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 0x6eff5d8c88d6fd825845b77c60f9c7f3fbc2b9557ddd7da2ba38fe92e0eb37ac. 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/13cec243-6689-46d4-9adb-142c2d20ae9e.json and https://artists.proofprofile.net/proofs/artist/13cec243-6689-46d4-9adb-142c2d20ae9e.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 0xaa0318041993022d94c215fff10d5bba57dc89dd78d88ab0cceb3d604c283244. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:07:35Z), 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/GX8KD2276057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e465cb5ba05bdcaac38f1cb445630f1be1d19a640ca71c65693dffb6c3dcd89. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CACWV2551520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41688aa64eec0eea42c9b40976d998e60572eeeaafb83a438b104bdcb90d2dde. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTAT2541620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x773b07256255110980550e7b8e9b1700ca3b1a9eea7a43fd21cf3811f096d1d8. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:52:12Z), 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/QZTAT2541624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16c0bbe2046f0727c89a47900ee6adebeaca9bf5d8d01ea21124e2719209f80. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZTAT2541625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf900601177decb54659375623855d68a72ba2fca9402ac55a6d0d1223d35db95. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZTAT2541627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a69c37581ef74ac68964bfcca90d11a01d0099a781785cbfaf7721e21dd55b. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:50:50Z), 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/QZTAT2541650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2107e12677ecc8a35c1ee2effbad6d3ed6d54d8b59fa019c7a0e539538cf70. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/CACWV2553711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fed79d308acaf6206f7137cd5961fe31e59a3e25141742c684f95bef2004c0d. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/CACWV2575146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3041e58c7134cd140ce543964b512d03d59d291e799d34fef06a0a1183277f. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZTB92517610.