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 0x244971a0ad4c408c641a08cefd713f0dce61821d85ab88773fe73ee4864e83a9. 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/998503f3-a165-4ddb-8ae7-70be05c6715b.json and https://artists.proofprofile.net/proofs/artist/998503f3-a165-4ddb-8ae7-70be05c6715b.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 0x03ce1f62e3d7154f53e8cf91cf5b56827fd5d2266571b00d2a47c5a151636095. 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/QZPJ32343233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c20fcf2fb3750f5be3c86074476c8cc5e554b283a70d2efefb7b82e599c96a6. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/GBWUL2565240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x759584c523a197b021580239c124e790e9676201370241d1af81ad550b051a28. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/USLZJ2565443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc191d66b81ba85134e6a705542d1f956ed9e4556280989c42c89384dab7d598. 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/QZFZ32454901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8894be91a6da63528ee34b58b3a13be8183a5642b50b5f82345be159fc5b493e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-27T13:55:28Z), 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/GBRKQ2517639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49cd8b9234b23bbcdb594f96eb1ebcb12f570d2be4d752bd4137bb9d279bcd80. 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/USLZJ2558649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabbe9b73d2d89db2acaef084e04d6f457633a3826cc84836f4185914c6f061c3. 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/GBRKQ2517598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45fa133edeac81d23a798b91fd6754e69102cd97cee810b1f695134f59eb0523. 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/GBWUL2530622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4870d6f87b7ca66c48dc9a71502c21b037aeb9fe15b51f0dd8356d10167efcc5. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USLZJ2586520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeafeb47918c5621c40bdb5ace56f00a639bc6a46daf3f93816c4f039f5017e4a. 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/NL9KR2481786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c50f202729a0813e947ea7ea1614ab535c5933d030eda390c178479a7667e5. 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/NL9KR2481240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5f486e499fbabda5e20c20783d7f0f9c8986507990a41270df110d492e9ee4. 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/NL9KR2481565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e71df6cf168ff5754682ecf82438f9c791ef91bfc620c2cd8ac3999a6b2bcf9. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/NL9KR2483103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f03d4a8d1af1e6028503188613d543f5ce96aa3919fd6b8a2d7007487ed630. 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/NL9KR2483061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x181ed16e4beb2696b7ecf7a0210fd7b1c20df61dc06da807dc33b2f80c08f491. 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/NL9KR2484209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca9937a4271819766d0496b18bd5becd67806bcc3275fe93055039e5dfe35de. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:02:47Z), 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/NL9KR2483938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52640778aee6b26644d3729b9d036682aa69a7acde8f12c4aea25651edcecd35. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/NL9KR2480820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7777f345010f367c3b5f934b3e9e3801bb2d6c88ea9f6255b66017f70f10bcf1. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/NL9KR2481482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9ecb3152d9519089c04d0f8ed5bfa548b28820c46f58a80ec924edb9bac994. 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/NL9KR2482322.