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 0xb334dabf83b2b3aeb87bc39d1b533c906535dee4426a92aa30431c6e0a11d728. 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/b744e2cb-5a99-4d9c-8413-30ff2187a9b2.json and https://artists.proofprofile.net/proofs/artist/b744e2cb-5a99-4d9c-8413-30ff2187a9b2.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 0xad89ceb42947c0d7325a340f6be1b69f252931db779a436faf3384945b0c9b96. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/FR43D1601696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d8bce76cf00c8ee32f19c103624a960835ea459a7168b6540f058b862c921a. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/FR43D1705270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1528f140d11a8d6a6c1fbe686afd7bfa8aac86507a0f739265077f1515e50af. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FR8GV2262920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66afd49c2813a28d5d975ca145b6a9038d5adfd08830689132228de8a245335c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FR8GV2262930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b56c555212c2ff2ae04f6022ff4ff891878c55399a4c11ddb3788477566128. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR8GV2262940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414c34b089e238bcc991b2973e25dbf680708ac29d4b19ff672ac4db6a606104. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/FR8GV2262950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1871d7bd110065b7768dfcf3c799d1ae7be1daf902bb9d52245b80fcdef4c111. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/FR8GV2262960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd39434a90ebbdf78e167c0405bf8b7858cae2d6563bd3eede339f60220a0fc7. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FR43D1707550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd60a8cdd200db0fc73baf359a3fa09450f0e92c97339d08d7db9675be8a5c82. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/FRX872359911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ad9f6702903686ad4fad3f0e03c4ffea9360352aef797955649a4849317a78. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR29U0900350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x153dd760eb068e1095c9f9b6f2056893a70662ab03a2b477afbcf2ca54c99b2d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FR29U0900410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e30de1056382b16678be9728ffbe2a5a88321b938e9bb0ca69c152b11bea8a. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/DEBL60925918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c47dc29d721c40e4db6a203c941f83f58613e4cc3fe244376286a4ab885e411. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FR6V80075939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ff8e1126af20cee7cb778499d771a853046ecd3d4c277ce2bc42a454a25fa8. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/FR6V80075940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268dc2a60eed577167b90bae0eba9244dfc372c2e422b9acfefe8c77b0470274. 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/FRX281596591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab493a82a854570812672ce4d5d8f91a52612a82c5bcab0a8b21906deba996b. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/QM6N21583653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f788466a9de589fbe9a7db96b2a2f0de987d287c424f48acfb112c024c9243. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QM6N21583654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf721d510c31ba643a86d4ca04ff5c95812e40d174fede06967b4d7a66e5716fb. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QM6N21583666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372953917c01eae4e64e918f5185244ab2c59fd572dbb1897c46732bc15ec0e4. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QM6N21583667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd5f3b093c9cb49c72c2f2a0f0a8d8eb7fdf09dbc7fa4d7a792d230c51ae165. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QM6N21583669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380b5ebd5eb9b8111603c168c3d47cda9106ceb99fb852708b0b77afa15b0f5e. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QM6N21583671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9637f39460da2fda1bec52e75ae355ad53642b105592d2a159ba28a6ad149ece. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QM6N21583672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe56a2653ef8c34f0f012615d27b458092e7e9f7e6cffec78e284643b78fe991. 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/QM6N21583675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b547bc6b83f9205ceab47f96127fdb25f4cfb2faee975b5900f3bad588dfef. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM6N21583678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cbf0e74303aef394a0078e475e2e5d650009953b7536f324b751c1cf6293784. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QM6N21583679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x265f822a57c6e941308f03b1b0e8db65fa65b113a4b6df8a949389e3861a7f92. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QM6N21583681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a74189c3dc105fde6945d077159094578983ec7b6ca54c17da48798c9c669ee. 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/QM6N21583682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c0d63143a9fbceb36a34152052f03e91ca6871b5a6293bb690ffc97fe4c61e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QMFME1532149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd39434a90ebbdf78e167c0405bf8b7858cae2d6563bd3eede339f60220a0fc7. 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/FR43D1707550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6037ba408959fbab32990e1ae76f61dc17bd66fc122cb64a80d5841a3eda8b8e. 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/FR43D1718200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05adf15f70282ed57a93bdb05f7146e3fd73462476698c679e3a7aff78019aa3. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/FR43D1704090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a338bec5fe844cb9a194106cdfd03e2ad86b1d906f1d46da5e582210bc106b. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/FR43D1709320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cfbe7fd1f255cc647cac111b86aef0073ae7f30bf7cc3555f911e5d3a1679f7. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FR43D1709230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0439502ebb411cbfd03a176f281e639ec374a55af12cb1474be62945737dd7a. 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/EGA1K2301064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ad15dc83fec4b78712f76bb587ad73ae8900d2e47aedb3d5816a23563347f7. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FRX452524308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10b90b8475651782fda41daf092f4be781746c3dc54dc56d5f5a2d797fbc58b. 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/FR1S70800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94342514df3aa3b7cbb028f0eb183353827ed2da5ccafd87c67df02a35cdeb8. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FR8GV2426210.