Kun or KUN may refer to: Kun (surname), Kún Khun etc People with the given name or nickname Cai Xukun (b. 1998), Chinese singer known simply as Kun Cao Kun (1862–1938), President of the Republic
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 0x42fdfe353987ee49fd27989a995cc791169e501e13feea441f46f6c847242c40. 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/0c3bd9f7-3b1c-4d9f-84e0-7e8a60570c30.json and https://artists.proofprofile.net/proofs/artist/0c3bd9f7-3b1c-4d9f-84e0-7e8a60570c30.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 0x76bd69e7f38cc1a47c4dba201a4527543958945025e16cb868640d98e9808a93. 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/TWU711804981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53540959afff86bd73478222bdf7d394f43c032a8a891208eb4abd0eac54450. 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/TWU711906598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94236a310a1e8935c9224ae21f0b9ab457c6236c1d3624c002df7c6067b92de6. 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/TWU711906601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb80605b89c4dec83aff15a1f0b7c6345c75a5effb9b6c57ccb68e36e625e8b. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/FR59R2269231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16a088f4ad6eef1b2654265847abf4d731bfb050e885ac3738c6b40ea9af804. 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/TWU712106421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8e1b04b000c16ff5b57c023dd611fe966d6f144181a3737ecf99e710ebc261. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/TWU712106427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecbc5870526e3a88f96b4c980615b36d2c2b2eacf00ccaf533f756725d2e0bc7. 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/TWU712106428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3792cfc9a52ab82fc591ef6c57b1d300b22dca977f87dbe92051858ee0fc4a2f. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/TWU712106429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde3adf375faafcc05c5255a4f70d660fd70f5efe9e9e755e88272f9da107efc4. 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/TWU712106422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d57a7802315aebfb57f87e4b41a7ad8c2c025b7507372c87dc3ca5f6d48795. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/TWU712106423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d77879838a9528dd1ad8b549d9cb514efa8cf6f8fec4ea225ce71d3f29a46a. 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/FR59R2269232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3cbb6148b388f6de6cf60f12e7f16a5abedf54f87e95c944d82cbfd49ec44f5. 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/TWU712106426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d57a7802315aebfb57f87e4b41a7ad8c2c025b7507372c87dc3ca5f6d48795. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/TWU712106423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de41e99bba776131b222def55fa8cf2058e77b621dad21b47904bdb6efc2407. 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/TWU712106419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3792cfc9a52ab82fc591ef6c57b1d300b22dca977f87dbe92051858ee0fc4a2f. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/TWU712106429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d57a7802315aebfb57f87e4b41a7ad8c2c025b7507372c87dc3ca5f6d48795. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TWU712106423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d57a7802315aebfb57f87e4b41a7ad8c2c025b7507372c87dc3ca5f6d48795. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/TWU712106423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a8578e23f5a7b33e6c1f2b7960fd63e4d998de1a009694d08e30c0d034c0dc. 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/TWU712305847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3cd8909fd181293182d3774aeb08dad7a981368ee14eed8b5e728cbf2212b6. 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/TWU712305844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b41fe952667a4f92f49386454cc42d0137e4e23123ab0351229e529b91903fa. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/FR10S2185428.