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 0xfa8eaf5682b41e145165d35e169dabf8804d5a13fb5c6ec985273f8ebe40f6c2. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5b09be9a-5b69-4453-afda-eae71af00d77.json and https://artists.proofprofile.net/proofs/artist/5b09be9a-5b69-4453-afda-eae71af00d77.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 0xad3115db72f53462802865ec015ecd0b4a2bf788d001beb2f3f72644763d1b05. 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/FR96X1876904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1200ffc14470f85db9ed597869d814933326bf3b57a4c733bbf3f8848ce904f9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBKPL1957060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5fab207c88a6dff9a643eb0bb7a430370d251a38333b9ddaca773af9bdf1519. 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/GBKPL2025496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c3d8dc9f75e7966775e74b185b3ba11a2da676ac14a77d556a9a8fa77ade57. 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/GBKPL2136863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31ac50bb8397279fce8a5ef9e287a68e5ab0b6fa8299c34a46420228c52fea4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBKPL2138060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x175bbcf758dd8f0e8bcb65417e26a0976b03d70faf4b150c9e1239eb30c16cbb. 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/GBKPL2021138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17ee0b4114adde8e6267e89b601ed36eff20c7813d5136f27fc6eab0c33f0ae. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBKPL1976578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa53712a065aee583e04c75678625d2e4f6e15ff0140bdf1ea810e3b616e7054b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBKPL2138061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0df43527be51632bb00b3766c57c253b632fc28b1cb92f01175cf88e4fe67f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FRX762164447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff635b20befb5890029434a1fd2829fc4fa7b312febf2ccf0a8dd3802bf0e709. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR2X42223365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0df43527be51632bb00b3766c57c253b632fc28b1cb92f01175cf88e4fe67f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRX762164447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0004973193dc146ccc5aebb0bebd393468826734607cfca508f4fbff3c9063f. 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/DGA072243475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602253ecd3ef8acd0829e9d1128781d53c1b0928ba5a8f93d9028af8cd3a1921. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DGA072243476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff635b20befb5890029434a1fd2829fc4fa7b312febf2ccf0a8dd3802bf0e709. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FR2X42223365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb287f024f51ef7224ce435db58c9d6f757a2840d69dd0d03a790cad79baf39b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DGA072243478.