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 0xd43af7dd43cd0127bcb176fb46678a94c18e00a4b84f2cf84dfa99efae6223c9. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b1d6c20f-b86f-411a-8340-d68bf22fbf5a.json and https://artists.proofprofile.net/proofs/artist/b1d6c20f-b86f-411a-8340-d68bf22fbf5a.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 0x1d003ad146cb0a845e525621e4e1dfdae45d67d75814e89c6dab690efa2aea83. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ES71G1843168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41963b7a4b4fc98bc6654a6692d2b2b6e256dbb14a44fd96a0f1cd65a46fa1d0. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:41:23Z), 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/ES71G1843174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e878739c67ca596be17b95dd44fd2bfa15fd4bc728d69120d9b29fbf0f93bad. 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/USCGJ1417179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09462ed4302260126ce8d3a933d21b54d442ad7f9038e62638cb2addaab9acf. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/USCGJ1417180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f5a1eef32b170758178c736791938c3760c716cfa7090c3ffccc21210dd07d. 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/USCGJ1417183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35318c547dfa3f6277cf84af76b2ddc599af3b3b06a08747d7ac18c0e95225d2. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:24:24Z), 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/USCGJ1417184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c7cb0c6d444512be19f1f332267744b4de5a425213b3dc5e2b2e761a47c02a. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USCGJ1417185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7e6d7e7696bde4bc4903c70def49332ed9bb7401ab2660bfe58240408c3bdc. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USCGJ1417186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9d0e53af4e5f7a63ab216364206a678aed87efc2d078e6f271e717c323f9b7. 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/ES71G2023075.