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 0xb605cc33bcce222871cd6e04abe1cf5a68a451926f1346f80c5a20fa38f218cd. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7173f507-2d1a-489e-8d64-17ef55118a78.json and https://artists.proofprofile.net/proofs/artist/7173f507-2d1a-489e-8d64-17ef55118a78.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 0x75da3a217c525be4d024c639ddfbb9a4759ff5f2be0ad3e37fef850f5e9e14c9. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZES72522638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711c104f424a90e4cd8e5699dc76215d336550093c6728bc18204b819c7f9337. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZES92509668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161ff0b459c21c0829df189f3dbd000d186881997470bfab1943da4cbe25e4f6. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:41:44Z), 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/QZPLR2519742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89012faf42563837eeca0eee35fe0147388d623a2aba2330d26fb33c167cfd72. 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/QZPLR2519743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6b6bc769f087e6ebbb59445850a1b1cea38d4db43d0552ffb120fca02c3245. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZPLR2519744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5c61940f79aed8a1cad2a38c6634716dc184bf4adea7b18ccaadd6c2aa4bd8. 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/QZPLR2519746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6b2ce7e42ea66e271b0fc9b0796a01a5425cba324f4583cf6672c323a243a6. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:10:31Z), 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/QZPLR2519748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e9e451ae073fbc10eafad8aeb297e2034c9a2700ccac79f129663521ebc324. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZPLR2519751.