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 0x7367d992715be5ef503361a63257d5633c86e4ed8ff4a24d3b31e1411e9ed9c7. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c679b84e-a55c-4662-998e-46a494cea564.json and https://artists.proofprofile.net/proofs/artist/c679b84e-a55c-4662-998e-46a494cea564.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 0xf42ce8b93ab1a971a0c562cccd686e11b422dda2cd12ce5966da847ecc2792b3. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/QZDA62215813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04cde83183f8bc5d1af6a7a6d1dbdfcfc76fbb8a5dcd6487cd709ffc3262ff7. Chain 2 (Bitcoin): anchored in block 957608 (2026-07-11T21:00:50Z), 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/QZTAU2100127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b3ae5fc1dcfd887ea3d39963407042cc46aa5e2017c155fe78a805e1695878. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:13:03Z), 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/QZDA62215814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaccb4d9902143579d31ca17d9aae72f8bc4d6cab1855f760670a0b7dcdeaf2ac. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:58:14Z), 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/QZFZ42255919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71fe4168135b48965809e3e34a402f87dbeccd389428b6143e4c9140b326786d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZDA62215815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d37ba6f412c1f91853962e47a9aa6eda0c34ab89608a1558177c0ee1fedf25. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/QZSYP2232620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f3cca50b5ee06fee7c770769d6d0b522ec75120d0b88e3b36d2fc883512358. 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/QZQAY2359724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff8751c488ceda1a991cc1a3301c66274301f4f636de6c50ba6a74a827ce93e. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:19:56Z), 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/QMBZ92321150.