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 0x716adb4fe2fe45c5d099dbc73c1d2481dc3ef5fa29996f8107b5addb59fa0b0d. 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/fbdfeb8d-c56a-4136-8557-cf1a06ad3214.json and https://artists.proofprofile.net/proofs/artist/fbdfeb8d-c56a-4136-8557-cf1a06ad3214.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 0xa0a0ed2428cc63cf2c6152ca17138fa38ad92d08a914f628284e8442183e9d55. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:45:28Z), 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/QZES51876635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc1f2d36af228fa584c2dd00d7a22828f42e2d0b336675b5e5a85894e06597f. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:12:13Z), 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/QZNWW2125365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf31ee060fad610021d9c65d2d1bcdc85cb134e96f1b78923a18a10a172ecada. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZFZ72237749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f9efaa3f75d86dadda47ded5877688ff50ab1449faa58961ce956cfca6b60d. 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/QZES62239185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e06e057a9d975fcc8a0ee0c47ff851cb7c506c4e531580068c408395210fc7. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZES72245261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6ad6b9181a0244f85b39e1393f9840afe6038b7a2cfdba4133f5d214de9129. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZHN72287663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba291fca78ab72f0ef35187e238b66d63e4a6a489badee4cacfac3c9bb43df0. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZHNC2223299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5457a5d50b0ef0202e54ff0bc919d6471cb1f1bf0f97502eceb4c7d01b6e7bb2. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZHNC2223765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7e0b2e6e58f0e8acf265fe97fe40fe11deeb17e6a3e7f4850c91fa9305bb38. 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/QZK6N2297368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6d1e427f1a2b4b411b5a9c8790840b7637684b52dea8e77961e297939000ad. 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/QZK6H2256621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf64d1c099865fec89b1127b5e7e0fe1d707e61bc50cb1bd60aacd0f88d82b80a. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/QZNWT2207062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e582037d7820c29bde634d3e86b8a7d9d6ed802146513c91432349d51c06391. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/QZNWZ2258118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219f716d1bf7be5c69d6aff6cd5dac90bc00ed436ee1c5e6f314df8cf2a2525d. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:27:54Z), 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/QZTAW2223345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08b51f96a76586680d9aa241cafdbd376fdfcc9d52cc300db1fce848a6dfb27. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:04:24Z), 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/QZTAU2235485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29677126add71701fe37de09864cbf8e7a36ac04e62f76912d951709f77e56f7. 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/QZTAU2234311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ede7658e9d0b248704490e68ce8778740501523f32dc16286ca27e1e1c4efd. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTB62232563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d018a8daea6f836126ead2c8a5c9b3e8f3ea66b9ac13580c3c97824c914926. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZK6L2330506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7716c4b8a84bed1a878d1d60b7d587f22f2b32921b8f2f806a16c6a750cb8f54. 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/QZNWX2306651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcad1bd284077ac800866c1b3f1cd31197558c3ed3c923a12e0cc425f226ca1f. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZTB62322121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd082d3298be50218e541d04d6153bff0487d5b65b5d308bedf11bd86042cde42. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:37:01Z), 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/QZTBB2348785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e063dfff0db272330a92017852d34fd56728b2989ce521aed199ff9bdc5a94. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:21:19Z), 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/QZDA82465135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3726347bbde6364715802a1447eef97b2af11aae8d9aac1e9ffa8355773871e3. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T11:31:44Z), 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/QZES92428556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736c3cfa9bed2134b1071763e9966eeef6798473e865ee3c182a73e60317589e. 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/QZHN82452280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09073e248a0f52d781f82b46bd2ebd80eda3a5ead04cfb78afc450ec7f787442. 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/QZHN82453513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52b31135d0cb3524d2963b3d798f26efd21c0693c8de3e15961dc548c6d4af1. Chain 2 (Bitcoin): anchored in block 958143 (2026-07-15T10:15:04Z), 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/QZHN82447316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacbf61a43cfdcd8368b96a4dfe3c8ec45f6ae7dae01b24f055d22daf198a752f. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T19:03:51Z), 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/QZK6M2409352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9b4637cc4b76adef4d84e5d6e6288e04a5646be828d19a23c6b98f85bc6163. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZK6M2436182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7505e9160469f4140d970160c8f12f4a37cbecb7e6ab35a74d91891db96f5cbd. 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/QZK6M2437676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82cdace55bb43c14dad5791ea367c079bf66ded299e61e8b65f2b98e35935463. 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/QZNWT2426274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916dfb2293da6eee1533dec3e3a0587ef739ec528803d12afde2bdbe6b9724c9. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZNWT2427833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc570d574c882ff5b0925f27d9e1ebfe64f38d07b98d882fedbb12c7f0e382fc. 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/QZFYX2568195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e1d6c76c95a51ee5a07a5c54465b57f3adca41fbd7417ecf99f57aba1bb4e6a. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZK6J2534393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255ecff775d8023a96c92bfeb66ada16b4b90ffc4a3406b53bcb36ac0707ce86. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZNWV2526751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d48e9d39e3c0a531ffdbf207fa27688247969c3ef37bc6b0601dddfd571beb. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:45:43Z), 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/QZWFF2522239.