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 0x76aaf905642b82d4b5f43b1101794107036fd2d3df4597da28ae7341ee5d9f3a. 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/422f1fec-04de-46ab-a11b-0bda3f196413.json and https://artists.proofprofile.net/proofs/artist/422f1fec-04de-46ab-a11b-0bda3f196413.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 0x8d3e77cac4c96ef219fb204d7475cb707286efcc25146db04082e8e431673c0c. 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/QZTBF2472705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc60011b6002ae72a3a04fdad2c2f05706a8dd5665aa324f216be7500e0871c5e. 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/QZTB72475545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b009fe588bb61339b29af9a5177b245980013d38234d50dac735fff159cf257. 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/QZSYP2499048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2bd5407af1e9278d137f3abeb8b5a27ffe1f5e45c01b05f3b8bd7204cc7038. 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/QZNWT2439888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3f73e2e231960e29d1a49b6687dabdcd2f1c1a2efdc9f069a8c084a7a728c4. 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/QZHN72419204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d94119bbc2f098f42dc1dfc9bc0e9bcb683e0a7a8465e3a25d41dd47df541ef. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/QZHNC2498846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf91f4755777dc98bb9d3cacc86e0466e67e72f64a09ae922e22e72f8bac24d0c. 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/QZWFQ2383652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32982cc6c2220c01ae8053a3eda0f30e3c85b216d34005abcb1b0b3c875a57ba. 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/QZWFQ2383653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966322137c4dec2e7436ecac4411ac458d85769e3c518de02960f988fbba0673. 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/QZNWS2306894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a9482faae3f5496569c4ca12e032ff0948ff84e77e1394549a14b7e32bcd54. 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/QZTAT2316469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f952a30bf84fd5fb64d9fef5a85e85ec109db72e624d7a23f445061bc6ebfa. 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/QZWFQ2383654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9316e9e4c59b53ee324af2e028fd0e8a6aac0a9618eab2949148ce00b7255a29. 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/QZWFQ2383655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a9482faae3f5496569c4ca12e032ff0948ff84e77e1394549a14b7e32bcd54. 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/QZTAT2316469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966322137c4dec2e7436ecac4411ac458d85769e3c518de02960f988fbba0673. 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/QZNWS2306894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe91762f2e128e4436e5cc0fe5a81d66e8670bc4506d14fb10408fafeacd9b105. 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/QZK6J2449392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f223a476867a9ed85d1e87505a1bbe45c1b196f832b87a5a29796c0d043f5bc. 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/QZWFK2328224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3991f67288dc74b21c388e94b62d11959a2f4015c8d98f434f449c36b5c6f4f. 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/QZWFK2329318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe559675b59725ed812d7a67dc926a632bb07562c03b00a16323c697dd796c7ec. 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/QZFZ32426456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0caabacab3fa45a93d73c44a1a0206488e9d4f45b99070a95abf9bbbcb5a426c. 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/QZES82412918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefaf93b49a4a5a94d2b8178b85f5043d7735098b2363c13e6ab1e5122173b04f. 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/QZHN72438837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba5a15110a12aef8bd32ba27d8a2cc80547d214a1da6e5be11d2b16d3feacfa. 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/QZK6J2449394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d94119bbc2f098f42dc1dfc9bc0e9bcb683e0a7a8465e3a25d41dd47df541ef. 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/QZHNC2498846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2e55a538ca3ef491857f942778e8b1ef8131550594c88716ee1bf86857c71c. 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/QZK6J2449395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcededa4eb17b1cffaccc3d2f9c4187199ca8f3aff6735f7db5445db45287fefb. 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/QZK6J2449396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x635a0f71e3171c18f4fdc981a19873bb314a16a51ae349e528bdd292ed631fc1. 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/QZK6J2449397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369d9284416863b87165b35c7e9b1f21d1d0afa2fc9edc27529268bb1a3edbd7. 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/QZK6K2411490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef9a61f05c71b832c0350cbc50bbb5aeee89a64860e363532579979bdefea89. 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/QM7282589980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2493c4f8f911d67d91837de90db22ae8766461544d789b214ced22868dc2ba8. 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/QZTB22545786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x016b1aaf1d3bf13c81c828b12620c17c16366569e949770f74f33093e261e3cd. 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/QM6MZ2565947.