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 0xf98a1f0fc7ce9f0f2a2c31a57afcedba7818b263b96d74d099c3a619b15bb208. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/80febb37-8689-41c0-91a5-a34b563d4e97.json and https://artists.proofprofile.net/proofs/artist/80febb37-8689-41c0-91a5-a34b563d4e97.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 0xf76132d401b8f7245d90c802a781b208fc331720266865006b4e2944450bd58c. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:17:54Z), 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/QZES92132807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4fe715d78896a1b9cd513c8539138e277bbcebe40f76c3a4d4e67d30fa24e4f. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:17:37Z), 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/QZNWV2156308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2711e777351f1afcb231162d09e6a0e96e199d26c7219240a29a3dadf2a0088. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZK6F2249493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b122b461883f40f2050da861e39413ed9bb0563b8029cb95a4d96f1df741e4. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZTAU2207504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77dbd2e9232b8985a356b12093282e181608ee39e3cb519f5c81ac1174c4867. Chain 2 (Bitcoin): anchored in block 957564 (2026-07-11T12:19:47Z), 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/QZGLS2321365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a4665f2d9cc2b59ae7c7da947c4950f1ccdb87f24a10211e4ca1e684dad30a7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZW9L2430258.