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 0x3283004ac278e7fc945b08cd34f337c0cc11b8d2a54c12617f5e33945a4473b4. 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/8b204772-a873-4a33-8d14-adacabe90351.json and https://artists.proofprofile.net/proofs/artist/8b204772-a873-4a33-8d14-adacabe90351.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 0xe68350beddbd9aafc77696f8f57c2271671348ebc81bc367ddf9a50581dab23b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZAKB2155703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948418f82527f6d95cfb23e818b12a56f084fee90456ee238ad4d70249671d1e. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZAKB2162608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f88fcf5dd5b726fb810cb86a33476a2da945aa6a86595df75e756594127ea5. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZAKB2352187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a779b1e700e977d3ddadcac787ace94b86f8459f22e189969e7a244061e806. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/QZAKB2324777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b167837e41388210f74b7e062e46a7674b06ee7096b8693bfce4fe80c2e28b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZAKB2335263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5154a3411b0ca415764903e04ff8967e6dde4fd06375e76ce0cacc89ed3248e3. 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/QZAKB2346477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0efdec06d72c9c7b05447b17c52c5cf573415683ad6737ae545ba063e9c33269. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T19:53:03Z), 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/QZLBC2414061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc0a5b1de6962e2294a37b6c9a3636c0492b534801837926a69f4d26cbc3f3a. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:46:15Z), 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/QZLBC2423991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78757f69573cc6ce8a18d63febd88ef5683f1aef4aadd9058b07fa1652fa6a9e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZLBC2427032.