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 0x9dc5190b47f37dae52bc9ad0f903be893ead2f3c49a51e4372a8f0fbc84c36f4. 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/a2186541-aea4-44c8-8d30-78fc102eaf4f.json and https://artists.proofprofile.net/proofs/artist/a2186541-aea4-44c8-8d30-78fc102eaf4f.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 0xf2ee5f2569d8da3f884f16bada9250bf3a416d41b34119e7ce0b73be72f83d62. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USHM22053505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee86a5d19282fd8d1e26999272161d67c4eebb5eb901ddabba76bd59199f8a9c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USCGH2109890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541759b1fd6c05590763e353ff786e48d3678906f4b80d4651142c6513fb4e40. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/USCGJ2156661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf0b03c640194b6ecb5335fd57b730de2b5116f88e62536cac8e046a5f8ef2f. 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/USDY42122153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25933d7b25234c975dd946a2b5c9d22cf3bf7d4d5a324db3e68d126c4c18bebb. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USHM22169079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be77ec7f39989e8caf08ce8fe6e8dd04f8110664a9151be7e7e106c0b372590. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USCGH2332654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2067c6aa1e3d7ac154487a03957c8e7f5b1ec13de4b01e921fbb87a268c374. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USMH92397576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f367335feb508227f3d1e945eb6f3d4235c2e55429bdd51177ea24f8ef3822. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USY242431283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5dcfe32e5ccc9d494bc17c5b27c7756b2ebb17297759c4940499cf716d0c232. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:18:46Z), 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/USCGJ2552380.