CHN may stand for: China's country code People's Republic of China's ISO 3166-1 alpha-3 and IOC country code Republic of China's IOC country code 1932–1956, now TPE Canadian Health Network Chesh
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 0xf6adfe0e106fcad8e570a88baa295c5bb4baced3804ed3db517eb798cb740f7d. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6fcb1a01-b081-425c-95f7-45186654d262.json and https://artists.proofprofile.net/proofs/artist/6fcb1a01-b081-425c-95f7-45186654d262.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 0xcc8edc47c5c6c066edb7e71c0227c5cb6957c8740bda7e602071343534c46b0c. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/GBMA21867333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5675cefd67e7fe11283a045b8a1edecd73242cf3bede3d3f5d8612528eaf3958. 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/QZHN81978108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd19550920ba774cb77de3b14fa807a2454f0b417e87170a4e225f3f726be846. 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/QZHN81978109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2eb5da714031e6e1c9c05f58483cb118abf670d14763df32e7ec0a7135e858f. 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/QZHN81978110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2432d88a743a087cd88d864dd6c598238ff29856e40cbd527dc4d2782f1b780. 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/QZHN81978111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f706e8b16378b7fdcf5e9977597310cfcd61a41cfac0a68bffa99f16f8fbde. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZHN81978113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf1688d419fa168135a963762465f79860e76fc82a4309df7703ddb6539408b5. 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/QZHN81978115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ba88226e3ab11e21d06b003d8072440d4a6561a114398a724646562e45c8e0. 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/QZHN81978116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03430e9629ddc60031c500ae9a7c5369d22e487d0ab789ffed378e5a755de0a. 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/QZNJY2484874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x090764e04ff632517091cf8cb441bbd647c50badcd509b1deef16ec9f730569b. 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/QZNJY2484875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ce65b90190522fb71567c88dd2e32c3fcca2681c2b6289c64d4e278b9882e2. 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/QZNJY2484876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d7c0e319d87e76da0a5ca933986f366f55869e619c2372482cdd3beace7358. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZNJY2484872.
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 0xf9682fb6910b6b01f0336b4d545a168469b1783775b5231667ab547c83fcd565. 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/QZNJY2484873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32644c3776db6be521c47b2f44902e07937805c58f92699903aedf7bc83610a7. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZNJY2484877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04053f1e283b40c7208afbe4894ba65f99d100596e16acaa2220df18f8f0bf3. 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/UYB262000298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5221403a8b926d0b5cc3edadfc9704fee7492da3ba0833ae9808179032d9c8d. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/UYB262000297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300e4e0bb2c2457ca04971e12a2b7a61c67b2fe790a5444b8f1adde2b218b845. 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/UYB262000301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0827b818f39c34e306b32a9bce907985f07e05f3b2b147c11d8a1ba875ab46dc. 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/UYB262000302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x800ee762092ac015ff2e9aa28f3339d1384b4aa46fbbba8a6ed16335b328f505. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/UYB262000303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ffe13d9698072097861a0c4e18c4c0f701466e29f424f6c7e520325de10242. 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/UYB262000304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580cf81b8735d79fce367a5fe0deef91ebc554e61be4b8fc5985ab0048146e87. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-07T15:15:30Z), 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/US7VG1875101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00816991bb6a62d2f336fc6a75b33866dd0a1796a90fd7bf7c48ea9dcfec51f4. 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/US7VG1875103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271d1a86aa325e2a1a985d272fd9014babb0f8b01e59254578e564d2b8eb73e5. 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/US7VG1875104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9000a0676385e777fcf1aff590041e9a3dfc40c876c767a20d93aa2846e597. 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/US7VG1875105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487085bebd81056637310d01407fd403a5f80b9cf76720ceaf5f24970ac8c293. 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/US7VG1875107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73c5889d364633b15c191e8597aeb9077a6d92ee0180e69259c1dd12078dd51. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/US7VG1875106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761d797438b0436cbb9c9f3010014e294c8260d9f99293539856b60223aded33. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/US7VG1875108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6541fd34b3c14897b8bc449f3f41a5c8b468335dd85d3bd66a400a50fe2049fc. 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/QZW9K2261627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d85acb23ba3efe345dc71ed31bc52c3c0cd3fe1820f9162218df962c4e85c2. 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/QZW9M2268285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382da9651b39c2ffce68a5d3f394efd3a87a4564bd53fc7cfa9598eaf1c08e6a. 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/UYL762000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02bca6419d2954c701ddbfa2d79c0438e7ca31e7fbd07f217619cd0401e2298. 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/QZGLS2416817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d15df4cc58c7bb8b7961100ad365cbe782299ffae5facd0503240776e48471. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZGLS2416823.