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 0x036891ce81b42438c7f203e7e4768be8f290ee675d6b3926489c819d33d58d13. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c1744d77-252b-4a06-8d77-2e9777cdd3e6.json and https://artists.proofprofile.net/proofs/artist/c1744d77-252b-4a06-8d77-2e9777cdd3e6.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 0x66dde379fa9626e6400632e1cab0d56c67fabcdd11226daee4aa100b89779af8. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DEP551989247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa532a3d7d6e19cff49476be850466964cfa3b996cbb4a5954945902c77877618. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/DEP552004568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce90cfa0f5e3045ac2d900a5888371d04b771a9bf57a2d1e34640c550c34c6c. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QMBZ92404563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c29b3ff09e1f1d2fa864780a041f4805263989520774eb662f7acfbdc869b7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWFK2401049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b509cf32a591b60b3b0bcb7c0c19d1c0e9ad7c8b99e9014816a9eb156e2de0. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:52:58Z), 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/QZWFX2437541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1136366e0d35fb8d8c11553d3d0c7f4a666f1dcf188a7abc5f2298eb62563934. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:00:29Z), 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/QZFZ72534715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9780479f76fbdea7bc088a816eb6e1b44eabcce7f4c97e754b96b2332391bc3. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:29:59Z), 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/QZNWV2553553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf3ddb94d59880a0c091dc281938057f165279f4cbc2cb4482a92855f39b192. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ7U2503323.