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 0x1b7c67018f4547cc6607e8115a336c7f467532d2318eadc9e596d40a9875c792. 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/93fc1cca-d12b-4dd2-b43f-72ff3fbadcd7.json and https://artists.proofprofile.net/proofs/artist/93fc1cca-d12b-4dd2-b43f-72ff3fbadcd7.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 0xf3710ff0179587047a49a49d55ea9993a6de360b1fc835fc898d87d07fa95372. Chain 2 (Bitcoin): anchored in block 957681 (2026-07-12T09:09:02Z), 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/QZNWZ2416439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1424491d5d3d577d6080a5bd420df7cd2a77ff6de192fa112e708e4316d9722c. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T03:23:10Z), 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/QZNWZ2416441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc350ccaadb1144e92c5835019b9cd4a7a3aa429b4f89508b2c6b20ffc5430305. 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/QZNWZ2416443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d71b824021000e1e20543a58b49bbd93bf2ca38faeabee884f11abff9562001. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZNWZ2416445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b73b7fff9e31251e09959942ac269cbe63047ab4142b460541c220c822b711. 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/QZNWZ2416446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf903de500512d567aa948f06fd2675ca622e1fc55cb7653bcb21856325cf7cb5. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZNWZ2422490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf1056a9ad85714e8b9d4c105f34d481056c8ebdf01307bbd351b915ad8f76c. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZNWZ2422491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea1cc1ddb1a08dacd3fc498fe16189f51a3049f90e11814265741df48f07b5c. Chain 2 (Bitcoin): anchored in block 957688 (2026-07-12T09:52:21Z), 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/QZNWZ2422492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x959bb348c35d58d11dab21e1beb86903c1535f82b5fae94ed8065abb23293b94. 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/QZNWZ2422493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c182fbea8418a4565953b02eeb3fd5bd001d31ab7664d3db0a5b4bf454ee5fc. 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/QZNWZ2422499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c113f526d85a16ea2cd414b395b58c88920267927a98eff8317769b8a4dff6. 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/QZNWZ2422501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d025f0c7e1e924680b847f5c69b8498ea0645440b699ef019920e581718b20c. Chain 2 (Bitcoin): anchored in block 957681 (2026-07-12T09:09:02Z), 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/QZNWZ2419451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d8d873f87d4632d108f9b09646a24fc8bfb771a2919e9ced0c38cdceec9c42. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZNWZ2419453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80642f21b4c60facffb8993c38f07893ad45b4102fbf42d74755a4d2aafde6e0. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZNWZ2419456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a50fa2baa0ed472cafa59aaf0c7b57b253aa3177f1cef3f69f7ea7d8aaf62d3. 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/QZNWZ2419459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f45fe6c1bb1767ee90df42203b9e3eee6cf25d3df42978c082b50cd3fae9d92. 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/QZNWZ2419460.