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 0x769aca3104f9814a860246277e16598c4c942b2c7f90d895ed59d21ca4c6416d. 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/9f728bb7-0f51-40ab-a2b8-6e6c30664c50.json and https://artists.proofprofile.net/proofs/artist/9f728bb7-0f51-40ab-a2b8-6e6c30664c50.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 0x9ac84cf76c8352768707dbcb77b1799d77d28570b9bb3921026a05db756eddfe. 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/TCABT1485187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94554ed852935570456b28bcc7a9d721e164e206a574cc6d71fd004ba8db8c07. 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/TCABT1485191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9fa652dd9fceb32be505c42a1f8d6f3b86affb0793cc1923597d9a106949d35. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:02:57Z), 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/QM6MZ2017493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20547f7e8a87c3b3733d90564529ff780d88a237bbb1c248d09a1f17d62ff17. 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/QM6MZ2017494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de1d2378724ec38e9b4a967ae15db03010660315b36934e2bd8f265cca0bf67. 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/QM6MZ2017495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c76be79d94c5b088bfb85bd4f1182d38b1e76548743e0b0f503146d07821e7. 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/QM6MZ2017496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33565740e08db7da22b74248ca3d4e6e3557dcbf78ddb7c1a34fd73b921af3eb. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:09:04Z), 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/QM6MZ2017497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8b4ebb88ffba42054af906ee2405e3452459e94436606eb9df23415bf69bd6. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/QM6MZ2017498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a3803deb9aeb1ee74a8a7c8da6b6b91e0770bf95bb0155f99ea808e6e2bf2a. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QM6MZ2017499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4868dd3e47f856172df1d8c43707d0019b3f765e8af504956167696a699e0a8d. 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/QM6MZ2017501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25de41a28023aa6a820ec8004d34b3b5f2af3d9d0a562733a4c5ab6cdbb1a3de. 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/QMFMF2317834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf78b020f2ab8fe4e8a46738b487efa913214b369b4a31808b47fd2c21b35960. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:03:30Z), 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/QMFMF2317835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb161170ff4936c61a6dbeb397136ab225e96dba17caecbe291c2cbed9d4942fe. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QMFMF2317836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869373592d0845879d0f9ed1dfcf3f5e75ddba409500fb21ea7d1e5caf4622a8. 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/QMFMF2317837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2221cada0fc7f36534eedd35ccf5d10bcf62549b09c81aad12919c2ea5e2f090. 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/QMFMF2317838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90519b8236b46292586ff422fb0141b01be31e3723581b8a8066bd788fc45672. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QMFMF2317839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0020825984c4023c78220f63583d3e82f7d693f4ebd25c14886ea4ec776bbf. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QMFMF2317840.