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 0x9a2e53b9a846f78571ef25285c9a7376aa69412516e127b86a60d18ed7d841fe. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3c9c762e-7d5e-4747-82d4-fafe87c13c0b.json and https://artists.proofprofile.net/proofs/artist/3c9c762e-7d5e-4747-82d4-fafe87c13c0b.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 0x5536eb646697eb2c8cd9004c95968512131ab96d1ab2be1d3a497326e2cd3337. 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/SE6XY2340629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88fa823f49da4bda26fd25668c6ac1edb0a874b998fd1d399c0a55f11f9d7a9d. 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/QM6N22445554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab850dcc76ff5bbff165cc1834861851e214f5b0d1fd226ee3131f3eb63d158. 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/QM6N22445623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b0411c343f1963ca604ce391ad1b90aba804e8f99c19e28673d802dfff358f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM6N22453581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1673fa0a75f254a2dca774cce9ae9738aca97b16b09e33b1613aa55165c1cb9. 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/QM6N22456023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45206865cc0853a830a530d417eba1ddb6e2012babd0a2e08d70304b656ab2db. 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/QMFME2367945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d49927d0b43b161d3ffce36398eaac902b882c077a7fa8723f0b481e583e33. 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/QM6N22447960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9701cbdd9aa3c3274bd334c22ca6925b49ed86b48e26c521ed555f45652b0195. 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/QZWDW2471479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c43034444a84a78eb7720be1b3192bbbd932b6fa2f6d950eea9884f9a45442. 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/QZWDW2471481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d201df65f2bb505abe0b89c53758c5550f196f5462ad82bd095ecc788dc6d9. 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/QZWDW2471482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5a02cb3721ce8da69b23863fda50eeeb86de717d8a1721eb0c70d110e78a58. 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/QZWDW2471483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73350181084b49b7768e5289424b9cd8bae6ff013d46f6bfd463480df3a7aa9. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QZWDW2471474.
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 0x8439c126e3ba07233bf9243fff8b27fc2014ab04e8daf559467e3a45fd142a10. 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/ZAUM72400803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b419d188abf2171eb85709cecc8d6a65ae77f4786cc6beff5f2f48e6929762. 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/ZAUM72400804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13015450a427543e06a1bce9b4a47fc445fbb8a8d7d184075c8c0b4f35abdb64. 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/ZAUM72400805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f681e78b1201d6a4d30dcd6e1db9bfab11b7cf60f0c41841d1e021c1ea72e6. 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/ZAUM72400806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781f50663e140b6448d9591a86b2cc76c5b2dcb8312812f519a335c5b46cdd7f. 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/ZAUM72400808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e24e706065c52ad0bba42033f7c8947ecbf13e1ebd709a939090f0a4d8bf592. 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/ZAUM72400815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31752cecad007faed31b96d225d0647d5327b21b3190696cd20497462bd164c. 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/ZAUM72400823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b09638594f7b9929a37e01fc0faa7d4227ee348792df70a1c2b1c73cfff9981. 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/ZAUM72400824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11bfb0e1f2b3b20a388b0721a6648a7445ca1e887f4816de7e400647271eb1f6. 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/ZAUM72400825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b76c5388d6091d9f3e53d9d6ab966eb2e3e44437d6e6590505419a0def7548. 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/ZAUM72400826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8fdf3bd31828ee528b809cbb78ffe7e795895169183141a94f3046503fa8b45. 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/ZAUM72400827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb403567065f63a787523c04aa2c8c7633c4d7f5aba39f2e7ff20f160a4135067. 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/ZAUM72400828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596818f47c8113575974cdab85384056ac8729eb164ff3023d3a94ef856d6a47. 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/ZAUM72400829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5348ec6655de7b932f96ada74db97e03fe779420ce0a5541a9e7e7a4420e4ab. 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/ZAUM72400830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7fc72b66462cd85b6ada5a3b2c1ac280905cb5fc7325c59fb2727715e4709dd. 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/ZAUM72400675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00817cefb753f224330aa3cf22e432fe8c36e7cf9b6ec52e7a6ecd0ba145d38e. 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/ZAUM72400832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59918a1e2d359bb35beef66a8a7f5b8dca4fdabd9bf49e3fec954c36552ee88. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZWDW2468968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140b18d7968e8faf8a4b4b3eb24ca900fe986d21cfc72075f0f35ee2f62d6280. 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/QZWFK2334661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb78385be9cb3c4f8a914efc86f659e6ce960c5147b47f49bd770ee22479f8c. 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/QZN882555095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86bdb27b692460b2d448a63456773724cc53ff5602ff8a27bdea153aae22dff0. 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/QZN882571170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b476accaa248fe8daafe0840b65405c90521029d044e20aac4ab3be5bbe06be. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZN882571171.