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 0x65a9d5a1e0f4b4e6bab5184e4f217b7013b327aa5ddfec4fd6420e4cfa6f09c4. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c811bb6e-1b62-4017-a510-5ec9b478db86.json and https://artists.proofprofile.net/proofs/artist/c811bb6e-1b62-4017-a510-5ec9b478db86.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 0xde02ccaed25f58363f4e5e339d9afbd49481e82d4467041b42c5e2e95eb3a2fc. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GB8KE2324118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc11bb4f30b4c0eee1e74cd49e062b778b57014483a9c1b493df894afc1233add. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/GB8KE2324838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256da5c1718768f55e7c286ec7463b09c9fc4772422784b223680023296ab56a. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:58:41Z), 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/GB8KE2327046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac57692131fb6cb82b66ce60f2971683074dcf7cbcea46c9ed1e8bd87e1114a. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:25:58Z), 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/GBLV62306414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdfa7b833391f87f86d7327979d0dd62ec0e63f71ccf524b287b1e3ffaa0f996. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAJG2515458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3327687fc7f805227ebc52b43abf89cc9780bf6db66ea4cc13dcbe9fc9f8171. 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/GBKQU2459062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53129da0544e95cb9ff617bf0257e55d95dee93f64dfac8aa7e93c96302655df. 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/GBKQU2480864.