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 0x65c91d81654700a76f5257ad30322eeba35c7a6ecf2cced5aaea4bf863bd640a. 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/4fc1aa49-bc8e-4247-a61f-6fe30ebf9345.json and https://artists.proofprofile.net/proofs/artist/4fc1aa49-bc8e-4247-a61f-6fe30ebf9345.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 0x5e76798f413ffa003f6f48e8e3a183149aec515c81d6fd97d234ee2f24aee2e6. 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/USUYG1054453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054803a7e8aea7bd8e8566b0630df10bef20e481a015c2aed0b1ef08549edd34. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USUYG1056221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c1c1562d640a827d24a44abd532db8a272213942c29475ddb5bbfb2a71ad98. 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/USUYG1056224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe790714bae1d4195cee17647b2c785c2bd0579c3a5f4c393dc818bf9818e5b. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/USUYG1069893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054803a7e8aea7bd8e8566b0630df10bef20e481a015c2aed0b1ef08549edd34. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/USUYG1056221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733fddcc1bc6c1187698d6b35f95b725f41c5a32441340e6f56aa6da49d266e1. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/USUYG1056222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491a3cb90aa8f9508a5cdca26c7fc6547ab52aa5482199e79111a8d0a6ff88e3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USUYG1056226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26cc47c42a22e574c446ff4ba547e05c794efb8db61a558f35a06bb77235fddf. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/USUYG1100928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670d32bf3211f7e5806451888d1f372739a02510febf228bcbc4493c600d20dd. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/USUYG1109055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b888d42033dc5c106ca2d78d18a1ef727ba4707222738c719f50ccc8aed6f2. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DEU241605040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44be3e877c7b5f22a3bc99942999e5e9d7ee245ac40322ef9bac57ab0a1b8259. 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/USUYG1111008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa3b80e93097dfffc5a8426e3897af7d6970abfc67b99a56e21b67f9701d7ed. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USUYG1111010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ceb3ea45eb07a6019430ec1b8b9082344a054e3a5b910a68b939baf6d95db6a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USUYG1111011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599afde3a27903efb61d038ffef84eabb2e1223033c27944002ab8ea528b522e. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USSM11707801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd72f145a80720c9ebf3441188cbc9e493bb757f8b222fd1a2c87ffcda8a889c2. 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/USSM11708477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df6c75124a85c079a8415521e7775e110266a08234ab971994766155225ba95. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/USSM11806248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf020ec08b6ff1b8b792d3a8db94532f5c90139b0f9f418e2ac82cc44d5dc11de. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/USSM11905553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7656f6f0e3caaab7e13a9e25276f4a18fab8a843a3b6511ad62b543033c44d. 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/USSM11905554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc548c639ef5aeab490257ed8dc4231b570502f8801d4cd9df4fa7dae7d563f13. 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/USSM11905555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8463f8313d162f680e72267eb818e8a12ca4bab2fa5de32e47ddfc1a3eec6fc0. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USSM11905556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026d6a35890c0fbab2288971adbd36b50837cf1f133b3d50a84c2b92b00caf0a. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USSM11905557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc552a9e8b5833d2b46ee2216d7e4517035d206d5fa3a7cdc27dc09036300e5. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/USSM11905559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf01a541b6262e57d6c1b16d8cc97edd2b463d874a5009d838d87aad05e0bb18. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USLD91726429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73e95f46ba4d663bd0c83aa58820ce3580e5aa8193c8176d38dedac40fa27b7. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USLD91726883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b69d2ab19787e3f3881a8644df9ceb39eb7ddb5ffece6eef9ab4ef497f30cb. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/USLD91727426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323d6b97913c5898ecb8d8f1c77d9921a0606545f7b6ed2831cd0666b68f4731. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/USLD91728184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9671bb03f70a01a0911c2407a6fd598256daff4d0d0527a48b0ab97224ff72. 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/USLD91729022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6bdb726f2f379f1908a1f50ab3ce9d6bbbb093733cf2fae3daf4dd2f934682. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USLD91733606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec006bf566d03fa17d1096d8fb1c2df9d250675806b07e0239bfb01ff5f522a. 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/USLD91734227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa004f94d2a3989b47d42d719e227a3401c3cfc3f49b2d0dcc23b4f1185f86c5d. 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/USLD91734372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf70308986e1f95cff6ff720ce2c054663d6846708e3a2b50214dae87d4ec56b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USLD91734758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a63afc6c83a7d486b1589362eb32af84d5c27137558512d42adfcd7ee0a6e6. 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/USLD91753781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa216da59fe5d9aadb7ac0a2f369cb514e07fa329860fc1627928dbb47a022fda. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USLD91754528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b3727f9c328908c13177aa4a39b246e2dc6bc0050a0c23369f7e5e46359627. 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/QZMZ92463636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2550cf2bd586c7a1a0bf5e93fda81768568f756595958358b895f76a00136cd8. 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/USUYG1130557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774286d0fb18c3ff7cdd439d01366624bfaac3de1cd455a116a2a90775680e8c. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/TCACR1614944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774286d0fb18c3ff7cdd439d01366624bfaac3de1cd455a116a2a90775680e8c. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/TCACR1614944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66571441b9a828d32f4d9271c4cb701572732a129d461304617cba3ead539547. 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/QZMZ92080582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafae36d8d6f2d7c18bc0f9b74acea1895759ebb584587e775a3ac3cc653cf7de. 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/JPT592110499.
Comfort (feat. Chuck Inglish & Jez Dior)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e847acd3a0177c3fd830ceffa93d8e19d6d032631cb6d519c3bf393fc2ac1b. 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/TCADC1767321.