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 0x0efb79054bd1b3e604c9f7319aa89107fed8e30b81a2923bb6833d1a71b038ed. 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/6a9f1f00-c75d-46c1-8637-0c09ffb59d01.json and https://artists.proofprofile.net/proofs/artist/6a9f1f00-c75d-46c1-8637-0c09ffb59d01.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 0x5550c4140fafef4e2ec8b1ffb8ab0f8a4cc249b33edfd977703370e5db8ffca1. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/QZFZ32216986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17376c0e487ade4c950ad04439abbfdf04bc961801c935c8ab7272091662034. 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/QZFZ72294380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94ccd0a187a87aa9d0133e6dc69800446c6912bbd37721214bb3491d87c0ac4. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:03:46Z), 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/QZHN42220317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e0d7f943315b6fee06d86d5b464eb196c4c8a730ec9cf808d9d75b09956413. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNWZ2219313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaeafe8777a20a778ef73fced31ef4a80bd096c41193ef833c808c5e33dcd990. 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/QZWFL2379950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234ca5a45d17ce0d1d4db379b9c8a62d26bf71de5ae989efa12e8eb416135954. 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/QZWFL2379954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d24f3d7d2acac238f511a0d79dd0234ad612f3b239e1e85e6b009f341fc855. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZFZ32393318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6aa4344d18f060e4c91e38bc3ae53297b4198103b3d3449e114ff83e28b926. 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/QZDA52388669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8699408289c6e6cd43c2f11341321d6c63e8e7a3ddc9765d35426bfb2bb052. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZWFM2389898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa00b30c89f03a46d95a5b72a489f04e73de5fb8f3bf8caa0d43ab989693454. 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/QZNWX2498217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8fbb72d3197486645bacd7e7a373e4d162f10be81f202e732eb81b387d292c. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:21:35Z), 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/QZK6L2369904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29073f342816300d3fde698f1b803ff8e919d09eb7d33530601d528ec000cb2b. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTB52463699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab67e48d12803a8227c309a8f3f0750647a6c49520774766e3fbf3e53c0cf157. 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/QZTB52447186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf460e611bfe327c7bc74dc2c282a1cf5eb85385bfffe35174e334a0f9d2274c. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QT3F22434213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29212171d7b97950bd7a861d663aab5df806f2d2883ae191cb7701945938e306. 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/QT3F92522109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b5618f675165ca9782df9ddfc54ba69120b25129c2ff4b700babbd995fea34. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZFZ22381715.