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 0x9810cb053776be98a8e96009f95b2d7c7901e89619459d1a4d295df9b979c1e7. 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/dee5edb6-6ac5-4f89-9998-816060bf0edf.json and https://artists.proofprofile.net/proofs/artist/dee5edb6-6ac5-4f89-9998-816060bf0edf.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 0xc9f7989860fd021325ee05938eaa8733cc9f9b20c76c47c3f249d693c1af8895. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:47:28Z), 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/USV291490474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261b3578fe901a98af1e62bfef5478f8f89f8d965bae80f61510c68db7cdd9a1. 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/USV291490475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4838675b09743b8d29f32f249904bf6beee822e51ad1137425ef33a8d41bf0a. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/USV291490477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33deca6276155cdc755ee7c66b60aa1f4352e355694af65adfa2aab7d04daa5f. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:37:27Z), 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/USV291490479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0a7cb1ea8b0a802cd695025d02ea6cbb63c44ff0c0a6b802b3fb9a85bd4737. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:18:34Z), 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/USV291490484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5f162e59f130f65ae304321957c48aa765687c675735e44c66d76256cbf6cc. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:50:18Z), 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/USV291490487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf143e4b5ca386d712528328c57e6d2f2aa3c4c739c17476d4466d14e534d868c. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:35:11Z), 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/USV291490488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3961b19c8edf75979e66d1a4fa25522c3c401234ee1b7afa1cb22d70d7cde83f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USV291490480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa4c3dceac83412c510d88772f95e8abee31a87d535d9dd0b8b5235cb006061. 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/USV291490483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0a7cb1ea8b0a802cd695025d02ea6cbb63c44ff0c0a6b802b3fb9a85bd4737. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/USV291490484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc87474ce09af5559262de9255a66686039cc1e3252045eb096ed8ed60380dc9. 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/USV291490489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbfb05a3ebbdbe97ea1bb02898898141c0e248a2a55da02fdf1636132e1b6c28. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZNWV2405631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3314de65d37693950934d41d308b9b9b535173d720d6db8c13de6dac91138d0d. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T04:59:36Z), 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/QZZ7M2566075.