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 0x1e66782bab75d893d8563f313dd1384ea199eeb099611b356f619a4cd979d0ad. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be017096-1516-4b97-b27b-ef49b9942787.json and https://artists.proofprofile.net/proofs/artist/be017096-1516-4b97-b27b-ef49b9942787.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 0x93d4f1aed9b778f8279e5c7269417d8c9bc1ba1dfabe14760fe481d08b8f6764. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZHN62152269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0ebcf0e53d6b4fa7f0c715052613f2fb3273e46f3c275860a66fc68f0df92a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNWR2265121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce18dae6dfe9f3dea4d1988af08b2857f671a41f528b34ce2290ff7ad5e4a2a3. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:32:11Z), 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/QZNWX2216328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1bc6af58a167367fe61bd8f2d528baaa22270b6c3728c1962de8ba5f41848a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNWW2286348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8882ae0719c641889d75de4c8b7dd9033b91892e9018ac1599894f63eec0432. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZNWX2211769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a3e8d0227c7b8e0cbadbfcdfa6dabd437c1deaeb567d58a587403010c3c5b8. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZRP52209436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd616d9b6cb7e64f9c791f72a44997de761c1dc758ef289b7a1428a1c89bd435c. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:28:28Z), 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/QZDA72311850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fadb6dee1728bb5060aa18308d9075c968fd6a0d66edc16f300a784c2c37bc9. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZK6J2487439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x424e0c2e96895ce949d1a2518d5c803f641180ad63322c2047b9d3b5a50384c9. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTBC2352941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d618ac4b9da1c42e73f1194151ba1ae89bd2a21914ea1c534c7de588c835d96. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:44:09Z), 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/QZTB42528271.