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 0x19ee4f3b40f7269a074b42579a616c6db4d73db846b338439281bfa4cc75c41b. Chain 2 (Bitcoin): anchored in block 954623 (2026-06-20T23:40:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb8f4f15-f73d-4687-9d8f-11b4243f3895.json and https://artists.proofprofile.net/proofs/artist/cb8f4f15-f73d-4687-9d8f-11b4243f3895.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 0x7d81dba7475d2c40893168935879f8e9d2ade448b6c2bcbe672209ed3a6fbb2b. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZTB92510117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb89fb108c9e61cc042b9fed55cdf9d29a89fdb07d77aff1217a860b66d9509b2. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZTB92510118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3cffd603a6ae059f8dae9a4a50a0ca3411dbd7e2c22954346b068fb4166f0d. 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/QZTB92510119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e05d14f4f298e09ecd67c07d59167f6c5982564213a38684afd8ead064523b6. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZTB92510120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbeecb7935e7d09aa09c6a269e66e61b253b1739d7e827d8bf5b397d3ba5817c. 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/QZTB92510121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e66a60af9dd18a9378f3f4a2277cc1495bb329adb4da55765a081e4d08b0ab. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:55:22Z), 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/QZTB92510122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b2f4905e34a068ef35e30f94a6eb2d78a4cf4874790c031f8472acd5e80b5d. 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/QZTB92510123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34670e9bc144a44b6ff6940ed2dfb57d689c7047f34d4fa95f47f89c78329449. 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/QZTB92510124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45aca4ceeefe4ba14f151a8a85ac7e7b052cc2bd315933e35cadc77d401ed60d. 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/QZTB92510125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32622cea1bb048933b51a81bc08a8225d269db8b52d14385bc3b8bfddb640e08. Chain 2 (Bitcoin): anchored in block 958635 (2026-07-19T00:58:42Z), 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/QZTB92510126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb8540ed8bd3fb2a89ee69ac719efe996e7dd8a23ccd82bde5bea6637b51794. 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/QZTB92510127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a06ae4ed0440866150dcbbcf665517e5d4dede9810be5910be13193511da45. 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/QZTB92510128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69638e9ead0a9d6ef2fae61785db1ba60c6f37ff51eedd6635c727509c8fcef3. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZTB92510129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335b2fd16415a4ffba8b64ad4fb6a3b7073971581203a7c2a44ffcda51df6756. 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/QZTB92510130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb6c1aee73ec9f6fd3de11970ec16e1663a0d3d3096c76ad34f9ba0c8b68a817. 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/QZTB92510131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c2aea611580a2cb7679fb7737927cc7852e86cedff3967254c143120dc3392. 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/QZTB52503399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d09b010b906b163b6e81131d4d0c69e61423b41d871aea1752e1a5a79c5bc71. 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/QZTB52503400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd477e2137630ba61fb806b3b91d7812196bbbb4c57799d50ef5fcc6ce7a82f7d. 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/QZTB52503401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf3124a7666534c05106032f07226ddba52783203d3825bb04955a7c1901360. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZTB92507623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276d65aad3cd2105563fb4a65af9b92a06ccafab052554d7d7cd0eb9b967c6fa. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:05:17Z), 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/QZTB92507624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cbba02055b3a7e6c8d4124eede292625fe7f8bd000e22d1397397e3269db0e2. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/QZTB92507625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb84c85bdcb76b8e3443a17aedc7d3ea5d0594d2606568ee1739934a1ab1f0d6. 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/QZTB92507626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5197cbbedc4f4cee3c63c91a3a5c8b3bd6efbba7126cd6c264df7145f571a4. 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/QZTB92507627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea33a7a2d61b421c91fee435ed9678eed367232d7933cbe4c8c99434e3e86e9b. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZTB92507628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa12491678560f851b32aaeceda07e9973bbb1103d89b3b6ed61266955ea17195. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:56:37Z), 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/QZTB92507629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9727c99029b4392712c4f3a9475f1e60936cb40e7b97a41396f88f8f2e0a372c. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:49:55Z), 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/QZTB92507630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa242588ae6ed5b57e4eca0c20c09ae992827ed04105680e62515bce2a4d23808. 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/QZTB92507632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cdb7e856571d2f62c2b7c1363b50bb049684decb694a95e8df1f22528d891b1. 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/QZTB92507633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80a6fbe68411c82250c31fe2c7813a7dc1a96e2fb08a1a3b0cb339f6cf307a6. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZTB92507634.