SESH (Social Entrepreneurship to Spur Health; Chinese: 赛思项目) is a partnership between Southern Medical University Dermatology Hospital and the University of North Carolina Project-China that uses crow
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 0xa66991b6aa20cba7b80a5957cfc603a625dedb94e32bd999c09c47866a6ef705. 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/b70a2b96-fab3-4868-ad7a-d3f5797cc9b1.json and https://artists.proofprofile.net/proofs/artist/b70a2b96-fab3-4868-ad7a-d3f5797cc9b1.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 0xec2be50ed083a254a13618148df44fd310fcafa0b0f26bfd5aaf5f6143b128e3. 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/DEPI82503195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13f2150c074590154ddc743d96bfdf6a743a82de85a7db05e6a114011a98ef3. 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/DEPI82503190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890a0e3f3902a512edb475bdce0ba39ba6df98508d537e0d3045206fc7ffa540. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/DEPI82503192.
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 0x2d83b87c74063c640b9909ec01658a4edec67649b4af2f2bddb7c0f3de4e5ae6. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEPI82503194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb328dc802c6e272b18f6cff122223e96c5fd3ef376a839de28489799272a6f9c. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/DEPI82503196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be91ac9abf439952b87774bcf5ed53e40162fd5f27703a86a83071f9dfee8c0. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/DEPI82501667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02bb982e7ed6f81d7a070692d745a0f0eb413f713bd91c857fb4c338d6c27caa. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/DEPI82503197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e183f92defa9bf4d4bd5aa10d26199af73f0baa090549b92edf5bb628a7109. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEPI82501074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd40d05e2d1f79553b50314c61c413c3f22ab13e90ea9ae897b2227e0bb0177. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEPI82503198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x412b75dd073c36ec5fa1414ff521b1c43c59e4460cfa369d74ddd560969e3b24. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEPI82502386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5dcdd3c71ed52f4ef1797dd88a230bfb46348d72a99c4765a5f4acd5cb5035a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEPI82412054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b82b031ed15ca126220b16ed58b47baa35b5d45d10529e162f0eaf4ac40796. 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/DEPI82412036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb621de64dcc980546b5a6c38f9fcdc76478561b64a229443cf39bdba8f54a6. 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/DEPI82410703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb621de64dcc980546b5a6c38f9fcdc76478561b64a229443cf39bdba8f54a6. 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/DEPI82410703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2cfe0f231d8be8d6bc02459cf63a3c1e2c28728aba48d13d42e64da50a4fbb. 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/DEPI82412930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b82b031ed15ca126220b16ed58b47baa35b5d45d10529e162f0eaf4ac40796. 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/DEPI82412036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc940c56aaf58309518653dcfb90d89cbfd2aad5d6246d0048d8cadaafc711175. 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/DEPI82412933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91f5ef3a9e860e709d10fb141fe958c42f93d2d963803cd4ffec7829a2bccca. 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/DEPI82410704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5dcdd3c71ed52f4ef1797dd88a230bfb46348d72a99c4765a5f4acd5cb5035a. 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/DEPI82412054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5640e6c6a2e8c0bd7cec47978e9851427a51236c0bffd34c92b8d04340f7c874. 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/DEPI82411010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5c6351e342433e0caf89afe3e497495f67bbc3f7220bd3f189284f60f6cbf4. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DEPI82412927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5ef6963082666169892c210d40e907e49129c9c71953637af0cb2b92147687. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/DEPI82412931.