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 0x9c295081b0dcd15a8da1bdd7454192957e5f3a382ff1e2f75f0a5ffa0aa1fa24. 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/039da899-e8d4-40d6-bc4d-de94e4e7f379.json and https://artists.proofprofile.net/proofs/artist/039da899-e8d4-40d6-bc4d-de94e4e7f379.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 0xb7119c7a9ca768d806eb363fae9e4cdfe36887cb8e4ab4e50988952a5e4cbf59. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GB45A1600576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8092742edcb095f57883cad3677d3d91ffaeefecfe6bc9cdc43ffafe4afcc28. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/GB45A1700680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425421b9a5206c8bf9ed3ae64e16ff0d1c5baba48627f7d2304b81a91f9cecbf. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:22:17Z), 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/GB45A1901766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f34358540b4e0b4911ae63469e7ac9dd6491075b4c120bd52e93e4c9f8f3db. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T03:20:01Z), 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/GB45A2002114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c337726d57ce78643993359d105b08a3bb583325eb0e964a7a0c4d82362e28. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/GB45A2002174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0f5cbc55718ce56fb80326a51b08b8a58e1592865923d028c4b4ea12bd5e98. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/GB45A2002175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc452a91511fefb5c74d7eb59a19f5a5c1d0e42e26f47b80d4a7c9688098e2743. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:27:14Z), 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/GB45A2002176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x336ff830077c10144d11a9ce7468330f3050e3e81d8ba70a2b9460dc8cc17bb4. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZPLS2229486.