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 0x30fada1e8ca358db5b17ea67e875b4b79b64ed0f28d081500e43898d8c5d64f5. 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/882be385-982d-4bd8-92e4-8abb9c8d0f21.json and https://artists.proofprofile.net/proofs/artist/882be385-982d-4bd8-92e4-8abb9c8d0f21.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 0x2a02e4c86869331be00826a99a7c8fad12ed8a71613a0d8c1c43822cab8f5620. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:40:23Z), 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/QMJGR1300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63043b74f680c1e2014ef1cc32baef6cd2065a93df0588d758f5ca2fef95116b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMJGR1300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40444432537f6f797462c9354ca839bed91b93d5a1516027236adc26e33a60b. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QMJGR1300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91332626ecad8d62337edcc473e7257be4204eda9729b32747b635fbfef20b40. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QMJGR1300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf827c5c0af36427c9fedc2cf842aaa9464765535c6f8f499cec9271835ef869. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/QMJGR1300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd183680ea4fea628ddee18e21620daa4814ee634a3bc139b1d5c3bb861c0999d. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QMJGR1300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4eef99c880fe6bfea06e1472a85cb213d215cd91d2ef8fcb8ba94b6e4ee0a0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMJGR1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bab15bd0f212175539824fb1ca4d90826bb63f99fafb296d77ca8fd76b845e0. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QMJGR1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1fb4124b22433e09b386c0c41fffbd48865ea2a0feaeeac6b765281f097f552. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QMJGR1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753343056797aac7d0cdf35cd221d7ffcadc5270a6bc16a6c249404f064e3904. 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/QMJGR1800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x638d5a0eae2b0e7b1d751a909714464bb4974499392fd50d7ddfe6c413890f5c. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QMJGR1800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb44b6f3af8e481e455ade1a4698b59791bad7353aaf76fdb7cb178157c5852. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/QMJGR1800014.