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 0xcaad43558de7cc30419b2c4113c347c1a14765010fbd4efc256c2e05ec2462ea. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa8c0cb4-4d50-4b14-b056-0406e3a19743.json and https://artists.proofprofile.net/proofs/artist/fa8c0cb4-4d50-4b14-b056-0406e3a19743.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 0x7e1e648c8c46287c8d48455f2d88f87cb061169aa2b8d56f22c60f20964064b6. 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/QZDA42535050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe48d1580cdfbdbbab1af85ea5ff29f38b9179c9a1587af7fbd2657962799ae8. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZDA42535051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfdadd5fd3460041447f20939ce14d574c25fedb3c3cb3fefc9bbcc1abc82751. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZDA42535052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef191af07d0deabd197bcf318631ef8c6f86376f26850d9193c99f47149f6e75. 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/QZDA42535053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f2c4ade12b305cca87a2fdc065f9ad223b0ddadbbfb780001e1352bb1f8834. 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/QZDA42535054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3e902e2fd7d487ad3522737ed257ccf8936ed115453f83456660c0b88131d4. 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/QZDA42535055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867870fa893940a3f0bfb393c3d2881e6acda2839abd67a770535b4b86e846a2. 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/QZDA42535056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9445565dc2c9f1d5ddcfb39c0a0e65fcae3b8fa0d9e28b97f3847431f7b502c. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:02:32Z), 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/QZDA42535057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1017d3f84631f567853ee2c81318fc800f666017ddfccc933fa3404284c775a7. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QZDA42535058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f669d29949003257f40377e7ed434c5abf321a51cd3c7b5f0b820d1f3dc7a8b. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZDA42535059.