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 0xef3ce1a29917ec89ae4d6ebff098bc66d9a01121b19b60601b96054b431e2667. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e49c0168-b71d-4b72-8d60-a19ec1da5b15.json and https://artists.proofprofile.net/proofs/artist/e49c0168-b71d-4b72-8d60-a19ec1da5b15.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 0x3eafb9df183740a04c8d1af6d6a83dec0c79828492b1531e78e8acec92bce3c2. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:52:23Z), 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/TCADO1897304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a80bb4d48f1eb7c2a6b0e4ea42e7ef3f367b86831e2f3e2834b19bc6fa0fd27. 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/TCAFP2171384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5592cf5384ec8efaa941d1245d929c42a58ef9782080ddcb1e6bd251b2dfb7fb. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/TCAFP2171453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f54b395f38766cb42170529496b14a1edf96fdeb6b367c1253272c057ed970. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/TCAFP2171458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90012067d0b3a80593dde8be99fdee815eafa6dc49a036a225f2d38af2fda17. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/TCAFP2171477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ccb9bc1602c7028249a47a5805909bf0617ccfb14164f7e16a6b5509c1ff4b. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/TCAHJ2312695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c796b94c96cb085bd71edf4f3bce210620eb61fa42b29635ee88e6108e258d. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:03:57Z), 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/TCAHK2331317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd35ed349eaf3436097639de77faa69d8e5f871eac262fa3b65df7b2033f3d0b. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:09:48Z), 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/TCAHK2376341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b3c7336308b904268b80d8bb0b73baa1ce2d2d3c6be6dfabcd6880d111e716e. 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/TCAHL2326234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d9aff328425320ee922418f75f5c49a3f0415f51c423e5269f6811595d0b03. 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/TCAHM2380612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e0ec51e1922c98e65e8c6721b0d25f80c185d0f6c632429064893ebc18501e5. 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/TCAHO2336834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b513e75f2cdf7480bb1508690a029a093ba0a7d0ec647ee4936e7f51c92da11. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:26:01Z), 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/TCAHP2346766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163a8e7c43d0aff189dd33d3dc8545f7c4f3992b31d9707d676bf3c7e674f352. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAJX2538362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb96a289f9b434897518cff78db6cc7f8a872cfab919c57bdf7e189a6938dca. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TCADQ1800852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8491587f22ecbedc2c9f13c7e1a9fcfc6559ed341bd7de87a43c3ee3bf6ef8ef. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCADQ1800945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab48f44fc57dc694a9ef98a3d03c07dd2886a7efb9c730bafda5a6874613385. 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/TCADQ1800964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb1a83a164296185f002544591fbd31d21e5c993b0b19ae478e04f32268bb74. 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/TCADQ1822406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f00510af10625bdf8f41a7e8347909f439b7250b823317ebe2583529101368. 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/TCADQ1822416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d20ddf62a242a5ff5847b44ae27f2d236b9fb01fdb1887569af13dea179603. 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/TCADQ1822423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc45fe96c3c1371e22d30f924b7d5c211358641af3a25dfa3de212cae754a29. 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/TCADQ1822454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91a7bf90db7992ce701feb66d8b5062b2ef8e6d9c6e045dbd7084e092942597. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/TCADQ1822434.
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 0xc6c80513d4a1bf21c35ff0a6b9bc7f80dc962472f7bed09e13b2988d642bdd85. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/TCADQ1800975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc83181561292aaf4143244ff638be079e7c470f3b463a6f54ff82ce16867e8eb. Chain 2 (Bitcoin): anchored in block 960231 (2026-07-30T08:33:28Z), 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/TCADQ1822469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90ae7968207551abcf73c133a48481238021a9d5c60eced8cc8aee167838c42. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/TCAEF1975114.