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 0x462b95018c0dc82df78991516d8b582090531fc581e05d183558756dab0189d7. 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/2629e7df-c317-4a0c-8440-16e9de14a7f1.json and https://artists.proofprofile.net/proofs/artist/2629e7df-c317-4a0c-8440-16e9de14a7f1.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 0xc1944a79fdd88e91e8127daf0684f9400f1df3bc592de4d714318b58188a5b49. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZMEQ2402247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc752cd97c37593fd84afe2d92db456148adbda655f2e67b279c19c2315e382b3. 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/QZTB62491009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910558a785777a2e9abde8b23c40c6d08f74a71a1dfceaae17d76a855c93d71f. 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/QZTB62491010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecdaadacf8d07c79de63c4dbc40dd2511dce7c265ac1f9d2adc419b8828f1b7c. 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/QZTB62491011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925bf218e88c0bbcb9e081ccd93862a7d65300f4ecb85812afa322dd8b834a83. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTB62491012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe119f87d6d7d4e9b499e6431bc319589020bd3894e152cbd4cbd6c7560744ecf. 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/QZTB62491013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b566c8936b6d584f943f67b46167218cdd08d8e27a4b43d98953205719b789c. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/QZTB62491014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1779ff301d76a172fb1350d4812beb378073d9a058b0a990ba66d88acc697c3. 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/QZTB62491015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e0eebe2bd5ef7755bb79f2c6b79c3fabe99472c2a7707a1b2ee7b349455932. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/QZTB62491016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd378a303e884cac7c829ecd06d6eca0187e6b1d9acdd28688ead0403fd4fc7cf. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/QZTB62491017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef82e38b408e1f7efae37ff177ef55c968592685effc4153e3c315b2b2c5eacc. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/QZTB62491018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9586ccbb0963d6b7792e3a4acf83c0b6c4c3afc05b8c49c36042171e19e613a5. 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/QZTB62491019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9f3cf02492d1ef9d1ebb6f32818c11d40a3df091b00ab230887ad61cd1b7c5. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZTB62491020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc47ad3dacd249a7fa96cd52d53e9c17f5f7f10cd4ee2826e35bb43bdd4cc21f4. 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/QZTB62491021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ebef8e6482d2f80a55cd7abfb9c8ee925bc0dff307813323d16b81c346f94e. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/QZTB62491022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3954649d075f87fb7c03f81db9749acfb91bbb4952d3bf5d4822f4c0da2bca8. 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/QZTB62491023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a72699bf61af8074a682b66da43e0506da7cd528805e16f907f078c3e3a8c7. 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/QZTB62491024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2e47706bb66c30fa4cfed39b931b2cbfe9efca20ac92bb9af9cb45acbe8954. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTB62491025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe950a89f0b390f4967fa683b097ea32e5d8a9a029ed0da45f4149c35df63f183. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:53:24Z), 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/QZTB62491026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1621e8b6bd8e79b5cf3c3338f4e2f450d9c2c1599c2e1ac9e3788dcddb2e8d3f. 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/QZTB62491027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45485b60088bf06bc161057859b340c10d620c760f294d00fe80a2fc0b5d0550. 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/QZTB62491028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0320ccbc2ba2f7792c1125130d0a41b2769223090076f297dd83b96bc056e29a. 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/QZTB72405722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f52fb178bbeaf00f3de96d1987887bb9bfa8bd608ed8d1248f93b1c5d19b471. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:46:05Z), 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/QZTB72405723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b7d9a7f86a6e732edfd4d4d12a4590fee10890e95591fa9e2d26d412b7010f. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QZTB72405724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f499d5418a004f5b0683fb1c1a534594fb2a0f2d5cf7f7ef7a7acd91245710. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTB72405725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0979504247fab3441b87378e3a7342ee73cc9334f41f53d6b54505df5ace74. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:07:48Z), 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/QZTB72405726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbcb4122305ba41145c53bf880b174164630b11dbf44f98abde8daf86b9573e0. 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/QZTB72405727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a34fb4b83960615f2d6bb3ddc4111be993b4300d8905ea90da5b20d56309d41. 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/QZTB72405728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687ab29877a5420638fcd17bae5b2f00dbad50a350589e5162756b7814e4ba7b. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:02:52Z), 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/QZTB72405729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd624f541b1a6518a77447802c3f2ff8f5ff11a1ce32fcf72037712b35b7020b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTB72405730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba11cba161589c8b4d7b666287652134b27351f826920da25afec36d721752c6. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-20T00:21:51Z), 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/QZTB72405731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69bb8358b011208ea5e2a4e0fe8ac2bce2bd50314fa42d024bbd88172d7c379f. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:43:46Z), 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/QZTB72405732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20fa6108a3f1006ad8a7704ad8f0322f81ac5a7b6d4bd9e9c2c91ad6c5f23def. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-19T23:47:29Z), 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/QZTB72405733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8166982664f27dd69002ed956ae4f6bf9eb3840af80d488d9fe926566304b4. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZTB72405734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f8c7c51ce5b3ffb36ca8b4c7ebe6dbff98dac3c3137ebf0c54040c533ec025e. 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/QZTB72405735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98cb405b329504fdda0a1ed07b2c72c05ac71b2503ad6e4502f7eeb6d99489b2. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:09:05Z), 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/QZTB72405736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9842293bf63cb9839064b1ab0b940e147caedfe709110ecea2738ad960ba2d. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QZTB72405737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47438fa08855dd53840e0fc1bd7d8c3402907561748839b76c6e6f0cdfea0e0d. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:26:25Z), 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/QZTB72405738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6565f34e58a2b44ed04b4c4ae1b2b57ea7188e7bf80b916bbf720023b0d2def3. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:30:07Z), 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/QZTB72405739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde94f2ba2d3e4fe0a9304a199bf28cffff2459990725cd1e8a6a1e668860ebd. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZTB72405740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa910b60a4ece98e694b7f124cb4e2da273d366f8539ebde1209bca3f39dd7e6a. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T04:58:56Z), 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/QZTB72405741.