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 0xcb966ba5edb3e7a57e077ce6a9bcf563de512c793ba84f3241ad50e12638073b. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b81f2327-a45f-4d9c-b6a4-2f78958b40c7.json and https://artists.proofprofile.net/proofs/artist/b81f2327-a45f-4d9c-b6a4-2f78958b40c7.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 0x6c4762b20e920051494adcc132264dc9e2cc192cbffba8baae076287ff0eefd7. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:03:30Z), 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/QZTB42482242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e92d01de3538a0d401af3b18f1e7d388aed4de4e17658d51f6ab914a157ba53. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZTB42489476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfeb5afd7631258b9bbf90c69ab6bb6a1a8155e38b6515d94dd1d6bd98b543f6. 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/QZTB42490584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa387cd0fd60eac3ae8dcf3b1c5cc4006613ac90d426966da38c4c2f11f5304e5. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QZTB52402620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c5e13e5ac335d441d2ecb949e7fe256a67c495714212d4a808db18bc592f04. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZTBB2477188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf32cac9cee242b7b5cf2dabc11de1db46b11a3f3245540161f930dbd04e4e6f. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZTBC2407829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8a0fdff4090f4e433aae69e24cbd02693115530f539d3558a308d19a4295d6. 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/QZTBC2407830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebba9e8cb8950dc9a868485f760ef16d787310057a1d86ecd156601e284ded80. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZWFH2423022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc213d7440842843f77d0c101377f8a2de6749ff2b6e917ea301888efa0671b5e. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZWFN2427982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9e57593fa6418d402b9f3d0bda70b226cd37631a518efd8f79bb07837764a3. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZZ772418484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28dfa10ed62b98c7154cd732a86db5c476f33b8bf8a17eabd6f9eb42d334eb4f. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZFZ22503013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63da7689b890c01f9480867f66fb4113fe8c488aef094e5ba907903e00245f81. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZFZ22503014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33fd25c9d75948fb9b7edfbb1cf2e0f9548b8a620a48c9b283bb2066a796803. 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/QZFZ22503015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf24ee2d641da92a2340c4e4aff1d18ea8c82aeb15b6bbc5ab46c8baea9c5b04b. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:20:10Z), 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/QZFZ22503016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee209f37371a53a27a38a0e2713b5c63d1ba5bcf90055b8ce700f547866c643. 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/QZFZ22503017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x504b1391ccf04d1e59005c8e11d8e29ca87f2d44d9e775c5557e926bb40ba742. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/QZFZ22503018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13bafe258350e5e36eb3ab545041e4adcd9d1cfee74a429b297be66beedecb0b. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZFYZ2556428.