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 0x1f9024afe5661b848daf02a2626e0a1a88fbc83eb61aea2683647d0faac40cd7. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/71cf8caa-6f75-41d0-b053-06f02053081e.json and https://artists.proofprofile.net/proofs/artist/71cf8caa-6f75-41d0-b053-06f02053081e.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 0x505f99d6e6fec4875e1d72c4bf7f209e9990f46fea24bc6384a5115350dfe2d0. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:04:41Z), 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/DEK501807802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c12d30007722463b1756925f0c4d45ff5fbb19a65292bb7ee56be8bfaca587. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:36:36Z), 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/DEK501807805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7323d7578e80f076af0d7b21e6803c019134486a298f1fb3cbd49ebfcb9c47. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:47:08Z), 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/DEK501807807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142270e5e6a56e0665c721802882937639bf76063906a2345b86aaaccb460650. 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/DEK501807808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f6a477e2888d99d5b854358bde44f4de1e3254893d60ee95369fad67dcd70a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEK501807809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb098b4f24667e1c4dce786acbd539032da447158a875f1cc578d350ffdecedd5. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:23:22Z), 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/DEK501807814.