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 0x0089f4ca746ebbc9d72396b8bd0ab6ba23d21ae8be4d8e74fde77497d9faddce. 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/b41689eb-3dba-499e-a7b9-7accafedfc42.json and https://artists.proofprofile.net/proofs/artist/b41689eb-3dba-499e-a7b9-7accafedfc42.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 0x10da09ca7625914718a7891d36e910789add2abfab33b5ba0c0312641abe6aa9. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZNWU2440401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566313c03c158bbd331899ede833d192fd30e6e009dab2be3093ffaa30eb6f6e. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZNWU2440402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450562f44779dfeef80bc3ed7781f051da570d704530f93bfdefe402be6906aa. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZNWU2440405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a2d07189207a8339fd6f77f7d3159b1cb3a73a39e998820e70484693bb8706. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZNWU2440409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20daaec39c686a4068f2f7a29d3d196e47919ec4296363d1ee77e06fcb7e2918. 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/QZNWU2440410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522fa3d6ea34d67e465a68c4cefd22a40b53a31fad16c95acf4361425eda247c. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTAS2438611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e613faebd19671941ea3f63f82e3a4760e98b321256d17679dbd63eb99436f6. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTAS2438612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d000c2806d06630d8998db5eba1358ca65bcbd29b9cdbdad69817430d26b7d. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTAS2438614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde30c0d717f13756e63240b09b9017e15ef1f205b2d8b7bebda88a8ebd64b444. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTAS2438615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b8dfac44bd8930560011bc3ea7cd59b900beab60a8557cc73bef557610d551. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZTAS2438618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b162daa1065699944daa3462976b3434ec93c6256e37e6dd29954c3d1c4c164. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/QZTAS2438619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678fe427b52897dc6934258595cbd0a29de5bc321f82f1f8f5e7c644439a8eeb. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QZTAS2438620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f8ebd3687e83a48c7fb6e3a15ca6189e5ac619afeb4d0964c3eca367ae06a8. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZWFW2493439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293b32d1365c174f45f6ae5015cca081fd95970a23966f43a0677698ac191af5. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:55:44Z), 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/QZWFW2493440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0284efd4431b9906a0dbdf7a8d195fe0014c4cd246e3408bd325b5bca3ec4f8. 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/QZWFW2493443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5ee555228045c9999756ac34c9287ea109975e96dba79c28c2f975b0fce73c. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZWFW2493446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0351ac00947b0ad62c32a1d5e9244b5f2ac18317007ba090becf409903ef69. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QZWFW2493447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c2dab475c465fa86bb98e204d26407d2e62dec0c6feaa41dd942f140e8c2c9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZWFW2493448.