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 0xc156cf72ca79904a53076f17bda7d73510e65be05c93b709960e47f4cb4cd833. 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/3a52b53b-5ade-45cc-ac20-1cf22445897d.json and https://artists.proofprofile.net/proofs/artist/3a52b53b-5ade-45cc-ac20-1cf22445897d.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 0x4d1e73d4a6b661236125c1a46463a7b97783737ecd17bba20b03ed4f5f07d9e1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/AUMEV2459574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0451b2c29b3f5c076828ef461987bd6c557c6e0e9bbbf41db04e9933c7f19ec. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/AUMEV2459557.
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 0xfe9fdbf6bd72821c46f0cc73f15a19eae39559f4200ff91faa47df444feed480. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/AUMEV2459573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5109d57409936182943a7a6c50b90e6cba3c32a2e9962325f8cf3e1ef8195a. 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/US3DF1807545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52086ee24c82453425024736b702c21bf4f73918a0411751ba096d1d93aceb94. 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/US3DF1807546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1795bdd096b9d5b5f52a1061bc845b7b511ae9335909d82264b84800727cb3b3. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/US3DF1807547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963b13fd1796a983061cc97f8d996f73bd3d28a331082e838015fc61231993e7. 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/US3DF1807548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd090fb39f62b7e481c66e46b49a8db8150e72751c063b7cd5c038960b86910. 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/US3DF1807550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f162fdfa0b8716ce894dde140339013b05ddf97b138fd938a0b3594c3e950d3. 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/US3DF1807551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa542f6c24f2d50bdcadf6c1113aec98ced20c8654b3b1694a4c246b7308d5c5e. 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/US3DF1807552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4118fb3b7986a526adb89b2d03dc8c8dfef354ff633219921ea32dc7de524207. 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/US3DF1807553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb97e7a441e707dc2b0c58272648d36278e5a513c97342d880c9b7acf7f900810. 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/US3DF1807554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94cb6f240d5357c354603568797b3a3e9343ee85f03dfdcf02d651faf81358cd. 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/US3DF1807555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5a6697f1dca6a1f56b1f46707aefdc65eb451648bedb40d16ad98c1f4e78f1. 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/US3DF1807556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf01f26a380018633bbef528f58d6e1ebb11339e8c3ca80aa39543e8be02697. 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/US3DF1807557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8082d27d3ec3653c36e301f54a88789d6aba6a1767c191e2ba523451e7ad96bb. 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/US3DF1807559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403559a86f00786242643aa3e208a7493809a3f1f047b964fdf9c87a76691d05. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/US3DF1807561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec31b30090bd1f490d5cbb663bddfbb0bcf458290f68b64cc679deaf33e8eeeb. 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/US3DF1807562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6509e4d56740313ab98f27fea5b7e1774c2a25a114b58dc601e5fe25bc935ba. 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/US3DF1807563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8515096375d780a642abbb33cdcad55645ad8882c62c7b3b9e64486ce99045. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US3DF1807549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8bb386b6ea8ed0a9d46d542dedfd5ed2d2b264726d596b8b896ba0d5041a66. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/US3DF1807558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f218a18130b1bbd16070c07ab603743f2213997228079ad2d0b3683785199e. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/US3DF1807560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa962013a99990987a2d2e5be009230ce854b54837dee947a511ba5106c47f0bf. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/US3DF1807564.