Navicula is a genus of boat-shaped diatom (single-celled photosynthetic organisms), comprising over 1,200 species, though many Navicula species likely do not belong in the genus strictly speaking. Nav
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 0x72caa073465931f9ebad481cee36f85d3c4e04f64350c4562d1a48a60901b217. 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/a191418b-3c2f-471e-b47b-068329711671.json and https://artists.proofprofile.net/proofs/artist/a191418b-3c2f-471e-b47b-068329711671.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 0x08a7fecf941a203b9dd80ebc0edaadb8da40a689e54e55e4b818b45ad19533cd. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/IDAC52005068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c80562250a7946187f41d794dcee38f5267608df47d9795776ca585aec7d5f1. 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/IDAC52005070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6423cd3dda32695e71f3e88bf9966f04d08e1e7c80b33680a743fd204b31211b. 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/USHM21304691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9d34701fc9cc57ee5fc6ab2c43d60e5746f8b8287bd4d212101a038dbda1fa. 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/USHM21304693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8438dc70f2a9f99ade6e65bddcbda2411ef76971e40870cb9217e139a2f83c. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/USHM21023836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7734fec965e2697caac4430ae3b2a186eccd3f8462f8f5c02548de8749ca0a2. 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/USHM21023840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa150898fc403bbe268b84335cafd7db4b941e6e224b8befa2b37bddc8c0970a2. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/USHM21023841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fdff410935e9c95b48c0f608d32c340f073a960596b9ff80a7f861ea8cc5f4b. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/USX9P1364553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57db216a589bbb5b3d9d70e15b4aa37e13ada108274565d00284cdc5d95b87e4. 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/USX9P1364555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49826096d0a0c3933df20649e24ffab1af5dfa685589e23f43a76be9bb3b8ac. 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/USX9P1364564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279f0c9282cae87b898de2a921ef9e2b260438f3e5f9173fea5c3cce13525559. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/USX9P1364566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006321e0559f13e3412359f8dafa341fbe297aaafa3188b46360e364b768e477. 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/GBKPL1790516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef54c16ef772ae0c65bc4ed2558e364859a5e49427d7698d62b6a489055b71c8. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/GBKPL1790517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ccf3fd847cfc44e35073cf6aa7f7d58522597a272ebf9740d3b23b204a2ac6b. 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/GBKPL1790518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b466ceb64f126a9e2c1e81b5f0055fe04fa4fe77ce5eb0df89c959215cbf94. 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/GBKPL1790519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b7b366343daf6e574e7a5827d331f7aa527a5cc3482bf8120ab8fdb2516e858. 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/GBKPL1790520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714d0489d739a5f10268c9fd6f6c7fdce1e19c326fb16b3ffe72edcd2c211ef8. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/GBKPL1790522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3740a077f6e539ec1a1a4aea613b913714425e56009a9938e8e4f7d6259aef. 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/GBKPL1823594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3b55c41607ef859d4cad91610668489fbe3c6f11b0bd3ae0aebe5c27641821. 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/GBKPL1823595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1a4865ca0479056c5c8701e551129b4780e3e6dd4bb4fb62eb45a078bf116a. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/GBKPL1823596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa827fd9e199b2b253aa91296f0bcd830352db12697e7513afd4e5ab742e1b65d. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/GBKPL1823591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf67995cb62b6f51c7705dd7a8b231b9bdf598b76c9a07c0591231a5a342ea28. 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/TCAFH2056877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ebc02051ba0b534f37b50d250070a863e4738faa6a5d14010a30334ab6f5daf. 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/TCAFH2056923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38eb5cca06e064907fbe57c0901ca144ea3b020bdf01c19bc1c6d665f1f54ca5. 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/GBKPL2169909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bdf524451dd2fd8d9ab287a76b55818b204350f9879c6a0a4d56e2ebba973e9. 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/FR96X2250018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5261a1f373aab36be45129687229ade0a07dd1af560f08bdbe16b85ebcef05c5. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/FR96X2250019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010d4409e4193d86cfcb9f6e1dccc81c8911bc72435c90f5b75aaf71b24c82a3. 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/FR96X2250020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946efba7d37d9b94c14fe7d19bdb12800f37752d372090a3bfcc45c9cc5e0bcc. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/FR96X2250023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3405266ce24122a33232ecdd5cb85c596728d9984bd4fed1fb7d9430f673ebac. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/USX9P2368293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e01ede8b7ff05dc798cba2a77ea276c30905b0196f059b89d53a059f4d799e. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/ARC572402680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2007601ad09f81d092368d10ddfda9ec5c6f1e3f6043dcb8912c6220c9afd475. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/NL8RL2460364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a35e35a12044d175a4253a9cd9ba4fc17ea7988ff00985ae8d9975c8abca0b. 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/NL8RL2508493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3443412cf0a80b9568b0774eef039efffb61a8bee9a073445c9b1ca434d9f3c. 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/NL8RL2511796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6283875477c30a59010fe058e95f796a3ec9afa9fca64b92378d4c79311120ee. 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/NL8RL2555600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3771d73c74c8c65e87d991dd6b5d0657233ba7ed04bc4b128cd6dd3aa0fb526. 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/USL4R2306857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe79ee3f993043a8e4cf748180d4ab2401f54814ce8e693f1adea88c32dbf9594. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FR96X1917670.