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 0x6dd90a795e303d7f973601da8e52a942267eaf98e32b11c19f95477aa259cea6. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/12191127-19f2-4f6b-b634-dd5859abdece.json and https://artists.proofprofile.net/proofs/artist/12191127-19f2-4f6b-b634-dd5859abdece.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 0xe79340b6a7aa5bfe1e8f552e7ab5cf8d13b6b8fa465013d7c4402a684f2cdffa. 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/QZMEM2272394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb46c3a9da679dfe5b03c6320649e1e6a60e2a85bdb87db6f73c10f62439ea10. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZMEM2272393.
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 0x54e6d1452c0ed724c56e2faeefcb2af2ae3ecf875473b715a29fb3d0d5349970. 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/US3DF2065819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf83e905c71085a8c54ce7962f087e982774c60e4324a4be0fa4ffeb8f9b1c25. 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/US3DF2065831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6120d352c32ed19d07944b48a300707bfe1076a7d6af5520d5391e1082f4951. 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/US3DF2065951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd1f121bf456b73a5f2399fcbc746911ae6c55317e0dc2e6a53cc0275ee5942. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/US3DF2065822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279b3192aec9b8422fa0492a261644f308b1f7c3e75fb123e5d6037b52c81d33. 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/US3DF2065824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d45607a70a6f513646561a3975417458e7aa32c8dfb8c0adfbba57ed062d55b. 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/US3DF2065834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9294195f7c4d914f9bdc4fa74ee8fd63ec480b00a6f90ebd9918cb6c6a99a1a5. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/US3DF2065952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec171b406d9275f0acd46a3082f3c7a1bb31f608c9f00cc749509c5bc4be2cf. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/US3DF2065954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x138d0329c7e2d73300be2b415e4aff0f05b7d59e03e1e26febf1ef6741763432. 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/US3DF2029012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9610c74a6c6d52b7afe31f9b7d52593dd5672c589aa8fe9888bfad46b56fcd. 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/US3DF2029015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59cc239f6c4a2729ba172012b0f972f2637f608092ed84a46b8fdeefa3ea073. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:35:55Z), 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/US3DF2029010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2558f326064a81932256806392990286c20dc8672761f8cf67e94a1431fc5342. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/US3DF2029018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa423aad1a97792231096dede92dc1b11b0971cc770d46c411db66fa4e42289. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/US3DF2029019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad034b8365b1f8cfcfb02530c3877aedcb56639db128c654fe7eb53052b2c06. 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/USANG2018655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9481feebda2fee76fadd087f2b1c2975883bbdd33ff4125b3e50fb3b3d28c6a. 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/USANG2018656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f550ac8e610caf46699f78a525c75c02aad31e6083fbc2acc78fa65e561a6a. 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/USANG2018696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0fccd73e737e8884c9c4a3b5b11cd6350d9c3eeb6c225868eab1703e5fd280a. 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/USANG2018698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ed4eb15d00d7cd17d79b0262977780293c2c99054e6df190c8538cc071864e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USANG2018706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94817b2bb9b34c358bee27e3f370abd672e48996781ffd14c105606359014cd5. 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/USANG2018711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff368251789d3eaf4cb2c9ea7e8744cb2c632d2c63a74671edfaf2a1587350c. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USANG2018712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x688a9e71664872bb86c981040415e7a788cb07ff4130ede424c4eccd2280c2f3. 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/USANG2018713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8988f0c9e474f83ddfe4b618103c14d941c919d1ad21ce20617c88305ad070d9. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USANG2018657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2216fb31740940a0da7352c6ddd1230b62e825a4e9b83e90b159cd58945623. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USANG2018658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387566d00bd7f44de612316d9db696d28a85541799e5c4de520f5bcf6d1e037d. 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/USANG2018715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08c61538c1f2bae31d4ced29c0b0b610a8b0c0e9e4a7fd16e3d754f523d7c07. 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/QZNWZ2408325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e7f18accdf04e637aa09f3395cb470fd11bd884aa2123a00294dd489dc638c. 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/QZMEN2350518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ccdf78537255ed159552130ef48735e95bcf69e418dd95bd1124e696dec94e1. 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/QZMEM2323062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457eb7dc3fb2660aa54835c0fa570cdb3ea833661cf23850ceea8e639b0e8fb1. 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/QZK6L2394540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed9b165de386b7a673a2f0445b9799d9d8c622ceed0183910b3596669035d46. 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/QZHNC2339519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c45564b6f9da20899cd36487a9ddd78852aacd0f980276f2a2c6c266bb7a88. 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/QZFZ22383572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e5f7653e542d3c6f3a5099ab5d9e3a5d1c7beb48a3ea4daf3c1ac1bb24c88e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZFZ22349404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9658f33571c4e034cfa9c749ee7f7410516a863004a68730c16500b746da90ae. 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/QZRP52282303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f18e03e4ad41277f9c9c94078ca25ca3e264382237c0a5281e6071fc163423b. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZRP42276617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360ce0a116fdbfe8ce868b34d0e349d8d53444c8359f709bcbb554d6a67820d8. 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/QZPLS2264347.