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 0xce065cf1585c19c186fa65f510dc69ef4134440131668423256df9fad1937756. 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/7346650a-5a3f-4cf1-9c88-7ca17a317fee.json and https://artists.proofprofile.net/proofs/artist/7346650a-5a3f-4cf1-9c88-7ca17a317fee.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 0x6c58e2d6a2ac354d2842915cba41e5c8a26a1dc5ed2305a285482bf954a10b74. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T12:45:27Z), 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/QMANG2249469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc055ad3f1adefca668f096e41cb9b02eee440cb1f6cc407ca08ee04ec5616f07. 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/QMANG2249470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd115184ce73eb20f8e218b633cdf4f79f4493f18475c84545cc529a33e9c34ef. 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/QMANG2249468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629d4293253ffea082b86fd609dc94e10ec3d52655f549f8d50a9b2453a35a17. Chain 2 (Bitcoin): anchored in block 958496 (2026-07-18T04:43:53Z), 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/US3DF2431561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d369d259a0aa60a0efb44984bd16850f0f14d5ec552713585326f9d73b4914. 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/DGA0P2402921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8cf31aad4c63aa2b4e4ff2bb56d1588694ee9c034aeb33433994de55204b538. 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/DGA0P2402922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5933784a6d21cc872fa768f180e39f3ed0daa786fa557699f40d8f69d9d1e954. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/UKZGC2408110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x868207ee61d13e789d6ef49566bc6ffaedb75e31317cfba0f383629dafb35beb. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QMDA62488286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478c5f13d8538c0df69c7869f98e167196d701b18796b75bc9fdce2b3f386276. 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/QMDA72419025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0fd5b13043dfa4baba0997552ed8664257974eb5b05580adb5e2e9e55e8c9a. 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/CA5KR2496225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd284806d090be45fc71b4348b4205bbc16ce46b59070241aee3bf7065cd4f6. 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/GBLV62406699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627e431fc53cbbba370cc6bba1b1a714d63c6ce4ffd63701495726ab375b89e2. 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/NL3M12407371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba3a61144bb2fe477e95521617d35eaa02a078affcfeb76af785be4237fdc19. 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/NL3M12407372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4796485e3c891c080a0b7ea5c54b746eb9c53d1fe439b496ac5e573b10245ba4. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/NL3M12407373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1776498ed4c2c9967393d45739978bb34a7b9d99465304ba2c75d51f8fe22e3. 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/QMFMF2446354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199d57ae2431f63a768df648ef7a3e55205f32557b7a65047076f6e2c17eb553. 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/NL3M12407388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc002072c287aa43a6a3c8244865146591e39629b868c56a6ccd3f2aea5633f07. 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/NL3M12407389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96af94b2e4b63b6046610d4edcf7153d2779cc7e1722257a6045f027f7025e9b. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/QZFYY2562440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d7c08c9d9f58cd5c225952b359e353c03fc6051c1bb79c7b118e682283d9da6. 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/QZFYY2562442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaebb6fb9d8d995d6d5d10e080b72423b6b61f832eea107cf82e239697c31da62. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/CA5KR2509935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x103d42ff88f325972a935ec5eecf823dbbbec0c5bb40ccf92a93dbb73b16c86e. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/CA5KR2509951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04556f28870c1049329154bf91f61af672abdb2295643c43cb7b2be9bafbfe16. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/AUMEV2533914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db62b1f5eb7424cf427c38ff0ca9fd1e3eb573973200b6c7d59f3a19d9fcacd. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/AUMEV2533915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec6dfdbeee180056bf8d33330ee9dc871e30d0d07b117e3fe9e88fa4699d991. 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/AUMEV2533916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d5c7e6b1af821a466cb3a605b55f6d86821988a162e8ac8b2900e883da289e. 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/US3DF2542292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x180d8e31ba8ae3d323a01bf64957ac5ed766ec978b4fec666c89996b9dc53789. 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/US3DF2546773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698520c957275015ab1e5ae8d560c73866961771fc3aac2a14580e411a84652b. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/SGW502561467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493717adf7988f0e9bd47db32122817d7f12539abbd0b0ca528b7badf4573a0d. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/US3DF2546903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6679873a9cbb2e13881d917ca03f12eef1640d4ea3a38912115311384e947f66. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/US3DF2546905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x106a11dd7d07e773683216397a4fd4a729e4572d7d60564053151c85f3283047. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/US3DF2546902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80d44ce837655e4e33fdbe8ee1ef54f1e58977869b06601ffb13c5687b80af7. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T05:43:55Z), 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/AEA3A2595113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80d44ce837655e4e33fdbe8ee1ef54f1e58977869b06601ffb13c5687b80af7. 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/AEA3A2595113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc157110d71c5320f4b3d69540f0415207c7c7587bf1bb23dfbb5431a27936627. 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/CA5KR2536572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a73325fc01c235fa7cf39da2bb18273d9e37d36b3eba8f79e170e4ff8823ecb. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/FRX452559264.