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 0xaf01d4abef52864b1a3a0a725661c92a31f6eeb91f1d43134900a06204bfca85. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3417c329-aaa7-44d6-a9ea-d17330788d1c.json and https://artists.proofprofile.net/proofs/artist/3417c329-aaa7-44d6-a9ea-d17330788d1c.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 0xd5e469cc4d408a3cfee2d1ef025299ec47c2ee5691d58b654f995abfcc57cb5a. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QZK6L2255574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead687c5d5f05498c5aee79414eb78c455edcac5abd1463c017cff245a4bb9ad. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZES82372335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf20463490cc9a74cc7f014d2cd5d3a59b01d48179ce195174cdbe219b313ec. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZNWT2380716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2570262ac590cee022ecd6b6d7d34e9abe91aa59330d8f29863633e7a52c20. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZTB42385176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x825614d3c65795589b05ff615b580155b1a747e7fd5acaa776178a2fbaa1aa11. 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/QZTB42456393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b3ef481117e900cf077b133c50ab0525437043c527ca8698a582a27644f6f5. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:46:55Z), 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/QT3F42404053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3c1d218c88c28cc3a7e88c2a39615d0cf38d62dede78bc19d72c910a8fd582. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZHNA2528362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf053d7793559ace55d5e3b11f38ed90e2858468d4e47c7fa83c7d5b50a61ec3. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:32:54Z), 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/QZHNC2553184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f43339239ee2ab255cd3eee5b2746a9312c3d7bd520b7a0291436d7f1e6df73. 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/QZHNC2553185.