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 0x6bfeda166f628b1a7f2453b5700e1925601ae021c63509f3057608c1e5469668. Chain 2 (Bitcoin): anchored in block 954513 (2026-06-20T06:31:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9e3c02a7-0e3d-4e59-99ed-15894bbf0e4c.json and https://artists.proofprofile.net/proofs/artist/9e3c02a7-0e3d-4e59-99ed-15894bbf0e4c.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 0xaec549d2189d5f934f1cd1dfc3a39938988c965e35634dffcfa1e2b3ea9385b2. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/TCAGB2225693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97edfd83fdce7a36621aad485bf8149c8409a44625fd69927f3ea23ece40bfee. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T00:38:37Z), 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/TCAHC2363715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64fe97f85311a10b8654cbc25012a83ae501877e05a1e722d763bc8fad41d451. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:47:37Z), 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/DGA092397569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036d86673ea40e2896e8bd885d9e013471dad008435f36256c399744459a7f84. 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/TCAIL2415532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76647581ae4b04079d4c305a52352b0db5d41c997b64fff70ed9b25ccf211be6. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:06:04Z), 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/QT6622555728.