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 0xffc2ebde10bba0dd48d2df355b66e91fc5b8eb7e13393da3d8983736e9854ef1. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5ed880b0-dbe0-4fe4-b6a6-f0a259f05473.json and https://artists.proofprofile.net/proofs/artist/5ed880b0-dbe0-4fe4-b6a6-f0a259f05473.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 0xdc6b8f26ff8f5e0da68abd8137bd41103b97d3cb1dfb47915b9efdf3b6a8089c. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZMEM2195383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90c7802e68cabd82042303b0e182089c718d6ea896b840e846697f24c563528. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:43:25Z), 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/QZMEM2195384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x158b3e3e0e539b2b978f50b781deaf98bbd195e92f8a3948c5a94df4ed66f1a5. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:23:12Z), 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/QZMEM2195385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5eadebf88cd870a252e5c2cfd951578d98f234e563116158f4d01461486537. 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/QZTB32204720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72215960e1e9563dfe363bf255cb457845b9662451abb3c16f79128251f0da7d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTB32204721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8700cb908887ff34d19dc8da0ea84a538b889dd547f52799a818bcd95f443d96. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/QZTB32204723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9620e661c4356ff9d20f10eeb31b1bde736ee1c2083887a3d980a65e4298a953. 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/QZTBB2361103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40178def0c6d289670b0b528666406cfbc7351439aa51d34f09d7a523aebb00. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZK6M2517536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa531c169631a2304b85ed402ce35e9b42cd5ef20037e821d2da1c35db7f85022. 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/QZWFQ2545802.