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 0xae75b879e201e092ce5d84de961f9f0d5a13c83cfa8ce5b0fa5fe33f3a0d7a88. 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/5eb875be-17de-4d44-8bfb-0d90e9635cea.json and https://artists.proofprofile.net/proofs/artist/5eb875be-17de-4d44-8bfb-0d90e9635cea.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 0x3783648dd68e839f2e926bb3b88b97481209d7070b6309b1e8e7b90d2132941a. 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/TCAJC2427137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b992916f413cddad23a70360b925d652a8320d1a14e920bd161e4dae9984578. 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/TCAJC2427177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c17e719a46a720efcd986a37993c6da0b00b3ccc9fbbb92d318b814d065763b. Chain 2 (Bitcoin): anchored in block 958731 (2026-07-19T12:35:36Z), 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/TCAJC2427187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4216cefb42e1196b28f78627c85a2d04248c5d98ddcfc4c3ce33e4be427e2a36. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T13:58:35Z), 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/TCAJC2427267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b46783b2fe19eae5f1828e683ee16c18475aa4eafe92b09e3cf35b3e351dc99. 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/TCAJC2427301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f7f41f557ea4af0779aed06228b4dd823ff2ecf7b72e145cd521363c0786e67. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:45:10Z), 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/TCAJC2427068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34455cfd4f0f5df89bb062bf59e250619b9b6024ad63d9541e1d53c88bc8c1de. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCAJE2574564.