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 0xb0d06792597c86b6eb0dde4d48cf88f72ec8c51988bab934ed0501a2fdb22bd3. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/60bf7307-b1cb-4545-8ed7-94ace7456642.json and https://artists.proofprofile.net/proofs/artist/60bf7307-b1cb-4545-8ed7-94ace7456642.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 0x9d6c88f5f1b551cd19a763ab83cd688ee4cec2c68a4253719065388a32f62aa3. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:34:20Z), 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/INU252414344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df51b6dcb89d4cb471efc72e5ac4a0d9f1d9a2e88469256c497462cde08c25e. 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/US38Y2500462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0e4f6accce287ac8be5eb9be8bd84acc020991bfac45ec28366817c6343105. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T16:00:20Z), 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/US38Y2521214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d8d3d9bcbc0fd4cbe155b2b365238e42953b0b0aa78ddaa74415371a16264a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/INC622252128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab50c818354582de84b01a7735420113419aa902a9641614dc34cf613c107971. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:06:30Z), 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/US38Y2529394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29dd566f951c40abbeec1cbf4ca2e860459240aeef4087ad8705ceaab6cb01ea. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:05:26Z), 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/US38Y2529396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b31a2d20949a5c8e04d49e13c3931be109e404f6c0e993c9a240d22409097ff. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/US38Y2529398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61fd93175d48e459ab5f1bebde884fc05ae3c35c3697a02d057d7907921005e. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:46:38Z), 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/US39N2510151.