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 0x76cba804e0cc1f1479f2d483cf8051f9ab25eaa2f61559c1357624105b3d584f. Chain 2 (Bitcoin): anchored in block 953636 (2026-06-14T13:03:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/35eaaf68-87ed-4cee-8ba2-8d2712055949.json and https://artists.proofprofile.net/proofs/artist/35eaaf68-87ed-4cee-8ba2-8d2712055949.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 0xd773794e9302440296071fc6807318c30a509a8e6fd63e2b83bba889ceb162af. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/TCADC1767054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa64a87e86bb43e971e35b8f3a50e3269daeee6a43320df37fcee8d382f03f0. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/TCADC1767063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb825c009f96e42fa330f1ffd160eebac0cf674c352545003039bd6674015a4. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/TCADM1811210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e75cdac7205f553c0900e20fed57482536dfa852e963917e750fa9c3d11dcd4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCADM1811217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de086f32348596c3b6f8f0974e2ea136cee438450758a446e61a975002892a2. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM6DC1900386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924e4fb948f441dbbd37f8e34f5ebfc1ebbe91fd612072cdb6bfb71376446b8d. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/USDXS2005532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf79ae143eaea3a118950fae3cf73a068d7295262df9ebc8fe4cf9d49b71501. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZDQH2379309.
Identidad Desconocida (Version Original)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85f2b588bba0607d8fef430420640d54c99c8c7fa0512b350761999d1f6cf39. 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/QZDQH2503044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x991b0e62539d5658ba8df400e126d304e269e6c5d70338f5c9f1c9ba9e6dff80. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZDQH2503045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f6d963b6926e65ea3fbe2791552ae80f9a0b351d82f2440eac5513985c8ee1. 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/QZDQH2503046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec4d6561c875240324cbf245a173072a7fa8a14c1d7e54f298e42bbf4c3f956b. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZDQH2503047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce680939103176223558ae159a7690badbffece1d3d414a65ac938783ba1c45. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZDQH2503048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8b89b8d104275dee5a07c05c4734791d21d5850d629c5b5798837c2a6febfb. 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/QZDQH2503049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d7c710cef88af1356f712308e823bf16b43f3ec6303cbaccb66bbe95925bd0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZDQH2503050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44c59e1c09353166dd2d3213f98495cd15868386f5a63446739af460ca8366c. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QZDQH2503051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81bf974eff6a684a9296373905ace8918640ddb3c65d40fd7c2c4c8ebda0f562. 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/QZDQH2503052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4942ffcf0834f8557cfe03ace4810b2c1903a8cfea185b1d9c4cd64814f8fb9. 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/QZDQH2503053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x343cd8e49d79ee42ade9fa840360d87ab85fffc8f7ec4ad5cba86be937bc12ce. 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/QZDQH2503054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0983864b9ca341b7b81c59afbc65455302239e41a26291cbb1e005bde81d6720. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZDQH2523092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca603f81cbe51551b1e4c2f79808323d3a9718ba06a577f1a7aeb94b06c8738f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZDQH2526913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bca9a980c1f49516389ace97ede6cfd5ddcbc1f80bdddf59129250a98b95f0b. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/US3DF2017199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b54d6d1ae27db7eadeb351142ee0f2f8831d47cebe9ef39e96d4669e1588e1. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZDQH2363184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a091902f8809f1c3c528560af315d1f0a64d15fbcf93912d3d8e1d53d95d2dc. 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/QZDQH2396121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44fe8ce051cff4e20fcf23bd2d1d38faccc74925ad894258acc842938a7a1c95. 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/QZDQH2270864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f602736f8246806721019e1557b40f88fff20416159108d7968e98ababba7f1. 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/TCAIF2413196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a48c852b1b8d17fcb28a10e445ac7d4140407513289c7f749089d3aacb3a642. 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/FR2X41904467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006374f9a3f3ee516575467bf9fa9e650e21a9867b74df56787bd8d9f7bd4af0. 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/FR2X41904470.