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 0x2d941b9d4a8a4a50813b2a52db105988548c977e67cc45836cb346157dcc5012. 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/43b8c8b4-db91-457d-b7d5-66e48a4f2d3b.json and https://artists.proofprofile.net/proofs/artist/43b8c8b4-db91-457d-b7d5-66e48a4f2d3b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xce2b2505325f2004490dcca1882d7daa86ec1bb441c8d27c0b7c6bab51539a3f. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/CBC6H2049397.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe12013175bf9d87dfaa98519343ecdf8558a9f5c0587127fba8409c65c109d29. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:02:11Z), 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/QZP7F2307762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b75ed5d0e906172726b1c1c2e5974b16a2a21670ef757b2113f30414b5c91ce. 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/QZP7F2307768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f011d49f01aa8880699b2bfd617bc03a3bbcd1c687766c3d209482e80f07f43. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:05:32Z), 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/QZP7F2307769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e88158b565bddcf8f737c4f3a5b7b84ddff920049c86061779ce5f030885792. 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/PLH492401432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ad1026607015ee152d4d202d2111b7dfaee858787e302f43125c2ebb2b7a1b. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T19:57:15Z), 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/PLH492401437.