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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc494cd8d10e239f467f23ca0614721f62c67adb2d9b4cdac649163d0a4bd48ea. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa7bf111-6e44-4b4c-a5a8-3c64edbc1e6d.json and https://artists.proofprofile.net/proofs/artist/fa7bf111-6e44-4b4c-a5a8-3c64edbc1e6d.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c184e75135163896ad4e9cf5efa3187bd9f71d09dc731e1ef0bc3b3a32c0c1. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/USHM21158380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf2943474918e6369e7fec03a0ebc5b0f04f5fc14c9109042e3327df0fb5105. 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/USHM21158383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b8c6440ddeb46d83a09ca000d69998802d8c2cc9d51684c5862e7a070da3db. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USHM21158385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652bcd601ffdccd915f75fb3d6e38b244adc850d0df5a96eef7ca8da97ade98f. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/USHM21158326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829c071dd2e2e89c2c080bd813666b1ac613ff7224e918f7b953a94bded4e568. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/USHM21158332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54c711547d760e7e02fa139d005346dcde47f785a1d36f7bcdbb6887a121789. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/USHM21154508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d6d39f75c2e1607f94b681678ddab26967f616797622395ec83392d12e8b0a. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/USHM21154511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c39c327a5d55fb4b2868b62071bdd8fa6c094fcc54af3927e20d9fb62265db. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/USX9P1106998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c586706d620c28140cae3f065cbbce6b1864ffc1c2157dd3baf8b2c7b63a20a. 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/USX9P1106999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b09b6396edbf8dab35371f5a881efe7ffd6007074d49efe799dcf7baf354ef. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/USX9P1107000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc351522d4123d84c741aac1216cf06c35c4e63e064a5781a1e9cbcbcfde5e2. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/USX9P1107001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0721c4bc22cda16b7c6d20854752b7fe4976c26721afff33c9bb410c731d52d4. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/USX9P1107002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29cd0798b27220f1fbb3f77231d279cb5b5f3c9122ac96d34fc3dcc1861f323. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/USX9P1107003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2876cca65926b6d192b104a44d9bbfa27d43197f4ae93b279c2b1fb373a96c81. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/USX9P1107004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2afdbaabd59266ddb0b69bcb69b401caff19566b4c007afd77607bd0268b9e87. 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/USX9P1107005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e302f70040c80f0421241b64e94753070d4e5cb165a1948a9096f0ba674eca8. 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/USX9P1107006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5108e64e6306c73ae3f2cd0fe7819cc284bc6aed028085ea3f1140068efcbe95. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/USX9P1107007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ac45ffdea3880ead82b1021d77337de7e63bf7b28b168b8bf22f0a8e8b2a4b. 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/USHM81228811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c6da0c8d2ab6c244a0a365f52cdf2926afb5305e238448719d32690029228b. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/USHM81228812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2adce154a0e8d12493ed5c054b71f7dea1e7e2a0e4332aed7bc38aa1d254dc2. 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/USHM81228813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee02f34f516cc4f7bdd2b102766647e4d44a2de369bbc7eec1adeb88c2a3d75. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/USHM81228814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x651f0fd825cbcbd9d470184815bfb79408d2614ed5665cc83f123d2df22e679a. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/USCGJ1382022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c56260c2bb74bc3f1dc211c75f5f57b32c2063217facf94d43ba47e50fc5db1. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/USCGJ1382023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72bea65854c353e4bd030602667f4efc035436978fb401dcbe8084c5a9360c8f. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/USCGJ1382024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc65a006e2f09f15dfe366f17ac96c41f1c65e0572e9bee087066366c163b8f. 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/USCGJ1382025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0429afb24af895235fa2a1ea0c7dea601035f3a15af3e7721cd445a93ea36f. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/USCGJ1382026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a4068acc007933fbf7ba6b3f6e25364ec21c24bcf312df416158d6042dc4b29. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/USCGJ1382027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49bfda2e684a1fe746044bf2d8b338fd12c22ce198d89cc247c78f6ad613b447. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/USCGJ1382029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b0a94a7c16edc38c93fbf98cf277b9605f6b1d3bf81c2eadec90018f057423. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USCGJ1382030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828a29b1e69ee8eb98c425fac022cc09c90d0b5e337f7e9f645e246052777dcd. 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/USCGJ1382031.