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 0x116e2f5db1127a2169b3ed0dfbfc04b207897106ed0a8532c3ae1bcaf151cd10. 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/340e6df9-040c-41a1-a9b9-0f186e1928c9.json and https://artists.proofprofile.net/proofs/artist/340e6df9-040c-41a1-a9b9-0f186e1928c9.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 0x098e0eb6e21cfe5bea5026b456ec7df4da9e64ead0a8b23d151997706ac02d07. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/CAG461600014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818aeda753ee3bcb2f07cc46daeb67b58a99b216d66345f81f82831f157771a1. 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/CAG461600015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1456717dc905499a2a76fbdc219848fbcb616f38a610fb42422b96663ca8e71d. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CAG461600029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7459ab1a62749da346ff4dfa2019c1f58ccc43f7d3486d6544be19a2d284c2e0. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/CAG461600032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e3387a9d0d44c0ffc3dbe9e4efb403a3703dd88f176b9c5d0d2d7de252153b. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CAG461800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d4fc6ecb121405b156526974e17696867cfc8e95f0dcdd685a00fa098a1a6c0. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CAG461800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04b8f86c85f038f8a125f142a3d0d71384ed8d22b19f92a8164d53026a68462. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:35:09Z), 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/CAG461800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x481e1103404c6b995aa5d31495082509628d7e00ee5e2f9e4ec9b42417a57b0b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CAG461800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971331308220c8f1171e7bf72b04a29029de2ea26fb7d743a41208757711eabe. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/CAG461800020.