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 0xccaa7d9b4a80504380f4283cde47a445aeca51afc70bf846e21dcf4206797d3c. 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/30c046e4-34b3-4270-8ba8-926334564810.json and https://artists.proofprofile.net/proofs/artist/30c046e4-34b3-4270-8ba8-926334564810.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 0xcb08b2c890a2b4dccbd6c3be96857da54c9aa39b5f7f39bb0f0301accee85cbc. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHN72160665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e9e96092ece5935652d2301b67802de762c27218e9e37ae3316dade84ebb76e. 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/QZMEM2183052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bcf1edd3e185ea614f4865b1ace7d9a0aab14f8f66078d8f62fc00325d086a5. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZTAT2136464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a839b3daea89141e9e53b3098bf659e529cdb8ce55ebc01f8b197434f91ca5. 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/QZTAT2136465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb306a9623493834d16d3f4b534459e8f2906927521ef0a5a45d8f35bb46b479f. 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/QZTAT2136466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7269bbffbb091a8ca379438bede9e5ecb95c0dd613efd56ac6a9e74458b9f1. 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/QZNWU2237090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c6bc02d0f2ef83b3ffaabeb4a2550aefc5ce55d7aae89eb7b06726caf35439. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZMEQ2234635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86cd5f118869c3ee9720c93d4bbe924267660521c1b95d86558b47323028559. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZTB32295582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1107379515bf92d66b2973e0b948958347aeee6605a72bced2ccb0cd5f2a8027. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/QZPLS2261900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0061bd2d0fce604a61afb88cece76735cd861d7a9e5e17cc486d828f264429. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZTAX2257437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd2caba5f1844b786773c6208872c6b2a686287de9680d408a3017b295b8eb5. 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/QZTAU2351178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5947813b7bf1e326db706867d00dc39c35ffd48d757ef720ef80360a3f153aeb. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTAY2370044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f1c3fed241a07ede002b7ac38c49e803a15ea1d9ae2d387e82ac983d267cdb. 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/QZTAU2351374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d28ab7e9e097d1c16a8736a15a4154f982604e382dc5431def6430a34062042. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QT2VB2403225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5bb01e49498d48e71ea9231a28d884d9b69e9adcd6a579cd7a8b492065be64. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/QZMER2467903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6f88781eda7962124efa5b05fde972cc9bb2ad5e3aa553e43b0d78e825142a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZVEM2559674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5544fb76f7b647d16135546bc7d7fdcf9d696f329d21f46fc2348aa5bbf1283. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZVEM2559675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5bb01e49498d48e71ea9231a28d884d9b69e9adcd6a579cd7a8b492065be64. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/QZMER2467903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d28ab7e9e097d1c16a8736a15a4154f982604e382dc5431def6430a34062042. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QT2VB2403225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1384b73b4e84d30ef3a4dc5677557d489c240a31de07189e656ffad42b1af8ac. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZVEM2559676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac41585f8d9a262a6170d8f911a0ba6f69d61a635e305b9614f2eb8dd56c09f. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZVEM2559677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8acda16ae503ecfc3e8195ab87c3caa77f28d2d493893dda9eb76cdc1c5c1220. 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/QZK6F2282481.