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 0xca75d7b38d75c36f8ad85684fec9ab94d0bdc6d6a620de5ba210bfc9655e0ef8. 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/c23fd9ae-50dd-4647-ac54-cfbe3e95aba5.json and https://artists.proofprofile.net/proofs/artist/c23fd9ae-50dd-4647-ac54-cfbe3e95aba5.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 0x432094a32b9738737186fbac42bc61c84ccce30d46312ba43dd8f2e1735137f0. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/ARCBX1400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae25cd82cbc05e8d497e2fd27cef7f59ad8852f67c58663558ec6e5a77a7631. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/ARCBX1400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3342bcaed3296ce73206a69cb8c1a695873d7e7b4abca569e0a4116e5793d645. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:41:13Z), 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/ARCBX1400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990aeb316b4ab58dcf10dc8c5c96d344ad6671b6b669ba32a5d3a08b11d67ec4. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:29:30Z), 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/ARCBX1400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d785c7f9603a352b5072437f711e80e89dfa893968598eee23e8be56087ccde. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/ARCBX1400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca2d4902249620510e368ebddd358c9f4798b87c9f99da8a97dea13e541391b. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:18:26Z), 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/ARCBX1400043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c40ccbff5a2a4a2dbc9625afe0a971e228a4971064a7f8306c6b44009c84b95. 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/ARCBX1400046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd555176db4df245a39c7db023cd78e045d4b8e6d8475f84f1894bb3535f84a14. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:32:35Z), 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/ARCBX1400049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4637e0aa22ea69e9e4464288582b530080158e3e7fec6fea580c6b11595200. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ARCBX1400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3c3bd9e994c7822330ff9612e76363e8dc4c3206d5a896d58300958ed007b2. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/ARCBX1400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a90a79eb50bc797d4d78e593324966afcd53bf1e22d17a5db693143487129d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ARCBX1400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a41b6c3069db876b31a5722ae9e81e563aa5a1b2276b86bba6706c1064c582. 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/ARCBX1400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1603240fc90fa72aa4aaff46dd6e23291b6703892630eab473a6d101c9def7. 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/ARCBX1400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae216fe6916d4abc5e4404f3cce892e123b6c0512f12875ce88d7514e7f8a184. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ARCBX1400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f2232dbce109bffa524ca29ce6a601a6dcc0645c5c3d5859325a598bdcac70. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:01:33Z), 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/ARCBX1400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b07790c4fea3805bdf5d11a33c66cb5e30e61e1efd2374d21d40fa15c99281. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/ARCBX1400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4b95d75586cdfda45c38a7485c48e7773e886292348539b4d2dc512d34d77e. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/ARCBX1400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f509be303e9a2e85964842af28f0c4f15284a430abecfe7c96684930fdb69ac. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T03:55:21Z), 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/ARCBX1400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7d3c46181053b6350b6bc4aac821b630bb77396e7f1a027d993c1b42dd9243. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/ARCBX1400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4b6110a38f478756d457276920c5cf0edcb5bf3586e4c01db0796b37e039dd. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:26:50Z), 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/ARCBX1400032.