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 0xcb0f0229427bd4942949d496517098189149ce5683e6417f408482cb3aa65568. 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/ab803118-9170-4bd0-bbbc-a75191ab957e.json and https://artists.proofprofile.net/proofs/artist/ab803118-9170-4bd0-bbbc-a75191ab957e.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 0xf463a44f95bb3fab6a14681f9d48d7f591e64279eef4b8cf5084a2d279e98f30. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BXKG22400654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d5c881652bdd5aab7509d72c728c92164f5b7cc811660f2b5d83e28f787232c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BXKG22400829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fce46003e20e2682549cda3265efd78dc32c4968daf5982ba4d17882ee2cb59. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BXKG22300757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4149f601179a694c07982ae5a0579daff9a7a488e0e7847ffc192636b632516. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BKDFK2400220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb456374f6c8baefaa1fd628060164ec148e0f578afee1c6ff13662826a2c6307. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/BXKG22401192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3fc4bc47e9b0e73b2c4a952170bc4e93ef72f7b295a9d28cdcf4703463f7388. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BXKG22400610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe126c8f9dd93e105c88409ea1764c9382f39fe2528c1f168b19f993f9dce1cad. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXKG22400543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093f3a24f2a107b9c9693f5d811f38184094c45f4caff92f803e1313c1c74619. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BKDFK2400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109d668441811a95fc4145a716e7db42fac7ebd88d6222365212607c922b42b6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BXKG22400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b765b7bd2a5bbf43979bbff777b152f7e6f2efd76891286e3224a8a41c5c74. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZW9L2397787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916044dfdf5df47061bf435712360fbdf846b8100685848692d0b8922fc08f2c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZW9L2397695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898bd0e9541670fa6a5dc6978f4b998c8bd3161afbbf9dc9e30725a6887ec51f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZW9L2397850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185120fd7d10eeb084e5ed07fd83792e4f34ea10d495a4e7672d38616ef781ab. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BXKG22302556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72701a9f0e773a5b52f735d84d799966e11316a5a0f2cab26309ebac6735d60a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BXKG22302374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db55d3a2b841abde4e331c9b5a45a63371e46ec3fa89acf2a72ba9f93c1e34c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BXKG22302401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c84ba1a731928a0d5245480c18c750d41a078c8b596ae412f451701b3e80cb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNJZ2378257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x474213dc287552c1d63ec020846e81b15dfbdbf88dbf81f554aa8fe2e62214d2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BRWMB2301290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e293bb3aca81a2937ddb4e23157784dcc5366d5019bbcd9b81c024e66c10e3a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BXKG22301516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x773bb7024378ad670cbb1e97f0433e0c2781c88c3e467f7b5f5150391d2de5cd. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/BXKG22301515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d5ce801581dcd2e69baea8c5c84237b71e0fbce7474bf0f3af22cccde9963e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BXKG22301253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf8524ef5c5bed88be7f68b4cbc4dcb38960c08eca9e073c1a8aa434fdd4331. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BXKG22301252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6db7209ff788cd1ff0534748045312634ff8b47f89cc65245ff36d9ea75e1a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNJW2320831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a0cfe638aa414be8bf7b8926adcebd8aeb13d8932d9f2f9afb7180fa14a5b4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRWMB2300981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ea0c7814d5062de675382d0182042841db01b5a849b8d96dac469ddbb4223b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BXKG22300503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b046c0e356ca4cf4f49409c1820dc9f2cfa0009d95c7aefe320ff158918fc50. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BXKG22300386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3af6d59833ce0ae7ae837896cd46bc9211db4969d87ab62bdc623e646ea0b31. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BXKG22201433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5499f10d56e0ee27095d6c6f0b451b35f60a16c96e45c6ee7dedbbd6c2ae905. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BXKG22401815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1dcfa467e52b6357948c7f88713f42e2aab83e2477b704340ee1a58589668e. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:01:37Z), 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/BKDFK2400413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0b5add50968e7a693990e867676f9060a8ff88d62494afe12d5453f711222e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BKDFK2400416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0797606515afc8d514aa508d4b878a2bd2cd0d084de917abc75dbb8bb60b37. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BKVXS2400236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x144c68958881cd410e965d24e4bcdd30537d42f8e0741368f2738e081edc717c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BKVXS2400233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa687fee0baf10bf78f282cd992262e115c69621f3c7b4052c3ff48afef2b2c85. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BKVXS2400291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf54d3d97cf4ffa486e646d99e1f8fa6f431805482edf03461f9caf55b142c4. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/BKVXS2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b50c7634cd0edc570258305f3b7e6cd09de67533761f9a6c91004e0f1c51e34. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BKDFK2400262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19cc06abf870168ea659950a48104d617da2613edc0830c4fdad17e7021a398. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BXKG22401378.