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 0x256d6c8da7c5d18e866c3d57cc2d9ddd38fb919e5731c68e59c2fd98d871e6b9. 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/76e71a5c-c63e-465c-af5e-b6118ce29946.json and https://artists.proofprofile.net/proofs/artist/76e71a5c-c63e-465c-af5e-b6118ce29946.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 0xf6275b1a2a6bf98f2a27b0f572e80558652e49aa22e7bf7e92679cf1a47c2077. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:20:36Z), 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/QZFZ42339026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e078b0801dc33774ab81d3ad52797bd9b3c3faa05315ac9bd4cf4ba68b337eb. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZTAZ2389351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb80e97b95c75ab717291b54f073958676ca4e58d08e2c96d0d87c188585c822. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:30:59Z), 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/QZWFT2462616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa068cdccd61c6b036efdc96907c78d18de29f86546e0fa652875896cc92f346c. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZHN32562686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1d4e744175568efb8ccd939b53e806ac9cba7b3b98ecd30c058385fb6f4c0f. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZTAW2574210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91be9e6f47210ef4b13d668931d6be380ca18142e81fb573c28375e11d0e7153. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZWFG2573913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bad5cb5de1e206737305bbfaec4af45fb316229f08bc10cbd42d4b712655a58. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZWFU2535108.