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 0xdd60c72972b8124390064b9ead5ffe8095f78f5e2ff6746408fd81d7459822d8. 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/ff3f4b61-1696-404a-9409-dd4b400181dd.json and https://artists.proofprofile.net/proofs/artist/ff3f4b61-1696-404a-9409-dd4b400181dd.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 0x53bddec69e9f4215a2a57bab1c868cd8d6fd28a3880783585e5d46e16f887aee. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZTAX2399247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52cc9026041530399b2f8d94c1d55aff49d089e61daca783bdfd60ccde65d0fa. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:00:11Z), 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/QZES82450242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff2e3640e9be73bcadd622c5fea996f451cbbbfd48d9105ad0d9a8ded2f1c44. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZRP42373708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x737627b2968c4a0586b5d9db7e3dae657f7b81fea12f9d479fcbab439b60975b. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:32:41Z), 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/QZTAT2360877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x231c14d3f99f0c14e71c3e900afd439071a0064fd562477f30431fd33470bc4b. 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/QZLBC2504614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7fb22cfa32fdfbd50232b2d9d09977b7ded21ca8e18e746ebb0fb8c8168f76. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZLBC2504618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908827111cc2d6ac1c8cad52aa78c862d67767b5ca29cf3cc65ab90996545dae. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:01:35Z), 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/QZLBC2504619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8e630f2d26cbea6a57e562704f64560365aa99fb42eb175e129b8ece04dc0e. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZLBC2504620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ac07f7d79a4b83832f04495a8661c5dbe190e266b52fad426e72106602be20. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZLBC2504622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb06a61dfd58c69bc11217e8f94387ef73f17e022205e39baf0c82483aa36847. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZLBC2506323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68402ae95ee6bfc70d97810c092e573c35f6710b28b2c883a2bd29a5f399168d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:35:53Z), 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/QZLBC2506324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d15a3c3034254bb7e2824c5fa2b604e04183f2d4d783bfd3a6fbc5f9c9b4b17. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZLBC2506325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd98c398253be80b870937eb03186712e909e87e15a18aabfacba5db10c1b099. 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/QZLBC2506326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x747f7aaee2cd77b688ce68845af8231a0d669f62ff9fdfe8aa557a1776883d1a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZLBC2506327.