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 0x23631ff2008ec35cc1ac53f1c2fd85a81e7f88ebdc0bfcad6a0dc0fb7a6bf187. 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/8581f0ad-644a-48f9-ab59-6566d692d863.json and https://artists.proofprofile.net/proofs/artist/8581f0ad-644a-48f9-ab59-6566d692d863.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 0x380abcab5830bce798d622874a1a6d7232f72e4b4fefe72fb94c618cc53e8f9e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:22:42Z), 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/TCADR1823541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b3e44592b638fcf5fb1c876df44d1f301a9ab57f946c74599c0e269f58cfe4. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/TCADR1823569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc245ed15b42b57632dc827fab4eeeac1339872b13ae7744b0ce82d33c83efb26. 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/TCAEF1908949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c70d0236695a331d7a3bbb53cdd461fb9dbcf4c5dc57f042bc6ce30d354837f. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZF8N2102120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d00c4e32577406661a5a66f2095d2589b38bacee17ae21bd27482da830f289. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZF8N2102122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe70b5cb48cbcffd124257eac6c7d3804f90e805920d9717ccaed1d10501c575a. 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/QZF8N2102132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f74e20bc94c0f9c9b8681ac4be6bd9cfc106ceed5e319cf0bf90100259adde. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZMEV2407074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5168ee917cba38e2122d42c17a664e1def59071f0e2b47ac1a71a37241b94aef. 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/QZNMZ2424874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a699bdf8c9bfc11225f67b24c3207a19a57fc15b2dbfc185c354faf968dc1c. 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/QZJG52543614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be0741a08f1a17b90d641c9231642fc84990cb1b46ca34c3a1209c0c458e6d1. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZLL92566588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d68df7f0665ed387138535d15513971797de336eb771e3ce8e9294565f65f9. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZLL92566589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e43c97d9061cf220eadba3e86cb876d2179b1db665a8dc7b142fe38a78fd871. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZLL92566590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb414c6ddaa090decc7771eb55f36e652e9e82f127cfd59009deabb04a2f7b3. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:16:24Z), 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/QZLL92566593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2696ffcd2d9ef11eecdebffcc7b59798d65740ef91e2d186fdc612141eacbe0. 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/QZLL92566594.