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 0x051ccdeeaa8ee2ea27686f8fcbd570e646226d51b50e12e17ad72c71a4f3d0e4. 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/5b9ec6ae-fede-4ff6-9971-118544d2dc29.json and https://artists.proofprofile.net/proofs/artist/5b9ec6ae-fede-4ff6-9971-118544d2dc29.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 0x616da8f971cea32534671c5a16b74013b0fd5b0663258b7a94df84ed849e2bfb. 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/QZK6P2357593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f50dc489ce926718e10d633bccaee0bde7ddd3b152b185053888dfe6813f10. 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/QZHN52323454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d2f5dff9fda44134b8ea4548520ca43d87908f713d5fa92c9240f6f41a807bf. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/QZHN52325999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4fda6b04bd904efa140e744c4ae648e89507e69ebbe6f8f2d17a345858946f. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZTAY2316418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aeb3b52e993e15b7ec11d5259c048f6c403d23df9e257b9d28be3b2be68e0ef. Chain 2 (Bitcoin): anchored in block 957565 (2026-07-11T12:18:39Z), 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/QZHNB2446625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4937bf6c0e37bfbbc3f43b31f02288ba0b05a97b945575812404ea390fdae36e. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:41:25Z), 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/QZK6J2411551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e9acffb481ffc98706f1d510ac412107fbf7bc836582398b4afd0d834221f3. 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/QZWFU2478952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f9bf081e8168bdcf4166a4daccbbe8754fdc14314bdf908bd2baaaff518f2f. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/QT3EY2436865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87bd5e03b12622844eac178587633caf807c631ee4e6887bf0c35c5404cd29ae. 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/QZFYZ2540208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9846843a5ca220b1323c9083f783fac240b0b1f551974505337b9d9319e1a1e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZMEP2508681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24540989f84fc34790944a98bc8d2779491375ab494f579bfc719df086c3bce. 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/QT6EC2565194.