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 0x2d84fd8af99910f565584c88f0c4108101e6f23b9f256d858a176795e689f84b. 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/4f7e7241-36ac-46be-9921-30bc2729f515.json and https://artists.proofprofile.net/proofs/artist/4f7e7241-36ac-46be-9921-30bc2729f515.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 0x2e21ffee2c5153906bb5ef007fc10918bafb4ced3d21191a94ffa6466097bbad. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZTVM2250928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc479c4c07913625c0de4b878b3a2c60f3ff3859028a59b2455232e3cc8677092. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTVM2251047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd666b2f0680a3f32612e6e0c640d4697f03567cf2d91887e7115ed71cf4e2143. 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/QZTVM2251232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4bab15f7d821bfcf5dd587ec602d48f7f310e8526a4a6b93f095f6a7fe0442b. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:41:36Z), 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/QZTVM2267065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60dcce51c4476663040fd3ef29906ade170f7306bf543c0be86d3df3012709aa. 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/QZNJV2399772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98ccd74d9c5fc929d354d27b6d4aa6b1ee968248f576d6acaf8032eae6989bf. 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/QZW9M2404110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb85b025d3ef42bdcb8e82fc6a26bf9a8c834d1e0a8c2d44c00d805d95fea0b9f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZW9M2472416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc5929add40a227f00a28ada9a25892fb20c7d52dcf42c4ab1137863449bb60. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/US7VG2512297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a833099c3e69a35fb727e2c620b9cfe8a29df0e2eec8598164a5a8a4572e385. 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/US7VG2512305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca094487575729d72aa2ac381674aecb842fb21838557621f28d1e4fac875b7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T12:16:15Z), 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/QZW9M2472413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f61c26bd343e4e992ad713e483fe82720ef1ff2beca4a8ea3dbc9945d58361. 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/US7VG2537103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7167cee452940679817048b7657f711b7ae3229e8138a2abb38605e854974934. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/US7VG2544613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22e1b42ba2a2833f9bb625d12e69141d96876b21ee16109849e557d05f8f9ae. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZGLS2540112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef8a931121e7ce934083578fa852299e593ae9a5d39e3aa8449054cbaaf5bf0. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:15:14Z), 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/QZNJY2573171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1126b3f049cc64a302b6ba8a84157b169b71defc29e8a5cbf695034af32636d0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM44E2510231.