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 0x11a638b25a3b337fee22c058f202bf0e70374ef8300d397398186887bcdac161. 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/c346aa70-ce3b-4cbe-ba6f-dcfd28aeb2ab.json and https://artists.proofprofile.net/proofs/artist/c346aa70-ce3b-4cbe-ba6f-dcfd28aeb2ab.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 0x5d94c2d651188f0d489a7a5e0b2e08ee6cbe410cce6789a0294cee58adf22f62. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:51:30Z), 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/CA5KR2063514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5dcf590fbec69fcf52af43f96db5c031c12b4fac60abedb72d5e1c41c066cbd. 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/CA5KR2063527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13bbfff74348bb7d0d72b279b761b9dbd15c8b63a976b46907adce149eac7119. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/CA5KR2063528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef429f7fee93bf28723d3c85242eecd7d7f70103107d8951439d399b0d9f5aa6. 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/CA5KR2072434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd51d1c70f31241c7d524a84d6b66a9e709f22ca8560e0bbf2504a70be836591. 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/CA5KR2072436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded49835405ade84637ab6982bbcd5f29d82b6283a6d4779051b016b1642699d. 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/CA5KR2082408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d720652ce9ca6b489ee4221acd567235981da5446bc9d2bdfd71350d57e16b1. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CA5KR2082410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04bfe9fb42d03e0025b6c1884f7d24597f45ab6af053f7bd35ce010d63692bd. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/CA5KR2082412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc915c9aec8953eb83afc41579180f6d32a50028d57f224be89507d706ee4e820. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/CA5KR2090008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e897a5c15bdf5361d6407d347115d2f3f500b794bea31ee92d5e4f38a875c5. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/CA5KR2162713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x365d737ba24a1129633598ebf8427fce980259b62261af99639dba29f3ac3aa6. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:05:24Z), 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/CA5KR0012486.