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 0x9e84bd0b769dd305cecf336fe41c2b74eea1acf047f85fa60e840b7ad5035a04. 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/f449e38c-2279-4e5e-8152-13f86a60342e.json and https://artists.proofprofile.net/proofs/artist/f449e38c-2279-4e5e-8152-13f86a60342e.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 0xa055f90f4dd083062864176069a87d9eb586e3b23d52131b69521c43ca385c83. 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/GBKPL2099310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce19ec6d2ac232c35ffb40310787e2ba92d292bc76ec3e71e3daed9709dbb15. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLF712200338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f374c9a184766b72de39eb4bf3aa7d9512dc4091be6288657a0985ca5a97e73. 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/QZTB62327632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b2ca33148e3e3e6e27ec4cff0961c2055701ff1928906bbf96ec84d59e20b1. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/CA5KR2460535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b623af3f1a897f1c38d5096c9dbc7ec9fb7012d38c520237f0c7e1dd811fc80. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:40:14Z), 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/QZHN62462068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f5e3e7dde799484afa626f7fde033c80a9515ac79a7fa3d72b4af1778b07de. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZDA82467234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd334775bb7b759f12fb80d7ba22858335cea598f7a8db4dfef335d497b063a4. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T15:10:30Z), 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/GBTDG1302754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1d2a9c1e6db8e4bc0cec9772dc6df639a9e47ef42e06cf94650b42f301f1b0. 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/QZRP52376238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8098f5e6c0950852304d1d7ae8d490f0b370983fe4589d18194efbc939010a. 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/CA5KR2363590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ecb4f6c2d7eee655b6235d7d323bb6028e05c0f1007cbc50714c61386d1f1a6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLRD52273728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ac772571a18aa0813955b46d850e8046939faa307c9861004e444d3fd8dd41. 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/NLRD52273767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b5abcb2e13b4a7524c98a4da63d91a6ac301befb9c3b81fe35e60bd4ac1404. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLRD52273768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b379a4bcb7fa3035cd76b31d20138ab34f73452d597ceffe16e2fc826209a2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLRD52273756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b379a4bcb7fa3035cd76b31d20138ab34f73452d597ceffe16e2fc826209a2. 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/NLRD52273756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ecb4f6c2d7eee655b6235d7d323bb6028e05c0f1007cbc50714c61386d1f1a6. 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/NLRD52273728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030c62df69298c749b868aafd9a48deb15d88a0d896899683ecfaeea3c4cd515. 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/QM3DF2202669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2195b693a327a9ae1acffe71d1ab0987a0e91b1fa7c186030cf00db420c3b96. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZQAY2326380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e913921b7635338d30f253fb1bd9a7f51861cb3a296d156ba0027f207641e0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZQAY2351508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c2bd8ff9ba2b3b6d447c1dbf2e0eb84dc4add4c4180401a20d433954bb7df5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZQAY2391200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c2bd8ff9ba2b3b6d447c1dbf2e0eb84dc4add4c4180401a20d433954bb7df5. 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/QZQAY2391200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc14d5aca3fbc764e0b5f2f30c54fb4aee3df3f5285be8511dc6f84f992e4d1. 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/CA5KR2325423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c8fff9166f4f16274719f12cb793d608acd0aa3451e2265d6310507628187f. 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/CA5KR2310881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34b1e9da0b7573bd81e9acd71134154936f1fff6f4bf7ea8a305e0ce85b4787. 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/CA5KR2289288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f05cbe3f8f032e6dd6c254ce2f3530256b9a1dc17a83a6cde54d86816622a6. 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/CA5KR2267080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeccf697ccbaea2c4564f650ae6a4f57e1bb0e1db967b8f72b3d3414b626ab3c2. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NLZ542200691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d38caa73118f66fd51855f2797375c5bf840cb7cea81e210e7e87cab8d541a4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CA5KR0013991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25689f76277bf002d76b856c57fc072650790c7f4cef886f01e705103dce17c7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CA5KR2191924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb153c1a25701c6348ce29624f2f66149636584b11f122cad775125c0a669a31. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T01:01:38Z), 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/CA5KR2210370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555f0a29f317fd2ea1e2f677cb0a02bc00d6dd943b38548416590166729392f0. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CA5KR0005764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a1585f2feb2df7a0542f92ee1cc13acf4b93269d555ab5c8e9b2a0cf73c3ef. 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/CA5KR2195279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25689f76277bf002d76b856c57fc072650790c7f4cef886f01e705103dce17c7. 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/CA5KR2191924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f68da0693bf69fb6c2803ec6c3210a170236da87da74a7d9405d5e991e80ab. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ZZOPM2104460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb234dc5bb423bd7e825f2fade1222278cd388d83a9d61c76b4c0793eeff2840b. 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/USA2P2008695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee27cb5e5396e493f9462929d80176861c523244fa8a9a3f7a5b5f617b315bb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBKPL2084723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9321b7ce31475bfa2ed77c96459352d50832028539b24d83d928a1b29cc8eb3a. 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/USA2P1961402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa629cabb27a354b1833d3ac794fb06d61c985161d823585045a6baccb06574. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBKPL2086542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b4b0071b43f278dde06c8a16b288adf3b209e59658e44308355ad69f1d5870. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBKPL1781104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da0d953138ae773951e68416d25e16c1b518b926627ad88ea1ef4b0b5802b07. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USA2P1936168.