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 0xd84bd27388f370396477a3f1247219a1db66e1d0a25dd5eb917e4e58391fcfb8. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5b4e5550-7efa-42fc-b8e8-d335f603a841.json and https://artists.proofprofile.net/proofs/artist/5b4e5550-7efa-42fc-b8e8-d335f603a841.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 0x19fb9d421d4bc52a60f63c4152ee30809994cb7cd26c3f815aeea78202968947. 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/US3DF2458346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3a20b599947dcf4c22c17a8e0f1c2b7acc4ad29f6600787df82e2d4f6aea2d. 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/US3DF2458348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x738c36eedb4e678a6ddbeae4fb9628d7102b1ba285683b80e90bb8c0682bc867. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/US3DF2458349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9420cc7a54a22283ad5ae30e79dff8e904f611fb972bf68d2649e1bf00c8cb. 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/US3DF2458352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3933016272c7465e8a94c81102d1c429537fa5c0f69ecf9674d66e20366d8b01. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:01:43Z), 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/US3DF2458354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd14108fa1520ef1e1d9b0e3a4c074082d28caf3e4604e5338fd9231c71071f85. 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/US3DF2458355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d22d3e91e4c866518519229c79d0b2b93277892f7e473df10fd1ea7a3956d3. 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/US3DF2458356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119fec995013820286f490cda4e999e720e461a988b7b4f89dda65156b7e5b9d. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/US3DF2458361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc69f93080fc1e75dc41360f28f48756451307025606d4035b73b17d3e0898e61. 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/US3DF2458365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748c5bcc67bc4cc95c061aae8dbb283afa8e39a63f56815f0d49ebf30d293fc2. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USANG2445885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff14142b312e8db1268fbc385804875ea38a17c9e214763e814405ac2279db0a. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/USANG2445886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6526f900392b466b17c5673b696516a6cf807f3160fb8e62d58027833fab58c. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/USANG2445887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc033360dc128b5c341df8dc453edb51f58a73726e6abff2837a245d09a18b75. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:28:46Z), 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/USANG2445888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea99b99f0ce95eb396a3d563d9356447360a9ff3ee52b6ad9708aefa7a1602e6. 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/USANG2445889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809b5c24648ab4751e2758c362979d7f0521671c8048e53ec0a56aa7e5743fce. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/USANG2445890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x144d579f2255dc1076272381ec74b3018cbce30550fc35bca358f3cdea958486. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USANG2445891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf948acd075919e74a6678b9f649482f0b007c87311c8028136da4d0e9acb6078. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/USANG2445895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b2010a1b1dc10f7f2b0b9cc77c3390b1200717ec226482436f24c3b5f5b1b7. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-19T23:51:50Z), 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/USANG2445896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763189caef00b180cbf316a17d9ed1265473fa694291ff5388685ac620aa5246. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USANG2445899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ac393d4a8f8d3a47e223b0937b7420dea9a3c5340fcf6fac2db06415624d4e. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USANG2445904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa942ac6a4bab219d5d20c73d8e270781dc8f38b31c05228165ae6ce99a7463bd. 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/USANG2445907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f9b64e92d8e0220130e5125ce5500bb9f8eb3f4798b6665f9c0a87f8bc5a28. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:30:04Z), 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/US3DF2578782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75fcaa4a3b21e17903c5fa5be252d057edb2292b3ff9073c0c71333f15044f44. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:41:01Z), 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/US3DF2578783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2760ab5de4049e9db8fc39d3450ae8ca029c05de2a2a65716d4ea39c1e11a0. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T13:00:46Z), 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/US3DF2578784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b6d78b4825f051335ffce4d2ff2a441ebf82c680cbe21ac9c5c4feda70938f. 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/US3DF2578787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04392340f371a89e097c1a9c647f1ccd61fdcfa42a3fb73a52151c9e1771ec7a. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:50:40Z), 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/US3DF2578789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3b09a56940e90124a9c335a3bdcbbe76afd17fb54c3a65e66711eb872531a9. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/US3DF2578792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4549f62e830ca134384ca853bdb70ece0990b12d4a19dcac25d44d9932c80dd1. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/US3DF2578794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f1ec7984967e2a275f0a5e7da209b4cd620e67937a1e171498ff920c961551. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/US3DF2578796.