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 0xf465770082ff4c692b89e89b61dd2e081b1314f3001119018f5ca4a88620d836. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/17e8e3fc-9df0-4c40-b8ae-e6bed1f04d70.json and https://artists.proofprofile.net/proofs/artist/17e8e3fc-9df0-4c40-b8ae-e6bed1f04d70.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 0x63ce6c0d4d912a2f1a86b7d841cff2f1f0d5c1198b84a069afa6acaca6355be1. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T07:53:50Z), 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/IL1012300079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab167035f97f3ae1e59fecb77890c9f62092bba9d5a4037a89888aeb1603cec0. 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/IL1012200764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9596b34c543973a81ac7c1b97e46d49a518ed6b645bb2a412dbc3a3030e797bb. 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/IL1012201711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e30772bfe5c737b2c6f59b5db19b931a3193d48bcc55d448c9b46129f09b8a5. 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/IL1012300080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee841e3c07b4305c5634876605390c9cfd0949d688749b0d48126f800293a2f. 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/IL1012300441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2a763ddb94159a50a11b4c6a6432e595a6a6466a58b74c4a7b7a8a203b2b5b. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:21:32Z), 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/IL1012300446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4775bfa3fe764a6a74d1f39b87001b873b30765b285bda9cba9f3f79102ea8. 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/IL1012301787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4373c1692fa1b092864763da7cac79eaff2b9faf8600c36f4673cae611de9b3f. 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/IL1012502227.