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 0x1e51cbc4d00736b1c3acdc49f972d151a5fade0ee52dd60d691ea7ffdc3973bd. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d86f9b19-ee11-4a94-bc1b-923d92d13e43.json and https://artists.proofprofile.net/proofs/artist/d86f9b19-ee11-4a94-bc1b-923d92d13e43.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 0x178fc53ee730298ff4a94d9541494db2027aa70a4c69d9dcf7cb19da6de1d736. 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/GBSMU6145238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6930315be94b3ff4409a611f100ce75f11c08a4fb4454b7968db5b9920f752. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/GBSMU6145239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e99577d7857bb30cfdc8603d813d71734adebddd5e3c72f628b3c0ba8478de. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:28:35Z), 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/GBSMU6145242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b0ae6f9fced76a2cb2d286de99b19fd4a139ed6c49cd5f37ae7ad3d1151733. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:42:35Z), 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/GBSMU6145243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x336398d72042ce8ad0579c110ed75f437eb9e6bc381c2620b76bf729cff22521. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBUM72202713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0501a6978df2ce3a41ec3fca70d36b816f7d6947849d898a79c7a17d963258. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:20:25Z), 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/GBUM72202717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ca8c083369134e656cb0435d2f7899a34b3bf41278437c7e2af2853836292a. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GBPVV2404143.