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 0x496eb588b82a0df1c4e6076aed6825a842e8b5e4273d6de2b67338ab3881f357. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a37a2d54-08f9-48b7-a403-4a577b09b3d2.json and https://artists.proofprofile.net/proofs/artist/a37a2d54-08f9-48b7-a403-4a577b09b3d2.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 0xb92b138ac6810e8ed87454b41169e0a9356b651e1141a36a7ad269e4dbb755c9. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:58:18Z), 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/USCGH1575687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6730e07ea6b920dfd26263b8b13ce4e2ce8f1079f851633242082dd3e993de8f. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/USCGH1575688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a3fd27df09c2f79d52d24c2d5f6b1725bfe4564f4b97ca4c7c99ff286e020e. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/USCGH1575689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e448280d9f78f6e2940153c1914a2bd179399acd3ca665606a2c42407d1bf1. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:21:27Z), 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/USCGH1575690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc239b3634aaaf3477e3e38cb79e610f8ea7140426cc8bb6c985bbf7e8aca65. 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/USCGH1575692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32bc6fbf11d731257ebd3ade2d144dc668563e5c7f5b660924a4844f76f7d340. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/USCGH1575693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c34da52a511da1036bb8657481481bce8dc42f85d6b5772779bad2f08f8e2e6. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/USCGH1575695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70cb84484d999c3eba1360e8c8b8552b3604d7a1898da099796b54d242f217ff. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/USHM21835689.