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 0x8c13caac90156733e40163e8eccf8059bd39bd35c198a891a2d3c53c23216034. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4ebda527-4c0f-4338-a0e9-246e790f99b7.json and https://artists.proofprofile.net/proofs/artist/4ebda527-4c0f-4338-a0e9-246e790f99b7.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 0xb38c6d3b130e083c925fece04684bc1b05aa920402528208703f6f5667b1225c. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/TCAIX2484195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce89cc15c4e1c2456276851b45519a71e8c6ef7587d813ee178fdf23e0ca2d1c. 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/TCAJB2403560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1bac09efa8046b4042f93f2e6e5319276701483133d9cb74b5b00fd6d487e2. 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/TCAJA2421091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe4c349ba953ab5ecb967906f8232d7d47cd418e1bda37cd23f1cb380cddbc3. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:37:15Z), 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/TCAJI2517091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a6e7b0be01d2a3d4b3ad200f622448e61b3aef3a8ae4887c58691dd38feedd. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:02:06Z), 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/TCAJJ2554617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c6dcab9a0bbdf737144e31f52358c770aacf7a0beae1f7460f2c933c1689a7. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:26:46Z), 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/TCAJT2573935.