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 0x7df9909a1005770b5937407edbd8b272a67da620b231e80c2e2031cd84ebec23. 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/347c7575-b05d-4a3c-acfa-370af77f79a8.json and https://artists.proofprofile.net/proofs/artist/347c7575-b05d-4a3c-acfa-370af77f79a8.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 0x6fcc3ff2f4285f4571ca4297c90cdd5aa439327da232923bde626142b9ad6d14. 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/QZAPG1842500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba1e1ed6be64c163d40dde3fb57369e6f1444ab18df8278a229353b09fef026. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZES71827061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ac7b2c1a0da5cb6c7abc6ee76ec2a131326aa31db758942cfd3505a47cc415. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZFYZ2346713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba85db14de0f55dff37aa18b2eb7b162e3bd9f2c0ed42216391bbe9951ae0a29. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:36:46Z), 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/QZFYZ2346715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b62ba69b0170f03da71ce1dd01316c7cf0a0c8632036b12030371528d06d95. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:01:36Z), 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/QZMEQ2385375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f0dc1451cfb11d01e076c8468f8fbbab2391e58bc8c80d3c674ef2249a1427. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZZ8A2412657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39337364b2e16ef7df35586cecc90dc450ddc9ac16db3ea700b9afd1a6ebf3f1. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USLZJ2538766.