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 0x194f243356c39c417afdcc029d1fc8176bb280efc3a01ddcdb4f38b4ece4ab3a. 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/ff42d58f-0e56-4d26-a47b-cfb01a131e7f.json and https://artists.proofprofile.net/proofs/artist/ff42d58f-0e56-4d26-a47b-cfb01a131e7f.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 0x174642130a6d62e21d19fb8111ac2914b99f815688a65c2a1b395cb844d3dd55. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T03:03:34Z), 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/TCABY1490715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9496a74f2e65024b9ce691d7f5e6407212de9a3c2fa55307f3e9efef83ea74a9. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:52:19Z), 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/TCABY1490717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f0f1a57b9da27c42926a79d04730262c3c5086f1bf0986cfa7b648cded71eb. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:52:09Z), 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/TCABY1490719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60982386f2fc606cb59071703cfda4c9f786ed25a1206bcbb3ed1d2e54b1d9b1. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T09:54:25Z), 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/TCABY1490721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceadab1bb9284fcf4b2686f0d8ab5911fdcfdde1c5dda4779b97f0780fb0ba92. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/TCABY1490722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8542bbec3807c9fe22951f48f6153d86fe39624ee7847d87ad138fff7dcda43b. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/TCABY1490723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89329c35aa9a03e4c9da25df8f5cf560f84b6c379bc3d911758f29bc8b123b5b. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/TCADR1829538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ccf8a900538a98bb24fe80f8c87c64afa859bf55cb8dbeebf274b86fe6b40ba. Chain 2 (Bitcoin): anchored in block 957633 (2026-07-12T00:19:47Z), 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/TCADR1829541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f0adb23f1a2f9025bdf00d562ab0cba6e43f564c8dd1fa953b2859fdfd5055. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:12:15Z), 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/TCADR1829542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372f44b66cb3fb535ecf9b69d2794b74470c14cbe425975062a4c7b3558218e8. 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/TCADR1829544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87458af15abe26bea3da3fdb1b0071ce546ba95d626481d59b1a599d22ce697b. 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/TCADR1829549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac33dcdcf1f3102cf44042798811286f061d38f2cbd99605193e9acad1403a32. 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/TCADZ1832447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71c3cd1229621885a8b74812cef8046dc273474ef541fa6e205d2b05508e4bc. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAEJ1970369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf496316b0c247287ea080ccd7d302f0a06fadd74f3a2d7d43d1e3e6b5b7ad8ff. 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/TCAEL1952670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f913cd93bbd9edde4991b541ff12f0dfbbf501f1e472ccdf05724ffeac87a4. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TCAFG2038205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af06b246f05fd176bcc66450fcb806a7a6b6ee9d26f64c9a495eb1ebec44bf2. 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/TCAFJ2152021.