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 0xad2fa5d9cdef46ce08d1a64086e0a712c62a322b3142d408ad42f81b34e62744. 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/6dc630e3-27d2-4e60-8a62-7eb317f23d11.json and https://artists.proofprofile.net/proofs/artist/6dc630e3-27d2-4e60-8a62-7eb317f23d11.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 0x67c93fece578b33df1fc304a5b3dfa97183a7baa83117f2aa098a48584ea367d. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:08:01Z), 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/QZFZ22373062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca6051cfa9dbd4c9045eb848a2ab16d87410b8533a28b480ce4aee645b5df31. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZFZ22373064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77145f4f4a7e075568ceffd965b0343f3eb879e1013942e22738e1c0b00898b6. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZFZ22373066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a71e4bc8f2b975e82d5776314622bc6001f6e94a4e61a098ec151e61833cc6f. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QZFZ22373067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbeaa7f6e922ff4a9cd290b3216712f73f580305a90b0dda920dd543efd1e6c0. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZFZ22373069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f47b525bd9048f8a6e21b7eaa5717462c1187a7a5523c26f055d3280483fee. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZFZ22373070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6957deb4aa9f930893daa5a7d69aa7e185e7b77d832c6be536770493ffe84ebd. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZFZ22373071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a5b7b3b50ca2ffb8218aa24578fc99b5dcca42247572f865536ad2f1ab0ad3. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:08:07Z), 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/QZFZ42344454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e7d0748862ba7dff5e0a61228cd771437c929e6e967d9225386ea0627bcb39. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZFZ22418633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e8685df6371a3192360a3c377211f3c0d4757dadaaad083b34ad4966dfc63a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZFZ22418636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6626e6441899766fa5cd1d0f13827b4c134e7c60b946611a4c96506b664d2e16. 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/QZFZ22418638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55fbe8d2612c280904a2f6644ee70dddeb17b78478ecdaf47ca4760bcb549c13. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:36:46Z), 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/QZTBF2483154.