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 0xa4af6e8f552ec7790cc9b9231e24cbeca79aa5e7f2548301ceb0dd7cb30e2fec. 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/630e3333-56bc-4375-bd93-bf279dced6e7.json and https://artists.proofprofile.net/proofs/artist/630e3333-56bc-4375-bd93-bf279dced6e7.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 0x5046197862881112f1b7abb5330766f05784c06528417511e064d0ddad89ab22. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:09:26Z), 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/DEYX82258887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9f743d239ae251438f1fd4b874b38550a036197749f027cf7816af1d61c893. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEYX82258886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb9b757e966d2d0cca267e15e19a2ce997e5e3cb65e4122390f239ff81cc534. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:42:43Z), 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/DEYX82258884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93e3b04c9266f7aff52a64e9de705c3024ccd091a9c7f3a7c13c16f9419c06e. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:22:47Z), 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/DEYX82258882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8807eda0bcbae66bcb97f3d6795408f926c7dc7e5c67f2f4f7695f15a36b36f. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/DEYX82258885.