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 0xf25e7f7c3dcd9fa251c9b768dd9e1e9483d270fcb4278a70cf616b2fe27a89e5. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5202819b-eee8-43aa-81c7-07f477342db3.json and https://artists.proofprofile.net/proofs/artist/5202819b-eee8-43aa-81c7-07f477342db3.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 0xb81a26c352a6c5a5c5d0e5d2f517965fd85190b96705f4421f3c6ae0105179df. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:59:50Z), 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/QT3EZ2465400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a95244a9bfdcb9f7e481b0b78678842b8a608bde2766299d27278895ecbf229. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QT3EZ2465403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c52d1e0e10bf460cbba1834509385cdb37f54a5951f06de955448b1d6649d7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QT3EZ2465405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32aab761abfd1cd754ed97886b98c706f8f29eb692d07a558533f3e3af250ea6. 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/QT3EZ2465407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6132fc8efe7f188f5421a8db95e4ab13c79f1b588e36609f375932bbcf216df. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZNWT2506940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115d1a99f0167704a5a4ae2b27b6a0ac92ae4a15d4dcab39b3e3e167966015a7. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QZRP42512361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c54958849160f10d6273ec664f56aea50a1dafa84627384a7be521b392eb82. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTAT2523254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a37a6a59daee899740fb892ee027bf2a9cf1eb97c74c86d7b0f813b6ee44c6. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:28:12Z), 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/QZZ7N2502623.