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 0x4d351f852eb4f543c8a0969c49c6220c419a93780e39672653c1d35b929d626c. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/587100ad-6b30-404b-8d8e-e863478c002a.json and https://artists.proofprofile.net/proofs/artist/587100ad-6b30-404b-8d8e-e863478c002a.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 0x14bf14387aa8b0c51d5fdc3b3ec09384b0f06bbdb5f60a43f3b781733b8edbda. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/USANG2227871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dbbff11de456084972924d1eeb93f319f6847c8db0446f7cf09d41003fde1eb. 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/USANG2244121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa174028d3287b8f4dc1a6888eeec87efe23545f0d141e59e419c4db3d20181. 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/USANG2250611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c947a5971348d754b632ce5d66fc92087b3b277288a902bd161d129f810b1a. 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/QZFZ42144074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbba042b7223cc75af23348f857c45da05e13bf7aa485c966494b4542a122f6b. 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/USANG2205222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8fae85d7c2b2b308f11d5821a0619625528e4bba2e1422779bf1977d44c874e. 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/QMANG2206025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a7c0f365ce7bb73abde2dabcb6114f124139476214ab207057d1d182f74ba8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US3DF2271174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170abbb2ca393a5cc09bc8ddf17e3f4b3ff765f0fe9ef41c03fdbfb6c54b9fe7. 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/US3DF2271166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324813272c445441dfb01d95bb0f2b098b7415280ef27eba6c36a2e56d273746. 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/US3DF2271168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45a327c9346b669a4ad6076b8c8e28f2d35e26d87d7d204e91e35ebe14d91a6. 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/US3DF2271192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc668baea27d8e7f4d92b1b35cb423c20a946a6b6e10d57da6ebbb50d2cc7fb8. 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/US3DF2403145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d5435850a0eac3d5c09b545303f0f40a76511daaaebd7a26a09906418cfd67. 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/QM3DF2274892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a28cc1882623a8be487af4e8df035ef6c2ad53d328835c579c2a0a18862472. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM3DF2215518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5127766a3f14fab820a6588b104c2aeb7ecd3894d7604f28eaa1e50bc33783. 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/USANG2267301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d32a2cd18c4fc6114740e8620b800da14a752324e39a43591eaee7ae3a17240. 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/US3DF2260542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5016f81415c7017907e754b10090600e28d6fe11aa26f09399e4cfe749631c. 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/US3DF2235642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9bb6af68fee8cb373d1a4c41562b7ab884513b41205b7fbd3a1bdd047077b29. 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/US3DF2205474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c947a5971348d754b632ce5d66fc92087b3b277288a902bd161d129f810b1a. 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/QZFZ42144074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5b4a2e8adcfe34ddf4d848034a7f326a2c5d292305dad2d0d3c22fd186f4fd. 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/QM3DF2185723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb407d07a1799840728528ece1d91a001a331df8bf1926a683246a9cb1785a1ae. 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/QZNWZ2086681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd0209df6df9e7f12bcf6a1669f51b34ddce34b8a407b91608396422c6b1bca. 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/USANG2241483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4d0bd8b1f3180d27a356063aafc1f1749b9f0e7cde9b538d69c53b402be5ac. 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/USANG2241485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a356663dbb5758e045219e4b6d54831686064f02816466f66777177dda77ad9. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USANG2241478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ff278919f5edc8f05221d5fc68e932b712066e10c5083c60be6ef87cdeea04. 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/USANG2241490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7542389a8caa775622fd05f8ce78c876cba93a674dca7e41595993c7f8e1a97. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USANG2243703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47118c0a1b2c2832f1253dadbd53c3c7a810d7f5f570ec93dfc249f88702cda0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USANG2243713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c9405e555a57187eabfd56bbb6e7491a4cbd9f467348c137ea7da1e9921fff. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/USANG2243721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4067b4d708a3ed1b481ef0c1cf8be3068f4fb5b075e5adb8e684c736184abfe. 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/USANG2243780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225962ef669e5940fa1bfcb53d6a184cdbbf9625d4f3a54004242a3eb739fd05. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USANG2243789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dddd8b7ce291375e732c680bb1e372f6a25984da792d43a13274c52f3c8a445. 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/US3DF2550119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58582e6ca4f25547b7101d61eb89902d85941d63caa0a543ba90f44f7a90b42. 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/US3DF2511584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a436178c014996aaf29e2abbbf031f9400feaedb4826e362c8257cd33fb529. 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/USANG2451175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe696bb359c65ef85799dee144a32195d6b7b081f7909d198feea0bd3b8ebf956. 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/USANG2419543.