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 0x0f2af1d8da3a34bcd6aac03fa1a2a76e42b2546b39337a85b83550c4ecd6a04f. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/668acd64-b7da-47e9-98b7-79d286f5427e.json and https://artists.proofprofile.net/proofs/artist/668acd64-b7da-47e9-98b7-79d286f5427e.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 0x41bcc07cb7f51bd495bba3f81c150aafdf345b682817a8a006a338d4c16e889b. 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/US3DF1610535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf95415b2fc965761d8d5059147e18eb109144f665d7d4b2967768cb2a6ee26. 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/GBKPL1780554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3375229553a4286005b8f0688d1f660aa95ad639ccda700de05333a307275c69. 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/US3DF1802808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ebec2b194a594cd3daacf48418de36527e5590f1e41dd7bc635931ba9251624. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T04:12:58Z), 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/US3DF1909373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24305c2bf1fff498b620714c87c58f4f36aca464d03083773ae1f9ae584b8247. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/USANG2002916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dad16adf2a6e2bccac592a1f91e17dad2fda8ce9638a71802a557f7a0d98352. 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/US3DF2170781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0dc32de9e5ac49ae7f304ad86d2774bfd11010f17f40bb3f9d4d0aa9f39889e. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USANG2218261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe608ce151772a650912a08cf0a6960a8d716f7915b027174cd4d89a53c35c1d4. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:46:37Z), 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/QM3DF2220183.