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 0xdd9f2edbcdf48ef38d9bb3815c60cd5024f90c5eff525670c4c9592a89be4792. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6011bb47-24b9-4e50-9b1a-97175d95a7d9.json and https://artists.proofprofile.net/proofs/artist/6011bb47-24b9-4e50-9b1a-97175d95a7d9.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 0x467ac59d9dc17aec179287a64f2d09837fce2a72beb5aabc93e29424665fffbe. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZFZ42187427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230e7b9d10339e6d519a4304d3df9ececdfff12a02ff87be697c0f51fa812bc6. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZFZ42187428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcadb4d3664d0ffdc0f131bcc7d56835a055e39f93ba84b56dd1034b9ad20507d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZFZ42187429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08b268bfbcfe929cb75cade0771ab27ce2368ed27c4b1e8e968042c2db785f7. 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/QZFZ42187430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39bcdcc22bf597647f65bdc0effff48cfdcf4c27eff5b8308e86cd8372e351b7. 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/QZFZ42187433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbcfcd51eaf0c5f84749d1360ed286d588eb4f2c1afc0f57c5f08b236859a2be. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZPLS2100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01663d2f1c27770067c17ec86bcbd1f51da991899cae2db70c01273b17a74df2. 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/QZTB42212765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa68762bf80a56465cb9859978ad9e27c3135fd79bdd523102ab736742e7b3b. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZHN92305028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79325bc0859286c4e4547a5a0eecebbe0942587238ede42d66104b621bbb566d. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:46:31Z), 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/QZHN92305032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d6a2f1a78867eb2bdb32e52243f0bcefbe766a826974ce77e02f9199a13721. 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/QZHN92305034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851881afd61c52fbece767097ad2d1bbe059a04b6fdd46ed70d7310a7d757133. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZHN92305035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77500504540049c383723464766f8c4d755a1bb8b3587286680414703e7a4e25. 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/QZNWX2309785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1636d546f53687f28e9fcfc536a54dfe5f5dd98fc307a1e172d092a1bc455d8. 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/QZTBE2401288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96403c9485737662f5e67826cc330072506af87e29e38871104d8d854c37e5c7. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZTBF2473304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000253823fc6eb8c1e9c2f74dd2f2f8bd2e953e29fe908b13dd37a2c1c28537e. 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/QZTBF2473305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b880d4fbe5f38518947be89c92356d53453aec6adfc769d31d60ebbff4d215e. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:47:29Z), 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/QZTBF2473306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87897cf5d5c84996c7298a784f8b8023388c7d3b3d92522f2940e6d4f9a83340. 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/QZHNC2276716.