Chung may refer to: Surnames Chung (surname) Jeong (surname), Korean surname Zhong (surname), or Chung, Chinese surname Cheung, or Chung, Cantonese surname Geography Chung, Iran, a village in K
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 0x9424aefa26e1b9d1f92c37cdadb3e931298a71e2120b18d6936bb68bdf913706. 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/7e8483c3-89b6-4853-ba54-f7418ef6072a.json and https://artists.proofprofile.net/proofs/artist/7e8483c3-89b6-4853-ba54-f7418ef6072a.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 0x5d7540a61ccdb7611f9e61eec48f15ab14673b52ec5936c3480f1eab7c15da5a. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/TCAHX2492132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad75d9be164385a645570a01935efd7be882742daf974fc4312a795abc4b0df. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAIG2491420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87af24b9136457576fdbb86793f9c8ecd9849e485aa8d0895ab3b071f0948603. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/TCAIG2491435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba58ba52830ccaf552cb85174407f99c0adad8080bf65ad598eaa5fb49c25c4. 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/TCAIG2491443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x525755c61daf520f99879b1d71f9207e9f1248155ec3aa2f56a6e96f35580057. 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/TCAIG2491451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7540a61ccdb7611f9e61eec48f15ab14673b52ec5936c3480f1eab7c15da5a. 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/TCAHX2492132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e3b7b40c3c368681d48da4b25ba5e94d8d7345b13b056e89e48c94eebd4a249. 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/TCAIR2424614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea54e56943353f8dca29af96e532719200a40ab819654369a59e2a4bfb06d3c2. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/TCAJP2581276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e01eed00296b85e8052b69572e107d39aa8c34c2a1c0ef76dd8f487646b9b3. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/TCAJQ2508791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd218e6bc3f673b5815b0725e3675568a25f0930300d49fd4549bd43ac778df2c. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/TCAJQ2523340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe858e1e1cdfbe0a5d93fcc0ea9a83abdf9084029ec261cd84d651c7a9437ef1b. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/QT65X2597832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0bf58d17e96e909d0bc5d36ae076c3ef018ece3fdeed86ad98899d95b28fff4. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZPLS2407095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce97810f2a41a90cd01e4c040d30b6f75b35d71cd60cef4d956e3a25334bcd71. 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/CA8QE2400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce97810f2a41a90cd01e4c040d30b6f75b35d71cd60cef4d956e3a25334bcd71. 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/CA8QE2400021.