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 0x38e81262fdf1ad873c2cac17efa394ade91281d619685fc1774b7932c3af3ad7. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ed289ade-4422-40a8-8af8-c87bdb7c5113.json and https://artists.proofprofile.net/proofs/artist/ed289ade-4422-40a8-8af8-c87bdb7c5113.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 0x8010cad8a43b1eec191fe8d7c951e77e5746edf3b588f6c26e2fe684ea81f3db. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:00:41Z), 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/USHM81866611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ac87f3a4dfa309182bb75fe80b64b42e9d7e9964859f45c2efc87b83d717af. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USDHM2000329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf7586fe30bec33f9a9d023b8341179e607a4bdf89721d6e087978f729269d3. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:25:20Z), 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/USDHM2000330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9dad6908ac571a999e1292c156b7c8ec4cebfc7657cccd9723fca1a055387b. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T10:17:40Z), 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/GBMJG2304020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08fafc0dfddc0d26b6f66f40b3868ccf9b3052e441a16f6416009dac76288a8c. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:55:17Z), 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/GBMJG2304022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b40daa79785f9ef5950ec0c4a9f9df5f3ea2a302f001c1185d010f286a2554. 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/GBMJG2304026.