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 0x147518145830816bf47265ba7f050747f69c69588eee75a3bd7ae70006a4668b. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5f9c916c-c15d-427c-b602-a88ca4f033a8.json and https://artists.proofprofile.net/proofs/artist/5f9c916c-c15d-427c-b602-a88ca4f033a8.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 0x35fb26dcd18511192b09c7d21dd0391c525bc699c3652b2a5427e84772a61984. 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/INT501805629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa66a0dc37c047875806b3ccf973f68d2c24c3c7f14f979d34f776bc23ed0dfe2. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZPYN2211243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496627742b2186bd7201f18e9f3ac974aa3c38e4e178f116b4fed73b5fabf211. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/INY242400185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5fc8192d4c1e6ffa22ede32fae07c8257a08b5d006521e16892efcf5cf76005. 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/INY242400193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457aac5ca2ce5e0a0e86d8b8019c659798e0a40bc03033059be94d3cf28e5f7a. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/INY242400186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22014f92dfaad9cd51b30a0ce240e803a531d2e0b70f9b4e6c7e419889f93893. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/INY242400189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299f0f5a7a18c109c4689f2ed83b52351d653f9a05ca560b3d67f737d47c4a6c. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:23:35Z), 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/INY242400187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30856b073dc2e2d662ab54844320ddace6a27ed02bc9d94f0fa04ecd1294f76c. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/INY242400190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30856b073dc2e2d662ab54844320ddace6a27ed02bc9d94f0fa04ecd1294f76c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/INY242400190.