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 0x47cd327a081008a5d08e702c0d75d854a168eff3bca1d79d56456801381f37c3. 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/3a364e68-1130-45c2-ab56-e4ea5c4d866d.json and https://artists.proofprofile.net/proofs/artist/3a364e68-1130-45c2-ab56-e4ea5c4d866d.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 0xe29b1ebec2b6ab425dbafdc9b0d68959afccf3bf7d21219878fce65639c4daef. 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/QM2PV1603860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d822da8c62f05419c4633fad66d8126ae973fe06d64343da7e7602a852d3c0d. 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/TCACZ1794785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ff921f11917e0cbb81f9851d1118c55b25a56d780bd29b9f6adea0e29c8cc0. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/TCACZ1794786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb80317b9e71e7ba318e2b8fc138f9d0cb24f799615514986e98b5099be5bb64e. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:39:35Z), 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/TCACZ1794789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987713268630e02929a73fe84d3f9ec61aae6bd2ddc85bf315e1de6ac37f9f36. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:37:54Z), 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/TCACZ1794790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47494d5d38faa3fbb0b620a7c3fed77b569c989164285f67727202c8aa69c523. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:18:29Z), 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/QZARB1821851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b18b171d31d67dfd2f3816255211285bb98a66db18a8f29215d114c49a46710. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHN92111143.