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 0x4da938960f540dddf260c69875879cae69401fd7687d34c0d088f45f43588ffe. Chain 2 (Bitcoin): anchored in block 954513 (2026-06-20T06:31:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9d599d6b-95ef-455b-8d27-91bdefc22a95.json and https://artists.proofprofile.net/proofs/artist/9d599d6b-95ef-455b-8d27-91bdefc22a95.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 0x9625b36a16ffc128fd2ba25bab7fbb765ea2d1efd5f28fe541f6bcb9e557cd11. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZPLS2157327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1854034c23a75f199f6a0ef46881a28361d41e0489d0fcd601cb29fa7c6b0547. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:02:22Z), 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/QZPLS2157328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb765e94698798ebd10265318e109b6cdac4992540828c8b18854c1821e6be16. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:37:28Z), 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/QZHN32158122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad78bfdd55cf35a3e9509452d776b4caa26c26e1e689e44b60b8a2131b4cfd1b. 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/QZNWV2115692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cae1a8b7c177222b621b5dd929c5d5e92160b087c429e3e04870ab59e815341. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:47:29Z), 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/QZPLS2157330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4422a22914991f175b22e49af1ed0ed2958c3d8770a818369f40ec45aa2cbf. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZPLS2157331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f0d4bcb7b6b3ceae7a379b8b3b71b4d67b851ecf4a5f6d378de1eceb6634b9. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/QZPLS2157332.