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 0x891b6616f8cb815cbf13d18592efdfd00ca93d37584a0ab104ed66155604abda. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9837308b-f44b-4031-a23c-3d03bfedd844.json and https://artists.proofprofile.net/proofs/artist/9837308b-f44b-4031-a23c-3d03bfedd844.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 0x18ba898d6fabc7129d8fbd933d10dcc02bb7b3c4b674ed59eb22aba12c21a6ac. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CH7812221291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf87bcc21ee2a73b4db9bebb020195faf113f7afed02194dd299069583e0ba00f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEZC62200744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42dab84a0d6666710a82637d802d3fab105f4da44adfbf7f6e7449ab8398468. 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/DEZC62200745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614f0960150f3f84ed8c29edbb96e4c36da8a073837f237ab2e05c17a655bd2d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEZC62200746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0587c2819376b7d745cefeb4ae79f0ac428ce2245582d006af62d30824495f2. 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/CH7812221886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3efecbe9d76b06dfa94f08a4410069b43252dcab7b4d7dd37b8187fa6f4c16fb. 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/DEZC62294565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8dd4ba5c5a1094b60ff416e3bf4fb744df5c0843a72a15484d3d43212378848. 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/DEZC62200747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14392b11a4397990b37196eb1a57fc9e7d838b661ef6d7059a4d1b39f73e24d4. 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/DEZC62200748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00408d21314fd06d5946310cf92ca54a134552f912f94931f21ff97e2668fb78. 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/DEZC62293025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0bee1ac95976608b200d21064e34758388daf7576d8b8d766086e05b91f3ae. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DEZC62200749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda39875699178cad6dd0fb87293f2ed32518787383b88c9b6675592ca60cae9e. 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/DEZC62200750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa746e978a3865e7f37878f4c1e52657aecdafd4b2093ac9b7f1e856960854446. 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/DEZC62200752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc159df9df3b6ce64cedc0e1927fc868c0c9fab1ed40e9179e0677f469b260dbe. 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/DEZC62200754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe51da77ef13c914cf96d0609b908955a2525582eac155644546bf49ff89543b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEZC62200755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20031392e8134d92fc8e9cc8969e089e1bb9cabd0acf93e7e376f5d9e869cfba. 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/DEZC62200756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ccdbac904dd6b257d37455de35c3a82044d0fa49518c37886f7691fe8e99c5a. 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/CH7812223506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d7081f6b3f53a48439fa343bff9542b6dfae6af495b3fdc40bf06601a9b0aad. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DEZC62298664.
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 0xd69e08c2a6ebac01f361bc8ab02f51a504a51f6e8589dfa9cab45f6bb9c065b1. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/DEZC62200751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb73ddfed87fc8bec4066ec57c86aa6e4c3ac77542fcb5bd3d31809044d4e3f78. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/DEZC62200753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70cf8d719d733fe508c3ce5c054604d1a62f0375c7aa7afd2253f6ea0f2a8f2. 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/DEZC62200757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd3032b93194428752355c9f3555125f3bbac79eda9a76e813a071a44a00115. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CH7812226692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3402b16fd88646d628ad137e8852aeb88a510000423714db231b05b5cbd0c08d. 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/FRX201626413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d3dd02bbad5cb84e3ae39a670cf110e9833a8559fd4e432ec26a39c3282260. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEUV91600023.