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 0x583d23279399cbeb9a533850546a612cf403d68dfa4b273f380f8e952c3b7933. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/74597af5-31b7-44d4-b696-d91c7b1ef097.json and https://artists.proofprofile.net/proofs/artist/74597af5-31b7-44d4-b696-d91c7b1ef097.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 0x28937f7b36827d73e396ed7c19efc4889434103763540d6643dd82c41b439249. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/CASD10500992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a564b07f48b0cf5252474fb6f1892a7267ebbb14e950ebc5255682c36f3cb4d. 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/CASD10500993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1758632f4876c216f4db45be7160b8c696befef05c92f3ca359869ea5efd527c. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/CASD10500994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda438b816f9cc2b9e2890f88e5fa73782739a1ed75ec7b7a86c3f72085ef271. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/CASD10500995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31be1f268d659a54ac3d61a16afb043ec659212bcf6cd43e720ccc3295d6a403. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CASD10500996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1be01fe8a7457836a3dcb6fd08906124e07d32b6436949edd9403d9f33e65e. 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/CASD10500997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238120b8dbd4aa31bb67263d90e1688cf6997bb6b379994b8c26a552e8cbe9a1. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CASD10501005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aec9442eeafab133a94d0a75f172a22273d7bd2dc3d79c76c10d1fa69f15055. 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/CASD10602646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306332aadc74ebe6256afa30d08db35f13ac844cc37651f5ecd73c7805099f22. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/CASD10602647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f86b3a836bf1cd7f6edefa9217c52c8c015a4c5636deed0ecf47fe8aad5e6de. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/CASD10602648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb109579b65c4ff3328e22c9f81558f8a84507a5864185250c9933dedbe8272. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:44:21Z), 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/CASD10602649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0040c6f2d815b471aba8203ff106183e8940357cb341382af933506a81f1cc2. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/CASD10602650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2986468c942292fe7c196da1dac75d339733621a738d210c5a1f36f03ebacce3. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/CASD10602651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50d4d5d2911dc0745c933bb4b05b4c53c3cad47a05626a2a76223edd9fe7d95. 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/CASD10602652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec0297bcf21088a43ab4aab6a681c74e0a1f7b2b83fe69d755ec0e1a7df5d79. 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/CASD10602654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e264d013596ad6ac95d9f8370900947eb8341fb07f76ab9c6a4ab22cab9361. 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/CASD10602655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49fa664ee548dc1e19f75c7089fda3a1495662b9d60573b9b76aef2107a2d4f7. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/CASD10602657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfff6cc46caf9ceda833a5ef800380ee5093298a03349c43f5e948b200241593. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/CASD10602658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1722c8b1b7922ca507a5b011651a37862c760853878ce40a7fa2233826f3b6. 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/CASD10606975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3393c6d125113161be6d89de71aedb9e257654595d9cdcef6d57af6786635808. 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/CASD10608541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d4a07ff1feab6b290f49559b40a66360c3bcc058745e6cfa493224881c513b. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T10:29:43Z), 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/CASD10608545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25807eabc8e9710ac7a55a5fd709fe11ee5c2b63a0230912417d535936c5f982. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:34:11Z), 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/CASD10608546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1164ef7410d5e6bf2c284407355361c6cea6a1a662a85630c896f73c4f96d3. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/CASD10608548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a7fdc22caac4d3d15c11d09123cb5d1e9edefa4c4d2dc5fa3210178223aa8a. 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/CASD10608549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7061ae8073611d09f1f2adf4bd8e4a141493f35971e602a97a3dc4d7e2743af. 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/CASD10608550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5da8894038697f2f500892cfea0c12c9fead1bf601ab40d211bc43e3b993155. 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/CASD10608552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97c7beb6ed8399b70607747f75b78ad7d8652408ef667f4d71388431e85146b. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/CASD10610454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ccecc859d379fb53bb9b008267a67607681a52dfb1487b69a0439ff5260116. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/CASD10610458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a902ba71771d93cd00923db7a529bfb778f8cc3422a89305a1c3e5e64efc96. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/CASD10501036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fec57ec68efa9cef3270abcb6c3cb70fb2fcfa40e2d95efc108b95b63f61682. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/CASD10501037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b464d564da25d20c2b5cefcb89e288798a331ebc12ded005977ff29c26b466. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/CASD10501038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a5560b959eff6f90cb192dd64453a8be97c00bb01e86ed9f1709acbff32f3b. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/CASD10501039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01007726dc23a7891e2a6d1be6c6d82f4bba624ba7af746be4ac8964c290500f. 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/CASD10501040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e557affb9640e73e7c0d218e90942d5d8fc280c2f4c154d0d0604542e7568b. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/CASD10501041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ebc452beaf7ccbbf0e0e3a0b5613e28f2481465e0eeb8a96968a890100ae453. 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/CASD10501042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0dbc08a3a49f58711f66319fca58933e8b22410c25ee013f9cc7ad49539aa1. 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/CASD10501044.