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 0x3c18668eebed34d2ba0982ce879155dd4e4b9e440c91283e4cf90b84be294621. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/62a167ed-8515-4336-9f0b-ece270e5a9b3.json and https://artists.proofprofile.net/proofs/artist/62a167ed-8515-4336-9f0b-ece270e5a9b3.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 0xf9811f77f03c382939fcaf28b9923cbaeaf4e4df594af5809ecf9e1ed912b40c. 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/USCGJ2235796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x034216b5981f18a6aac8b0be9df67617afc99e0c224bceba045ef6ee87495eda. 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/USCGJ2235797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3751a912b5628686e743a72615b14da1254b67517d0467aed061347745bf4989. 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/USCGJ2235798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a907b59d4620ac8769fe6c127e1770e88af5bdb4be2c2f4ba804d59299446f. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/USCGJ2235799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9045eef1f2a72463890c55b81c4e89b18ff9f4893b4a0a6fc7cc09288d48b7eb. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/USCGJ2235800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f85c19692e215a1c2fc991e4acbe4334c5ec5d404307896a3f9db22706d1ee8. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USCGJ2235801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19de4a7d4c39f47a908e87472a5465ccc984c8a74b2ddf5fcf45df9a5c883905. 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/USCGJ2235802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21eb89a86d1920b17d5393166373797d90bdc08addac7352b539b2f386b06d7c. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/USCGJ2235803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba6b735e894cf9640bc7f3ab5b3d727c318b7bfeadedb934dbe302a4909e32a. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/USHM82430650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2edbfe15e8d191d006ef986f3074d76624a12623737ab4844fca741c7036d74. 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/USHM82430651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x842a5bdb052160934b0d1d468c1d4dde7f95a296fe024a82a5d062ca5b8b3f5e. 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/USHM82430652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc85744d07f0f005dfa0049adc38bcf9f8efa92dc2c1d960586fbecb9e1ec6e7. 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/USHM82430653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53513f43c8d40830eeec5f1181ab70a9b7918a980fe6951be29c51ab11d76963. 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/USHM82430654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80d0c3f1f8ed69881b206ee8b9966e4b9b3db2f2536ded94f66a75a2b66716a. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/USHM82430655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e24a497e3da5d4db3daa902e13b2fd9003a8a9ba7610f0ed826c1dabc7e07da. 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/USHM82430656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641ebbbb6890d560bd7ab8938fd899276e57d0ea3111c58a146a3f24d62c868a. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/USHM82430657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f237d00eb6944f34107296b7b478c80911fee6cea1523064de546bc6e86039. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USHM82430658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64042e3bff0fae9b723a6908acb54b78fe87dc5d7befb3f01f56553d0add997. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/USHM82430659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f5e5ff263c0fe14b2b878e6296d0c3824e7c644295022455a9648cd00428d3. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/USHM82430660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb85e62634a3e95cb0b4acb06a1e9d1f52970befb3eb3b399a1f37acd42318e6. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USHM82430661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13b50b3628b46eeef59999de8e92d802f103f8100b3f4e30414bf02828db21b. 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/TCACQ1695841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a88c7ff642e5a1a1e5faed5f6cd194ee01e89013ce5c7ab29967aa0c85abd55. 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/TCACQ1695847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4ed2221a2595324c0fd47398b9910d360da729f35efb4520fc91f9e380ea3ba. 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/TCACQ1695853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b835238e9bb80a1974a1dfb32fbee99cdd13943a17bc92ec8f6c9f87b3a8cf. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/TCACQ1695854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae46f783d2b277b022bb705519e1b063ef4d2c6910f576c4a4c8ec802b645529. 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/TCACQ1695855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c72f80625edd5ca6ad4ca594fcb7fb6fab6dc1ebbb429a23363b4d5d654e5f. 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/USDY42265422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09bbb620f466b9f3c359ef5bd8bac15629dc2b6d6da849729015d78c4d895fd4. 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/USCGH2278708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62875607c703b0af1cbb939bf75468c562a6233495df7bc60205d451a69f5db7. 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/QZS632147703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26c0a3120bdd9059a8dd2fdcedff529c6f70296aeb3f7a588be1ee7c0e71c77. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USHM92066371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87eca68801afb84d8fbc9a87c3560055ffe451eafb61684fac903436eed1096c. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/USHM92066373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810f6c7fbc1ab341dfd73c5a1d7aa79f533423640d45744102f219ea868ba961. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/AUBEC2001378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5040af2cb8a4adace3e7d4ce62130c0e528fdb482cee4b46902900bdaf36b9. 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/AUBEC2001379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa851b98512536f337d696182e7a1768d597ccda666aa7c1749eb7a443a0e104b. 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/AUBEC2001380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc00cb35395fadb5fda5bfa75e6ad6c70f0628e786bcd974ef379d16b43f0c77e. 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/AUBEC2001382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3165542677ab52322651ae4bbe11b7d00b9f8bef26687bce689bcf062793bfb7. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/AUBEC2001383.