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 0x93121f2a43ddeb18e5caa2ac6f768f4559c87dfe1aabb59542549af1c5db77b4. 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/e4e5acaa-2b73-43df-b83c-e36e9a238a98.json and https://artists.proofprofile.net/proofs/artist/e4e5acaa-2b73-43df-b83c-e36e9a238a98.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 0x582baeb90ebfb78e4f0583d83c6c6d3acbe00200e4047df7a63ac2e302a0c373. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZHZ52267525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec3ca7650caad99e7698febfd495d615fc0cd6312786023a9c5305e1db9e450. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZK6J2222712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71bb7f029f1f719edba1840c0558494050553cab20dc87dba3084c90a708b8ed. 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/QZNJV2255714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5d8382009e5f1efcdc598355ee880d02deaaa18e86a451ea21db7417b97b1f. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/US7VG2212653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582baeb90ebfb78e4f0583d83c6c6d3acbe00200e4047df7a63ac2e302a0c373. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZHZ52267525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71bb7f029f1f719edba1840c0558494050553cab20dc87dba3084c90a708b8ed. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZNJV2255714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e81605a579bb80c30685fd90bca14f23dfa9d35bc1ecdb33c936977908194a4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZGLS2316243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7d72f61b5a2c34fe62c6eee090fa9fc40932a1f0ef3ba17c74b7b1a1f5bf1e. 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/QZMZ92400984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac7a098931c6bfd7ac3f9a573352b290816bed3c55dcc7aded274e74f5eb8449. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZWFL2431940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e18e32ab2ec43e4c6e66e5878c376ff9fb929edc6cb75cd310209311d4ddf8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNWV2311190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e18e32ab2ec43e4c6e66e5878c376ff9fb929edc6cb75cd310209311d4ddf8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNWV2311190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26753e76b612eceb56f03e16a56c9bcd07e7cb9d86e49404df36afed2d616cb. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTB32211821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc0d41125cd50144668e3e2b93c566500a122fe463b485298f39fd16d78e59a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBRKQ2205790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c9bdab7eaf2d07563f5b8757014d825956886cee91fddaa2723a4bad943ffc2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZK6G2149863.