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 0x700ef36518cea3421b5e6af4b500a06fd70ca47420d932afa66a487f8814327b. 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/697be6bc-25dd-42f9-881e-8ceda8c92d03.json and https://artists.proofprofile.net/proofs/artist/697be6bc-25dd-42f9-881e-8ceda8c92d03.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 0xd01e01bafcc1bc284ccc4914851d54ec7c59b1a778a0f13356350de69d1e0b56. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBLPF6682564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66bfe37036c01bea91e9a721f0be96859c7c39f201f1fdca2cd33445641035bc. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/GBLPF6682565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3bea52791af9f4570e9f9732400181876fafdf3e89f830b4404027e84790649. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:02:39Z), 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/GBLPF6682571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2688707a6482426f3191ab16f600de661596969881a8ae97059e6d4a741eee3. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GBLPF6682574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d27dec77a3e4e397b0217a9ef8edac6ae18d21dbc60fb68bc670ed7393f508d. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/GBLPF6682578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d854b5a7fc4dc28e63fda02573bcaa4aaece42f8d389dc8b5e27520451c4f1. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/GBLPF6796783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0344d6d1837b0457ba8f0564dcab2c93ce585c92603e5831e34218e4f0d4f156. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/GBLPF6811044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd695bda2af8f95cfc00c52f01a04f25fad70cd6f6db009a4fd6f8d89bbe3a1. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:25:31Z), 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/GBLPF6732805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ace7fcea12dc76881e45afb9f071390bb062fe091d617c1a2e46bd02d84c7b1. 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/GBLPF2510606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea22766529d2b92ba9e978e051dc852f8b655b22ef21ca35ca4b42f136aa6838. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/GBLPF2521640.