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 0xbb75414522a9fb1d2c201bc879d1c38bd5d5c398e06c599f5f916653f27c852a. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/34e69f48-1c77-4281-b271-8d20306fc170.json and https://artists.proofprofile.net/proofs/artist/34e69f48-1c77-4281-b271-8d20306fc170.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 0xd76e8744d32a2baa9f3a93dd2f2985c8dfc46690ffbe299b5c9a0a134137b57a. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:06:23Z), 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/NLG660400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccac872a10f3366668fc26c8197c28333784f57e76f8f960f0bab3dcfd73253d. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/NLG660400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07cd9f314eff09085144a126e4c9cade787a0151f05652cbce11b56ba9e2f45a. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/NLG660400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df6dcd2c7fbdc8f16858066f78ac185ef882654e3b94c45e44594344d8514e1. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/NLG660400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96fec5a44756369ef6e949a9e605b3b3bd35cdea59b77d1d2c53d04af33b283. 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/NLG660400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df56718358121638f83a9814fd4e6f100a3334a570727a93357671b3a397622. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:11:16Z), 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/NLG660400043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e09c6ef786c78273a2c9f1a05cd7b46fc415340a4c42d203b39572ced109cd. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/NLG660400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4424057732b502d73b23ac0e8b67413b6b2b792caf352b01e528c50ec623bf55. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/NLG661200165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7668d0dc72ea266b7d09510b7df09b90916d1efeb5458f38a46f9e1108b110fb. 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/NLG661200170.