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 0x1969beca4ff56d9ce22be208feb4d089bdfb11a019269aa499f049693a5a5945. 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/52aa4aac-88cc-445c-9acf-18fdfb5a2b65.json and https://artists.proofprofile.net/proofs/artist/52aa4aac-88cc-445c-9acf-18fdfb5a2b65.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 0xd8965bf8eebe1e7cefcbe0481740e25b91fa1ef5d7cbe594b01aeb64cfb1e270. 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/ATPB51506003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3feed66ab6f699c66fb15104e8d21dd33a28ebb1ae9d4a1728c46414b1e552d. 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/ATPB51506004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c9aabd8899544b6b363b8edc20588c943538f2eb85429b41c1be1e29b75acb. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/ATPB51506005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085da6377e6e19e1ebbb5355414fc66abe94785a177077fe03c9c1023545f46c. 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/ATPB51506007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8e547fa62981e6b679923bdebf360229a8fe5c0ff703a3d8d349d084641593. 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/ATPB51506008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f45b68de3539cdf8045518674cf517daa804e4548573a510529fb8de1f1412. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/ATPB51506010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08cddebb3d34e4e8be79fb46feda2290197d3927c528b2e42298064740cfc484. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/ATPB51602002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea34ac922f3a7b2ef7d08d801817c1571a2eab0e7699a523081a5b30dd08fcd2. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ATPB51506014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb75d316ad068c9807ec8332f57dca7bcdf0b65b8c6a2a24ad2d4b0e8de540d9. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/USLGZ1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7124cf977e59c85ad1bd640b44a9739402a50dd98050359c8c3a8b11aa3878d5. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/USLGZ1700034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf89f763637b543adf041b3af01296c3404674d0b930a7a0aadefd150cca8f3a8. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/USLGZ1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b423749dcf915537b8fd57f8ddc3485393129d0a1924286d821dc4645697e4. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ATPB51801002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa1e3d113f167030bb24c110fe6d2a5001cc46e9e8dd93d085b9be86e21c105. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/ATPB51801004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b976b9135bb1e92bb7eae85293bc718a85372280869314359c735ef5d2fcd06. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/ATPB51801005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfac98a8a13995f22f89683ccbf4596de51b323b99b24c8eeb3e1abd99547aeb. 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/ATPB51801014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab84b29d46f8f7cb544aea36265044951545b6a0e44ce81e4886d0189a48b2c0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ATPB51801015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71287640acba4021cdfde47cd623a7536f3b38a284601bc89c558acb55384e3. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/ATT802102001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e984ccc1aac96f31218b78d615b7d74bd67c5616f45cf83b88c3ea311f0accd. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/ATT802113001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6cbfe3a7d2924fe18530f38ba1685953880f5cd02f9022e688d58fbcc0fe3c3. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/USUYG1373544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5e61af9a6a06ca6a56a7e21e96d893f71d3eb67af1eee6e960e8de9ec02b95. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/ATT802127001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406bca7dbe01f465787e3d9e95ae420cc2e64765812e707f0c2a4c76d6d8b24b. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QMDA72169981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c2ead59484f55767ccfe8002e4bce749d0ca4b9c75c146bf6a78b1d03a9e17. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/ATT802411002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc56a527ec297562d2f40cef6366052e941f20071e9aa0a0b1689408a23a1581. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/ATT802412001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fdf08ed9d54e122c7de1c4a8b7f3f897da997ac9a212af3d11c598599cfb5f1. 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/ATT802408001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fafd7ca92ce90c1dcfa2e30a14a1e39d08dbc8333c132de8529e556b9b91761. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/ATT802417004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa474c12df087ec0f1107f515432f92a77522f7390708ebfaab603ecd4921d74e. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/ATT802417006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda239d64dc6511a89a5e931585671314a4b5eb48e0112d82980169ccd4815749. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QMDA72478606.