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 0x1bde30bfdffb44bc4dcbd16c8b5b21374ff6e8c879c9c0171e94b7f1ec4440c2. 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/7f2dd38d-e656-468a-91b2-54aea94677da.json and https://artists.proofprofile.net/proofs/artist/7f2dd38d-e656-468a-91b2-54aea94677da.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 0x755b00ba8a77ac0f093f9269f1824b08ce6e6ac813c53edc655d2a8288d8dbf1. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:47:04Z), 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/DEP240400198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f33611a3fc451809dc91b001ad35459c92f5d7ad8733d77ac2fed52d4cc7ada. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:24:52Z), 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/DEP240500275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d05618e9d73114955ad6f7bdccbc904c121ea07025e8d136a08a644b5ee325. 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/USBHM0710012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f90c25eb86cbb307d7f35612daa09a716b9bab9e1f2dfcece4333926ce8b45f. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T10:54:33Z), 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/USBHM0710018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0aee39d7c934c07b91f0f24fec69d6c58d43841cd0cd175d79142d8d4a5a9e4. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/FR6V80758079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75ea479b0a5863961e5486fc02181e0136d3177d516afce890c812cf2596e15. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/FR6V80758081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19ee3dc5f253a6a5398a069447985b52cfd46ed275436bb97b5646668ad57d2. 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/FR6V80758082.