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 0xa3f04a42875c53301c37d966fb82d34e679be8dbfecbfec0a98d6183adb90767. 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/cf29fdfb-e8ea-4d12-91d0-bd6b8674c0d7.json and https://artists.proofprofile.net/proofs/artist/cf29fdfb-e8ea-4d12-91d0-bd6b8674c0d7.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 0x0aaf142f683971d4be5dde962ed677ebcc39764d51109756b6b858b298f80b6c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/VNA0M1920031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b6da35b6ca88b770f576f523ced24189edcff13714072c8e3321367330cba6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/VNA0M1921367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370c3a14badd9fdfb158d187e958ece0dd3eb8042ef94dcae779da0d75fcd353. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US38Y2528201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc145e7006ecb4d2a3297b32f4523868b0cbbafeb585a6c436fd1dbd132f435c4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US38Y2434672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x354fb8cc87b2ef05d6cec88d5f45415ccfa219ac434a725c7609dc9dc46165b7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US38Y2429419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed466bacddcf8f5f0ba1fa5981e3f330321d303a52a5bea41f70352419b5f08. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US38Y2425991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5638f968ccc6b2c009631acf9481b0fd7dcf0b51dbfb6c27fe40c6a545918d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US38Y2422149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b96261c27a15001877f82bba59710df02a4be3ee3b0b352f630c6506c1541d5. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/US38Y2422148.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94ddec16713f57410d2cd84bfc77a9e39a36ba14872238214fe37dd5430af0b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US38Y2420914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f24b2baa6898f3723cdb179e8d65ca8d93989f5a844a586fd4c58a8b3c017cf. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US38Y2419030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d73b02518febc89856c0ef8795c5e83a5740c283c8a00ac3afb24eab81d1dd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US38Y2416440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d401044e257d5a091449729c762b64118dd1d971fc33b6a8b50bb5893ea3f2b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US38Y2415334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe740b957416d76a769096e4767cf69860c98c326d5d13583bf6d80969c26b603. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US38Y2414770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda643953f5a33390cec8e9dc8aa860e73843dd56bf890a069c0f207f142ed26b. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/US38Y2414771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dafd4fa8f5f8761d680e472f71c1fc3f8f09ec3b27d072f00d200b63ab4e44b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US38Y2412908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6fb628fc0da69f8666cc8f2b9de096ea0ad39ea7e93e6d4bbdcd2b87b7e6dc. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US38Y2412909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa0cf61637fa52f5c07fc6e5d6d6b6c5ce128cf27d13103ff36832c6836089ef. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US38Y2412910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b01b7d216870fd57dfd5d4268663877408d9c6490b25a240f466e0010a3a595. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/US38Y2411842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29fee42bd2e4d0e2411eb85543f36bac43604a7ee77e470885f7efbd32533045. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/US38Y2411843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f84be06f5ae6969416be97b45091bb9dc49c28bae3916c2dee6672bb294b92b. 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/US38Y2409546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459326ee60869b3722b22532e799dc67f283bc46929b157f93547af75c404052. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US38Y2409547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa215bddcdaea8a44eff92a4bd688cbe919ec5e8831bfb6ab485dfac6424e46c2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US38Y2408679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee1821b57999a30ad76ab22cf0ad8ec01d34699da107be325424eb8658167d5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US38Y2407887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f84a918092c684d8c33fa3c0c763e947af252b1cdaf75b3e70b7fb3f781d4a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US38Y2407769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132fa9613831ffaa445fc342566a69de7c9d6b00326153fc3b76e89577f88824. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US38Y2407768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694a105ad7444a2f67954c8513050151e85776f3d052bfd6037252f9da398e29. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US38Y2404313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6a27ea1dce0cce0cffd01beaf9b458f1e835f5480672d999bf404e381e0799. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US38Y2404207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914c73c1052a5fc08891400c72618158c509f32f35a041eae3fa98f0375bf8f9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/VNA0R2300204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890949c391ce6e8492e4f82280a474421404f458ee1563b84a6234fbfd752834. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US38Y2311973.