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 0xbcc448c27da4bb44dadefc2ae95c0a6fec83226edcc4d341f92206a1d5f8227c. 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/93ecd256-b741-4032-91c0-2e40a592ab2a.json and https://artists.proofprofile.net/proofs/artist/93ecd256-b741-4032-91c0-2e40a592ab2a.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 0xe8a560e3231fa3f480626b2e9c332bc5111277d19b8b6af164aa42142c6fb99e. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:25:40Z), 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/QZFZ32520677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa487c150a9ddda7b3e2c74e9329c0352cc03a564eb104788bd336cc2976751be. 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/QZFZ42510875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e9adf9b91bd0bb63f7ce406bd3927f10cdc636713f79a91703a70e106e6a06. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZFZ32524557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750c3fa9753fe0f72e0b2cf686c4adaba0e9613c076fbe426c9f8e6a4842ab4c. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZFZ42572324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ef1c46c286c131ae6a1a50c538ae5895f8d003b5533a4c75153317b9da3563. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZFZ42572326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7082190bcf9474ea14c488f45c92b613d24780fc1782d8adb69ad2e567cc2625. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZFZ42572325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc8b37389cd1331b7c9671069b98b52f4c2a9692c4271c551a09c55eb5c18a8. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZFZ42570259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61586bbf16046dd23b8bba761ec8e8ae3a5194fb31251eb529896929be532c47. Chain 2 (Bitcoin): anchored in block 958351 (2026-07-17T02:38:05Z), 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/QZFZ62543492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355034ce1c6537f64203992834cb4ba36270002b42b1b82534245ce954e9bdad. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZFZ62543500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75f724e4ff7b65da3ca3a5b2876c898a0df43712cacf0f12a3d7aacbe0a592e. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZFZ62541489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2cf3a601c8fa3393e84198d25e211a58774efc4c8da3bb059f3831a670be24. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZFZ62543501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a449fb11bd992373c7118f6634e730209af07108e7019825816dcec968099fe. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZFZ62545277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe764cbbd2ef7d8480468e2d2cb9e0068b85406e5e4c3bbea9cfb8e2926b4ec75. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZFZ72534878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3fb779c770a0c1f4dc39d4c79c6f8a6746bef6e419622777ee5d15b0a52dc22. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZDA52551934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680a7ac9be43ed0988b60e8c8ef6647dcecb2dd1abe1f5be8a70dc25f4b1c486. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZDA52550430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72d017bd59f9af60e7b628e0f554140f6cce61ef8192a024b89af3192c99e96. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZDA52548525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a7b62143b72f93fcabb38eed2dee7a530516b52c534c387a3a92b157fedefb. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZDA52594387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aab0bdcfce9564348b1de4ed41683b72b4e7ed87d7cf8233f51afb4c3113552. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZDA52595810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2023b181162c792d3909fa0e49dd8312b2c1935182a8fe8cabd39076b9fcdcbb. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZDA72555336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe2fbb45c2d429f5d9c70321b40106044f78376b36ffc0db3ebc31ae16055b9. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/QZDA72555340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c89f70f428f91e7d5ed4e5db44b5c54dfcd387dfbbfb8e18f1a70b818f15738. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZDA72555343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8791c5c6d64333a34f079fb298fcbac41c5acf398771c1ae9ac5a08152a6c64f. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZDA72555332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679470bfa2737386e5be00d310ef1c9c42ce4bbce0424d460f56100db58dea36. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/QZDA72552946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3a717cbb89aab8eb62c3db3da96148bb165379aa6e8f660cfaed8b7567a4cd. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZDA82567714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b118c390ada9921698b83bda35379b436dcd5b3f5ce9493001a820fe8634eb0. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZDA82568076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4f033576102d6269dd96ab93b24871a7a5be457b83ed2fe700356f2fcf0738. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/QZDA82567769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c852d4c2c1dc3d24bc19ac5a076f37a915d5c99c87729e492df1f8bf1a24ca. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZDA82569718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53be95acc6162da48b156bfa00a202a1518567c5bdf45914ceef52b1d228984. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZDA82567942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c8b8102d0d58cef22a140af0e217a06cbc9d16bb0582648237049d4dca2be8. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZES52587884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b51a0ffa212982020ddfbad3bbf42f47df07186966e59f42b4754e4f42151b. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZES52587883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293e016f7183b920eb744fca1968a7051c1d4b178594a740b99843505146995b. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:06:37Z), 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/QZWFE2553597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea57dbd978ff17189e2bd8cf29637c5054a9a79432289c7d140ea5528f15c36f. 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/QZWFK2544000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a30d85bb37a76ca387841fab8df66e06d504ce0d8a7f439504973319cfcdeb1. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZWFK2541193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x407222a4a30b5c3d9471b8b8fe65cf98da942f5b607ca102f1af6ebab0a6192d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZWFK2584611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc258db11be2bdd212b3c18365dca51f88c745f7948a3220a89eec6f771411c05. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZWFK2584614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac93657645206d1c36af3fbd98aa02d19acc1d2f111154a87100e35ed540cb2. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZWFM2513017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ff7a7c1b80fa4c4e1b933f2b2ccb46c298be6945e09a3bb65c1c7f711895db. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZWFU2508469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a98a5fab4ba996245edbd984acee2d7929c0c6cada2ba1b9ec42436bbde78fa. 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/QZWFU2508467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ca14ea530855c864b108ff14cf1fa9a9a32cea931a8b77100a9bad27ca0c63. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZWFU2508462.