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 0x7fdf3364fdcffdf0b38aaefe98d32cbe89476fbb554bd373eff0e4f9812c02bb. 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/5a7e3e91-1faf-4549-b4b0-7b5887611540.json and https://artists.proofprofile.net/proofs/artist/5a7e3e91-1faf-4549-b4b0-7b5887611540.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 0x85340c337e7f776d5ae3f43dec0348257c43388b859a58de86fdd4e5ee94d995. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:52:42Z), 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/USHM81124755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e792909a8129b4534b70f0b6496ed4890f5b5a595d1cc363718fb05754d868. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:58:01Z), 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/USHM81124760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x587bc2ae94c176865c1595fa7f0f2b551ddb355e5b0ec0c6aa3589f11faf0f75. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USCGH1636054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24365acc45fe68903fe016ae1f1a4f233d7d4d037a143f6830e1e49969e4dab. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/USCGH1636057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3d152ad9bc097fea67b3a8ebc82b9b763b166104b6399d7e648b083bf52e61. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/USCGH1636058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec6d9acac7ff983d5b6a85e70a3cd7b6421660b35609378abe61f96a00f372c8. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USL4Q1949576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5315c2922088a5e4b20a817864ef4503c015a4729f272a046fd4f5232d9db1f1. 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/USDHM1509737.