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 0x2bc7ea5037893093ecaa43b8b2b899658bcec4a93610cceca5443553687b5d8c. 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/c37a12e8-d171-4ac3-9fda-f8ab596f64d2.json and https://artists.proofprofile.net/proofs/artist/c37a12e8-d171-4ac3-9fda-f8ab596f64d2.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 0x35123a55c7cbf0d41cd5874db70d69df95f5231357611a56fb3774d73791273e. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TCAID2413416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10285d40b8a6a24a0b2174a841d32fd6bf247e117b5b46ac2a08237ba709a389. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/TCAIH2411762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4751917f2400bfa717cb90407449e9cc372e72adde2a21481780b3ba08d3e491. 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/QZHNC2218168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8af373101e8f45f0a9fb41c8557ff0eff92e6d92c7b7ddd9d08e4150b061b1. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:31:21Z), 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/GBLFP2257957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e5b6bd44dfe9b66c5dcfddbdd2a156d354f7e9d90849cdfa2bfe939b81b88e. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:10:19Z), 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/GBLFP2264749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465a56c7ef94c4053cd7f5ee12b0654a5433e13b6069ce251e428f5e37bd9b13. 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/UKXN22207092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a423aeed6878ec065335d733ade2b4865aa65f477606721d3c88b7d5564c8a1. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/UKXN22232351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019989512facc182a2aba66442921d41b82de9c59dce7c08973cbbdd214f5293. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/UKXN22316837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61cd175fd0485f77dc1291e89f70096b78a056ea3f75fa6346b639c7de159d56. 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/TCAJM2535524.