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 0x5fd19ac38f2934fdf9e432bee6f3ce1829f81b44c8c41f1748f98d274e18d0cb. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f4e78cf6-6032-4080-b707-f3ceff53b3ff.json and https://artists.proofprofile.net/proofs/artist/f4e78cf6-6032-4080-b707-f3ceff53b3ff.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 0xba99ad78da8b11a6df76795b495dd92944a722377be2178f13104a288fc4db62. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US4Z60011902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31744e579cffeeb548633de6d6d21bb13b937828cd60f1517670e8b8ef83df82. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:47:43Z), 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/USK6P0704706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6ecd0bf056bc708ede1d8c634d7ae89f3f9d8896d924eb47a5e16b94eb3ef1. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/USK6P0704707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381c1d340383683cee540751d594f688b5b87511d9e6a227a4d606a54da7324f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USK6P0704710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207c39a889e814359711dfbf38fca90a6e8bc4be33634202fb7d6e6ae9db4c52. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:03:57Z), 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/USA371091926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3aec97d6715d43333f8cd95df0142f377d3ea622df50b5175ff2483ff4bb7bd. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USA371091933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6edf07b535bd55191ab3a05612fd7d9e2452b3376c3f583ff5dee012cb2dd3. 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/USA371091934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe893c942d7fe2d6b7d9722840af834f506d01c2a13be2e0f3b2652f101b1027f. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/USA371091937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6dd981b5eab98c00e0e7a8b272afa18476c1c20b0dc72ea2257940b22cc023. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QMDA61519397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96bf3418f373c01c5eca4c9bf68b4b01a6770517c89c42ae744f04a6944db6d1. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZ9681800085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9789964a9b429f46361bf6949272fd8658d8bbf7be00fe81fcba4dca981e59. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZ9681800089.