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 0xcf2c52490598650a1ef15f12920dfb7fd5012ae16295c8be6246365fd9451af0. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bb28ff48-e4a2-45da-9c2e-8cc054a27ebe.json and https://artists.proofprofile.net/proofs/artist/bb28ff48-e4a2-45da-9c2e-8cc054a27ebe.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 0x46d6b0a5ea6cf5f1ae31b6fb7c34c0da0d5806efa760e96363cbd5004fb152b6. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:56:40Z), 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/TCACP1692724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8106cf32403018c9f2c7be6d1f9d95ec08c5d62eec6ef7906fba8f19e68ec1. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/TCACP1692728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed6bc975c380caca514f7a2d592fc8f0d191f9354d0edfb15ec8d5bcf87511a. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:45:05Z), 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/TCACP1692731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098963b973b13b1f0d94c6a1b4f611a6effa6aa5e6ae3bca136cf9287304f00d. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:00:44Z), 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/TCACP1693029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f7d8c4cbbeef72e86124846e280708cc3a624ee3ea2fe1e4ed478ba6eb4e38. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:05:25Z), 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/QZD3D1800003.