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 0x2f8cc3cbc34dad737fe0b94727d9358834521e1b0902b7ffccf460b558e8204b. 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/9e69a37c-da09-4871-a9a3-d198ac1b0a56.json and https://artists.proofprofile.net/proofs/artist/9e69a37c-da09-4871-a9a3-d198ac1b0a56.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 0xa886bab21d3473cb0bb077da7b42a2021f351ddf9ba1b397b0a2cfe713a3230e. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/USHM82451101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d2e8c9265a059e3f85454a3f02de4b1640c7d8b7663581a0e2ff2184f5668c. 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/USHM92487525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f0907937dd2563c97d5cce9dcd8083ea7d89e47f2cf8d8fe1b1a1112e3275e0. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:52:44Z), 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/QZTLA2535980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9793abbfa637bfe67425dce52b2d51fa8da8bf9ea90541f75a9552085c01f2ec. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:47:39Z), 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/US3DF2515821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9b1f61f4472523b931059cc10488e0ac7d34a63bb9f289ea4644389abf3fdb. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:54:02Z), 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/QZTLA2515705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5572a47e85c8027a130d1369aad3615aae9625c2d257f7ad12a7a26157345e92. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZQAY2536262.