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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08e3b80120ef5b22f36ccc61433c524d4a03684097289e4fa0f49d9470d195b. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7c799489-0fa0-45af-9aad-52aae25b2faf.json and https://artists.proofprofile.net/proofs/artist/7c799489-0fa0-45af-9aad-52aae25b2faf.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa690ba84128972c1d6fb70be6fd34e027f46ed75ac7a7cabbccd46ed5321f4ee. 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/DEPI82456311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42171b3e0c3e943a52c6ce90b8195fc34260d8e86a0f9e39c15564816f1a6973. 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/DEPI82452371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a8a66a8fe7a9c802c0e38a3bde6534cc005ab5b2ffeb524063f3a155005549. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEPI82447278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02492ce067f79ac10f95c452967885d6bee140ce4d9a6bb9ce7c62be4904cce1. 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/DEPI82447273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd752696207965448584034841a5aecefefacd8ed48e3b957c6eabbb1efff5dd2. 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/DEPI82441001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936cb0bd26e737d858a68a4bf094ee778b2a6e39c78364c130d2321d37ebc1ae. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEPI82441657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c2ef1d3c9176d23648887c48a723ac92ae1c88f64534b57733d5f6d4408fb7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEPI82436818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16954f7c37edd04ba62580272ad1361b2d0d1ec9dcd4f9888bbee3f34bfdeee. 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/DEPI82432697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99809f3b1ebaea8b3718ce0793e30a8fbd023776936b10893e41529c1447bcf3. 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/DEPI82419235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2faa5e1ba9cbd3ce48de15f94c2bc9559f231f660bb08e69a6e2c18c47a7d681. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEPI82430582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0e3a7c327cb5b56099e21a09d47f6b157466f92b3b293c1d5b63d8c77d8749. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEPI82413575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d3f29d600a37235e6a05e208a5650de427cc5ba5a881b844d69d07bf3716d4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEPI82414136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b973a8ff30e9d463399657aee1db0c65ca9ebec71188d5157de85583e07ca3. 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/DEPI82411770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5366bec006e7f48b81c2143f9d8be86258550aa86ad40f066669d9d7a2caa7. 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/DEPI82410377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0b8b31614e1f6e9c9b9168e9b0512526820b254864f472a8c6995c42945cbd. 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/DEPI82405756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd628e42237fa38f2eb34cbbc20c78d09d34ac72c134fc23e78c736a17909ed. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/DEPI82409124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037c9dee31001c8614a25a04dc4c582603e5d8d87f716c160f384ddd24ad5e3f. 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/DEPI82401937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2915a6dd9651cbd8c41cf1e68c0161618ddbadf2100514a941ce80e849a06a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEPI82324041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e8cc0658253e4de391c1c88ca62e26e0a41bca1a5a68714d273b4d2025634ba. 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/DEPI82324512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc4931641feed0eb68405f4b97d5ed2f682f66c3c914a2adc2296776d477e28b. 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/DEPI82503072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa0242f11befc6840aebe060d28a5967c79c7396e0e91df6ddeba4eda8fe267. 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/DEPI82500312.