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 0xa6971957122b7345ec9a39713f9cda399ef7e74388e77cc5ea39b666e2afee46. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/32d9cee3-03a6-4037-ad3b-ae0612ab3785.json and https://artists.proofprofile.net/proofs/artist/32d9cee3-03a6-4037-ad3b-ae0612ab3785.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 0x7339a0cc56d05015bfc3c97c8780dc19a148d4db41f58fb33ab019d682e22d86. Chain 2 (Bitcoin): anchored in block 957810 (2026-07-13T05:55:46Z), 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/IL7192300862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaffc25cbcc390f05eb6962b6c931935b8a812c98e8958ff1bf212fe142c351d3. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/IL7192301614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3dab17389947c101d53d8eb33b1da1635d768e19bcbdafe2e594d517221a9aa. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:07:16Z), 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/IL7192301613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea5db67e2e7c57f91163aabadb88e933126de26440b71a9cda4e44cf8d2a9e3. 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/IL7192401117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273cfcada078a29cc275c1df51ac7c9f9a705075ba1e9632bf71de91f2dac4c9. 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/IL7192402789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2451a6320d64903a57816825b179afa216b3ea59cd9e8d2f69642fc1d9d125de. 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/IL7192500800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f62dd65e605d9ba5a1337cd2aec07f28bbde686892f5f09ef76d6376bdfd94. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRX202154748.