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 0xeaef70b1d43e87a07556af53a2fc91532d4f9c86f93c25c13d318a346dff8ee3. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4f195fea-bbf9-40e6-b66f-e397ddfc8eea.json and https://artists.proofprofile.net/proofs/artist/4f195fea-bbf9-40e6-b66f-e397ddfc8eea.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 0x35d336a9e726d47540b1d90ce0fde279b9c66c81c4c1c181da46fe89d4c10d5d. 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/INS180700954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3dacca41a4e7f26f1f28eb82f456e7efdaf626a0160c6ef5d37fdd157c12500. 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/INS180700959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6392103bace05a1d1247df7d9f1072f76a6e28f8b6e63cb7d51e3231da05b22. 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/INS180700953.
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 0x9539f4e8414544b3398981df747c7f373ccde76f37bfc11d2985f0e304faf7da. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/INS180700958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc98af643b38eec812d19fef2ceb61ebe78a3b39772933552b22f5c5503f02f7. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/INS180700960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e751461e87985e53d48cee2095d54256f6b3e0f59ddee70203b10bfb9b8632. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/INS180463401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c63f5026b5901575e2bc4415de442db63e8b404fe7a25428f73479a8fa0664f. 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/INS180463402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf2c62fbf24dc996d6dcd3dcf79d73a63bb8e6e9b6c198a9984f11e8e06df79. 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/INS180463403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b62216a7236a329220e250b1a50cbc620f1ce68d6724e4fce7d487444a790ee. 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/INS180463404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1362baafef4eb915c63882378671fd7aae73abc4c3316da6258738398d4002b6. 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/INS180463405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bcb1220d0bbf904aaf2bd9fa95f4688e64a08bea4c19a24bf2d0ff8d94d0c2a. 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/INS180463406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce017ee38f66f4452ff726a15d258a28502d36972f0b72bbf6f420a24ffc2c2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/INS180463407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf422aa43761bd9cdb7056f960ed3d8f82a8d37c43ecedbcd0b996c745e09dfe0. 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/INS180463408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8003c2c46f48cc857122afba0f0869b3f95917cb6f9a04c9e41cf67976216906. 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/INS180463409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b945718da42adeb4e48fd416e892068444e343bab4748191b38a83d522e1c2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/INS189812973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85dafbb0773cbccfe35bac2a46a34664359666ab1769f461b9ecba248e62e77c. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/INS189812974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08900a95af4ed44cf4be0aef3a516a855d4c6873c54dec5d01a4c2bf05aa9100. 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/INS189812975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a92dac3f715d0263a015f9bc7194fadda2235e589cf3695cdf9e55278be53d. 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/INS189812976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c9b34464f0ccf2c65ed1e2063cefaf38402e14991972c2d90d8c7704069a14. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/INS189812980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e9991125f4054a5abcc35aec8bd67e2dd14c2b3d36f57ad079af994c44323c. 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/INS189812981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d2183f1f243edf87323618e5e148438f9ce2626cafa186909cdd430062c6f6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/INS189812982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde7a6c3d09fcdcfbf06698e618e8da4a65d3553eeff08e95f7ee9a39cb09d3a. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/INS189812977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x407d572e7c1094f5f745cb8cfef5023d9e0cf2f41f04893fd3ddd2b4ab11d989. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/INS189812978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667e88af08497749de379a9ea37fbd19471ef2fd9568a3465662c60665fc3b5a. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/INS189812979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5dfff12915d8233cfe5276a82720ef5b5ccec99ee6b5b4dc856416fd5c36ec. 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/INT282000678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4dbae3bab08a36614925b098277dac206387ed756eff4998ba8982e33ffbfd. 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/INA331200298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06cf622f63e19a9ef013b0bb0b8bb51c87c088fc4eb49bed6e26cfda9b13ac4. 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/INT101901368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2eddf8112a165846c47d1bc5eae1b5884a7900eeb0c411b6a0a41d05227e2e. 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/INT101901749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc587c71d7c59e29349f12202b618a61322c58d33ea228ac1a99c50bdbc28b16c. 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/INT101901752.