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 0xac6880a21ec596e89e16b9f4503110f9b084e6568d34d097e742f9815747f8f7. 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/a7e81ed8-19e6-403f-9e82-58f2ba75b13e.json and https://artists.proofprofile.net/proofs/artist/a7e81ed8-19e6-403f-9e82-58f2ba75b13e.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 0x95748492711ff24ebc065528a6776e35c62e48255c980b3a083ec3c7ebdc43e6. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:47:13Z), 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/DEN061902138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2adce4bd56d21034fe4ddcf135593e9edec8605ceee500bd4a84195f4fcd0302. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/DEKS32100133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x557a124bdb52c74eb801e3a4dfbf47606d26c0331ae5853ec726c40d74fc1ba9. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/FR59R2287666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb2fca6ab226510bec81c4cdbbfe367a3a0f6cc331f984d738dbfab4ce9e605. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/FRX282264159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b66ea2cdaf1f2b960989a3cdc6b6a7cc6dc4594ae64c80cf2174c6fd8cfe837. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRX452213029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91824eb41f91fe3ecc273cca2f25dea6ed7a23004cc2fe7ee543962f0943bc6e. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/FR2X42291504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f5c040c966b59175a2cfb209fab6549b9705ab6d9a6d6ebde9f655ecb98bc3. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM4TW2381066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce0c227db5f293414dd8d94abea98c9849d5e74bea36c58369e91b9b15355f7. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:33:45Z), 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/DEN062400373.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc436ef1335639780851ea3eac8e878f32cdb94cd92fcd32e58149afb924689. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DETO31900114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66769437f16efaec4efbd5a675b358d8e4bf644847883084aebd02484c1e06e3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEN061902137.