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 0xf878cdc763ef22bbb9540bb6e626cf677d6a64b6cc25b5cf236f4bb2ca48a2b0. 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/6ff698cd-f916-4f2f-a0ff-8fdab6f25f00.json and https://artists.proofprofile.net/proofs/artist/6ff698cd-f916-4f2f-a0ff-8fdab6f25f00.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 0x170b49eeea76c47eefbe0c4a12ab8b08434a5a61161f482f28f9bff09608099d. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:23:28Z), 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/TR6291600795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ae77379d540d08087d73cb8adb7d20cda0dd24ec0549cb998f2871ea333073. 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/TR6291600802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd22ef2d609dd24e29dd6e7a51114af7f46399ec1e40bbb666a2a6394a1f4fa. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TR6291600806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44751d818ecb20613a086234c7e7a1615cf68f8e429f981692e163a1a6683d44. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/TR6291600698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9e77b47fc04be66a724d3d4f54418a414a0da0ac522eb9bafb7b18103b314f. 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/TR6291600627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x980aad9c9db3686cdedef84a8b95c145fe1b077b215f113087e77434f74dd6fc. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/TR6291600626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9a7247dda3925b46d70460e0f38223b912c68d20d49f409edf5b4edb0f3b63. Chain 2 (Bitcoin): anchored in block 957653 (2026-07-12T04:35:02Z), 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/TR6291600634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc17b3b4d74f21161fa4596a8cedd0ee32ab76984662dcd61bfa1f4234cf7ace0. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:03:15Z), 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/TR6291600625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52fc25228c519c9e172a5a8911bbe838b45058e9bb527c5b733e4cb0ba14dd29. 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/TR0430601122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890f91245b170f48dc2579bfcf9b37d3372957b7708dc0c1f3987ef7ed9a5625. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/TR0430601123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e3f979e854f276db4be7f2b7518bbcda5f186e8422fe90ed2894ff276d2ab3. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TR0430601129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e1a854fd4d5ecdb69ef8c7421d81cdab86451416cd9ecb7818ce88ed8ee54c. 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/TR0430601132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279122c84a5c1f59b29d9750468f055820aa78d7ef56a97753b0a494f8e9ae68. 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/TR0220702122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8240d2813484a4fda844dcda2478d5adf04592b232b2117e60167affdaed0be6. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/TR0220702128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ac5d414da77c3d04a84ea62085b411bc7405ea637f2256eeca233f8c93e7d4. 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/TR0220702130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727e0e50bb8ad89d11db480128d134170eceb4cd625d02fb034f8203029012ee. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TR0430901821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae1c1fc1bed109577eb44d96e23c0cb575810036cb162b05a883d5cc29ecdd6. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/TR0430901822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ad35cb2d674962be6f02981af954bc510fc157327843e7cdc2610700338be9. 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/TRALC1300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84181a7fc5cc8caa9b8e9fa288300f653ab6ac1035dd6707652c2692bbb1ea0. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:32:34Z), 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/TRALC1300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478c5b7d7109af5bc437f7d7655c05ea8474065ee77827c50bd4cfbd0e19f175. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/TRALC1300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898a9179b251e9420ab9d41312eaf8093132218923d7bc8385310edf4369ee5f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TRALC1700016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b50119f49241818a0863fd605625409c986b20eac3ea81019ea5581edbb4a57. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TRALC1700014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae5e39ed86927f8c1df9fcb2c68edf92b8106b9e1b376739e027668d2e95fb8. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:35:56Z), 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/TRALC1700019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d85d5f90c7fb7f59479440cad684e21e081d4853803a1e93be57b65a32b632. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/DGA0P2316721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d85d5f90c7fb7f59479440cad684e21e081d4853803a1e93be57b65a32b632. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DGA0P2316721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b134480b348260bbf0ebdc07d43689b87fc76bad21f7707742d3bb6d5b751f8. 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/TR8221400336.