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 0x76b9919af12c1645673d619e371015cb81bbd922c7cf169fb404d46d55cf17ee. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e3462892-cbbf-415e-8b51-8bb9605c72d5.json and https://artists.proofprofile.net/proofs/artist/e3462892-cbbf-415e-8b51-8bb9605c72d5.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 0x13a1049f1cee4966482ba9a290aec40d1bd152cb2756f7562eca5f1f4898cd62. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T22:36:33Z), 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/VNA0M1906292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc312ac9c8e376def9c6e8a1131d4cd35e45c2a89affa714adf6337f464961e. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:24:10Z), 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/VNA0M1907157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c14cb34db226f2215b94ca2906eb44f4f3b028278509056161fb4b8bce14d9c. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:42:36Z), 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/QM4TX2473053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba802c1b1a42742adeab6eebc3f6169dd7383d33ae4979f545c47f053682ca7. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/FRX452114036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd426de6154dce125afda8d6d507f2f7a7e67ffaeeb83f49c116db59c6cd781d2. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/FRX452100577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x349ace300649929185ec0e949e693302a3ed3da84ac5cbd62866677ba958dc11. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZN882304904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc43c3716204e889e23d05f99d66a2a122a2ad239cee0165288064a2c6e0487. 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/VNA2E2210331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf89163889b796f37bb3b2aabe220823897ff6d92806daa3a665b843c5cbb752. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:44:34Z), 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/QMDA72446670.