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 0x7406c9d3b1323d5d45be438714886b09fed28fdf7add42dcd8939c7cb71d455f. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8223143d-d4ab-4e44-a64b-7970a6428569.json and https://artists.proofprofile.net/proofs/artist/8223143d-d4ab-4e44-a64b-7970a6428569.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 0x90336f01f0c2176e9fa9a3791fb0e7d5deedd29d2130bc698a7f6faa6edbefcd. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:22:17Z), 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/CBEYJ2400852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe1e868bc6fb6e79c461a1666ceb2c0f7d03f9c1978077a5611aba2d157cc9a. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CBEYJ2444441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6a5f07a7b33ff001d1115cebd2ae483070f03cf1dc6330aa262133281ef809. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/CACWV2505303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb711387f39153450b4044493eca539ca4d35dcbd1a73272f69f4782e3e5b2874. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/CAENV2534747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d6f50711bb7412f9bc66a090766ba85b8dc883c887a2140c751dcc8444dce8. 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/CAGOO2519781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03507807209e8a264df6cd3c6eeab19446aa98ca414c3d0d0e8bcaf33f31851c. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:28:23Z), 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/CAGOO2593295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80189068611ca726e6699cf88a211c16754823cfd00b94331fcdd7efa1ccab8. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/CBEYJ2554473.