0bfb14ec5acec9f04b429aa777afec6cbc008. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T16:15:58Z), 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/CZUM71900326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e8af823ac9f6a5a744fbb15795d1dbe27a943a34e091d2f80aa67ebbc448dd3. 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/CZUM71900327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8366bf3c12e39d424876ea51d1bd39b75811dde364289f3a350fd554fe6d6cc2. 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/CZUM71900328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb665a70233f6847fd3298a8da1ba99e47d4398e8768c9c4db083473d36de6a02. 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/CZUM71900329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca87c553b581cea1d5a46f4382da9bc72a0e66a108b539df7dbef95798865fd. 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/CZUM72000571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c734ab24aedb42d3c9d8ad1309b49bf597aa63546efd58af28f536467804f5. 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/CZUM72000569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a06efc5cd5b6277b44aa78ebdb0bce8452641418470319c41bf66ae64f26505. 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/CZUM72000577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6f8b1f5b78500dea6e5932c7f8716de70bc0f437df96a61277e72bd45fec2d. 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/CZUM72000578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c417dc426bbee21f90e9e1a8dc7fc80a7780ca990868844b2e43000ce630f7. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/CZG491000102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9556ce09f9196e2fe8bcfcce55afd49085748af49581fd0093380a6a31efb2. 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/QZHN62077369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x183a88ca69c633037aa80db11addbd1b717d9bfff173dfd49370be7b9458f55f. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-21T17:07:02Z), 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/QMBZ91593317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602c0eed37c5dc624589db3e57c1a40c2fd48df034dea8d928435e160f4ea5ce. 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/CZA232001330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c95c06236305617bb96ed768ff93fc3846a2f893071c642e1fc87bcb71a004. 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/CZK801700065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35038876ac2486b44d433f710df7d1342d97e442aa5f176afbd96e999958219. 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/CZK801700030.