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 0xb04f7c07b6c79fabe9fa0adba3aa55eec21a5bb3ac9ae9bca55913b3a8812775. 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/2f139425-efdf-4ef8-adde-02197779d4cf.json and https://artists.proofprofile.net/proofs/artist/2f139425-efdf-4ef8-adde-02197779d4cf.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 0x5a088f3c4ddff7634df6c6ae8744e47fbb7b78b73fe65db8c619f5b75372d4a6. 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/ARTWQ1302132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286ecfc969e1737a3e94a40dce2449b7e8835a3eab5fb7445ca16867e44b1545. 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/ARTWQ1302136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x393bc770282d0ae36f272dba949c477a10eae2a38b890658078dbb977bc2a815. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/ARTWQ1302140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4da451102cb6a215f9fda2142e010dd562d755afed4bb4e4a7d960b6bf1ec6. 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/ARF061601742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5204efae5d8e1261cd832a21645fb88aadc1472c2bc6c64fdd5b97510bcfb038. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/ARF061601744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8629ffa51857634f09585a5ad80ddf12181767dfb9e2850a9814b49d717bcdf. 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/ARF061601747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a95573018e690b1615cf391f1f15f055b70470bfae1c95d6a853017eb43d1a. 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/ARF061601749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d782c8b8837a893c17579ffbe430af2d858449016e0e1042ca9aa12b81552d. 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/ARF061601754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a96316f1449f989f894e03196e6d4792b85a1ab6852d24e97bfce89eed5ad4a. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/ARF061601755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a89704706d4265401829a3a5a9043bc1b1324568d0caa194b71a7c73a5c6aa. 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/ARF061601756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23aa6d9495eb43160c3a3e4fe1d3ce63aed118c047ffba2c7d8eb085ad01fdf8. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/ARF061601757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60013ab0cc3738cdcf00e74d031290cc740d1cacfccf9652453e8db37215e62. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/ARF061601758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d000a990f69a732e8ca60c3d2eeab1ec9a6b1d1d9534ef60ddadf23c26aefc8. 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/ARF061601795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4327383aca9c85131cc31ff5fc16574714bc4c806cd27d091d831b66504aa7e5. 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/ARF061601800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46dd80d43cc0440d69b840a26e841a138095e3284b05dd3501d347f3456e1f0. 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/ARF061601776.
La banda Tatengue, Pt. 1 (Recital En Vivo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d00404b0c127204ac038f04c859e0c9f5d471e9a72e9a932f5cc749b25ba6d0. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/ARHXW2401974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6964bd01565034c272f30a8474b6cd02903b637980fe22a443706da338482f8. 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/ARHXW2401977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b02b1edca8341fd314b9c409ff582dadd9e97cb8f8dd33c8d18f7900b5b9194. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/ARHXW2401978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd439ba5b2ccf8549a90577aab934c32d59aeb8465e2fc0645efef77846cc92. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/ARHXW2402200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2067faabef214f3cd9d7ce0f40deb35569a8d34ee2b1655dcd6f209e29acad2a. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QMDA62519428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e860634bc68caa134a4cc67d4c375de99b0879fa2622197561bd8842e66c15. 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/QMDA62519430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb79762cf511e4903c9dd1c8b705ab4588747618cf9a3d3ed1510072af3a940. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/QMDA62519432.