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 0x951b2a2112d9ca737d4cbf6e78c6cb314ad2762cc0f5af9550b9735210d80012. 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/b2d2f92e-f255-4336-b36b-5a4fcd13d868.json and https://artists.proofprofile.net/proofs/artist/b2d2f92e-f255-4336-b36b-5a4fcd13d868.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 0x8b756ddfe6131a74f3be9947361b7d4d67d32e4a3c77d88c979ed13b42bfc285. 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/INS172300345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5184fdc84037fb7b445d8b9f8883bc82264b276b34ae5624150f60c8bd3b7ce. 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/INM302400571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69fdc35a91d08892037430e2415af02ef60c9b2a4d5d3773b1bcf7cf59710afd. 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/INM302400569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a97328cb13fe75b8d32653b7af711876f74fa64b76cc2b11a3a1fb41caad83. 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/INM302400567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc53b250bb0a9df7179886e1ee8e66637f5a6ea2b6f09886b2cfff72617e97f. 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/INM302400566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b1d8109c7e2706ffb9012938bcc29aff4cd8d2809a84e55151995c65688dc5. 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/INS172407536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3dec6900b05a558585931dee947655221bcf04a8f7f6dcc84e655d53b1d011. 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/INM302400565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b834486f3d52cb451da941d33f9bd6e827d2ec98751b8d735512c811014ba08. 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/INM302400563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf66e1a1c59abebe0d50f8ea016b3a217b94daed434ffbd8fadab4d4e67e2e4d. 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/INM302300562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912134a225b36e97fe813648f16afb841e46ab7162ea92a07e6455b37a32365c. 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/INM302300561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9c4f99632d1d563c5dc392ffd2be596bf79b1b8f53e930c7999323f025bf3b. 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/INS172300618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78e3bebeecb619ab3b6d3f2262bff5f08b7380c9fe408f1f57dbfb3189b725e. 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/INS172300344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95bb024965168b8875c1c16189dbb41ddbac3a6b2fc6888776dde903711c78a1. 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/INS172300343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e504c957d0a3d5eb2b38964ca11a622ed4cdeceb172e7869ad4cb598e2f0c3e. 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/INS172300342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2decef6c7fda250d91203084e858cabe8ed31a63b78462b815199aeaf7cbaa8c. 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/INS172300305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dcca30ab4640431359c162c66130748352ccd04f3f7959d4a949ff802f9d96d. 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/INS172204342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d54635de488d1062b2bd90a5c97b12ec39ecbc2ff628e8251e4df16a8e2ec9a. 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/INS172201230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616699a6c45e8977f86340d94d36d5b56b59c221838c21b7633195f1dcd4103d. 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/INS172201226.