In his Systema Naturae of 1758, Carl Linnaeus divided the Order Primates within Mammalia into four genera: Homo, Simia, Lemur, and Vespertilio. His Vespertilio included all bats, and has since been mo
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 0x6e768a0d8e36e2451972d3a5bb0520ce746e67c1908dc98d6624193edae93958. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3413053b-b9ce-492c-bbdc-f7ea28a89b46.json and https://artists.proofprofile.net/proofs/artist/3413053b-b9ce-492c-bbdc-f7ea28a89b46.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 0xd594b413bd3cf8bd8be8cb91d5cb8e422b533c2e1e867bcf6effc42dd47a99b3. 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/FRUM72302441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3490220f36a729658e0f916e9be7efcbd5b9ec0581eac30cc9b2d204d3e739c5. 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/FRUM72302434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68d7a61a99d743e81d7d806ec1e132164543f82f68200c2b4910cc3c891c354. 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/FRUM72302440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe403d2f99a501bf154c74d658951495f0df7ae46d6e16713af59381cb031f7ec. 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/FRUM72302174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797e7bca2cb6ffca24547be32ce186283061e7ae02c9e9e75c20ab5ca7516e53. 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/FRUM72302442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e897dbd1016656920b7986a038e10a8bb9fee1a1b675aaad3378ece98e5d1c. 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/FRUM72302443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a04b45f30e4ddc1cb6addeacb05ae42754eae1c7eeab9a66515ba5a1cf230d9. 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/FRUM72302444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x009b8c1f50c2c4d27622ff0846acb44fc7d58a434a4c72f68d1a75e58907e512. 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/FRUM72300595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6d152631ccd59a27f1f573380f3532f96c46974009d69c3b16403ce34ad2a6. 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/FRUM72301214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a4c15412c8b1904cc5b2ef7cd7bca394386e9660fa4c3ef185e2407da1532d. 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/FRUM72302446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36cb45669918f71b5a71aa25d40baab12a4b1763493d22b6f1265ee8897eafad. 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/FRUM72302448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9eafcc9183004cafae33ce0062798ac4adec0df819bc76bd039230b6a4fe3a. 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/FRUM72302445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1192474910e4c994efd7646565cf1b3e833807d12cb3196491caaa2fd6b15b5. 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/FRUM72301441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06077b07eec69f624e28fec9216fda97f5d69d3ea328df93aa017f9af18ebebc. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/QZ8LD1984709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e6f0ea521f74b07827982e356bcf419024721f22f8b0f79319026f4d28ed15b. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/FR9W11916468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9806cee1ed3de9e507fe2afdb099de502c3f780e7d25ad3953810d9910ff8380. 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/FR9W11909142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9483b7c182fd3cd50f8988c68391d599b833b43d39f92e968318f2d8543b0295. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/FR9W11916471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12268c606442613890023ea061129b5229007997dcb0e316a8c1862deab91a9c. 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/FR9W11916472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb93ac57b06e48bdb94386741d29d507a37b847f90cc5f64720f02352276fdb2. 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/FR9W11916473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2a809689893b8e7fcc0f643bf396a5cb0edf92fc1bc5402b167d92d67fa599. 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/FR9W12432171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x630db3632077948b84611532749bc8ac8ee5d39c61b1fb598c70c7ec3b8d4cc5. 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/FR9W12432138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31007f80dccd96d622ab9bd4b329ae1cd451457fb6ae15a57950cffed1731d83. 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/FR9W12432172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3490220f36a729658e0f916e9be7efcbd5b9ec0581eac30cc9b2d204d3e739c5. 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/FRUM72302434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe403d2f99a501bf154c74d658951495f0df7ae46d6e16713af59381cb031f7ec. 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/FRUM72302174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6d152631ccd59a27f1f573380f3532f96c46974009d69c3b16403ce34ad2a6. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/FRUM72301214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x009b8c1f50c2c4d27622ff0846acb44fc7d58a434a4c72f68d1a75e58907e512. 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/FRUM72300595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b622f617238bcd77d17c66140e5d4653f5e3b40148914d5566eb35fe62b78e8. 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/FRUM72202281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd427e60af7a21da8340dd39f494199d719e44a5aef8653e4c01d6fafed706ace. 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/FRUM72200644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1f482bc52a442898d45647073fe2350f7461c8703d2eca61ec2f8c00c1cbcd. 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/FRUM72201024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4fdc65ba642a15f95b34ed270a6924bc1ce94938400573ccc3cd472df40b041. 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/FRUM72201023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a84d04268111c4b7a41ef7571c0c7c6f4d4c2eba326dc762f10680f66c2f245. 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/FRUM72201021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c85b954244a805b4499336d7147efab9e2843fc9ffdc53339a4c3673c3759c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FRUM72201025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d1f66eb76348d2cae0dd2a600607fdb6a8d111e1fcc56982fd51c317bc331b. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/FRUM72201022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a84d04268111c4b7a41ef7571c0c7c6f4d4c2eba326dc762f10680f66c2f245. 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/FRUM72201021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd427e60af7a21da8340dd39f494199d719e44a5aef8653e4c01d6fafed706ace. 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/FRUM72200644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x011f1b006070b0abed4350e5207c9c110bad9f6787a2c45843ffd94935aeaa29. 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/FR9W12004555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9806cee1ed3de9e507fe2afdb099de502c3f780e7d25ad3953810d9910ff8380. 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/FR9W11909142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06077b07eec69f624e28fec9216fda97f5d69d3ea328df93aa017f9af18ebebc. 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/QZ8LD1984709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ba44f91d3dca2374a912b6407bb480156451d03368d37a00b6fd0e8bff7b6c. 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/QM4DW1847316.