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 0xfb4bb06ed49939404df6f4782113b5ac0efc14a0d261876e84516b57d2668240. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b849dbec-ddb5-4ab6-973c-f6f364d76f5b.json and https://artists.proofprofile.net/proofs/artist/b849dbec-ddb5-4ab6-973c-f6f364d76f5b.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 0x0f70416c43ead4c51af0a713929ccf18b3c9f433e6212a711978df52ddd365a7. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZW9L2416192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706e3f28eb8b0c0c2a9fbf40e12a08cad945053179728e275546bb60c79d0608. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZW9L2416194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7511259ade46ebb69092cb7da0afe080d837d444657ae4612deaa996fe144c2a. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZW9L2416198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf36ab684242dd520238083501c098b2c80ffe9a0ee3ab7f5952d765707620ec2. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZGLM2539820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4fb1e3d07282695f00543ddb76bc32f76ecbb6b1241a9fabef581f538915b57. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:34:52Z), 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/QZGLM2539824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943eaf25f4a2208e8b64f80a4f6d201f45fbc30332508dda80071669e3f113e3. 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/QZNJW2533522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e9516c0b329b38dbe90783be25701ff690c539d83a6330a839ef55eba0632a. 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/QZNJW2533523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10069413eed34c98ae830afec7a18172eae25c655997c0d3d37cc255bc83ad9e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZNJW2533524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e9623bcba01de229d40b1f5818b671a0fd6d9b1d7fa43d43e98f0d4c05cda44. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZNJW2533525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371c281ab9a726e20ca98805453bfed838a938ecb0b158d44adce7a5278f5404. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZNJW2533526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb1ffadc435751a0193bbb79837c5746fa5d216e118de8ba9400474958b9b335. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZNJW2533527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe044e141d344bb3220877b764076d19d682baa976823ccf2c04ddec4bb29f125. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZNJW2533528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ddb84bd5f7ebf7e0751970050885b7733259f74e863418fd8d3805125643cda. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZNJW2533529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda0baf9ecca7cdb2d1c9970ce98d89404ff4b62190eee5a39564cb08bc948d6. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:34:56Z), 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/QZNJW2533530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf115f4602f13e015e576bd9ad3a4137051d95ef50e87267cb73c4d50afc0b8a0. 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/QZNJW2533531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd46407d0284807e9c1f0cbcb99d1e59efd32143e201b4f240d2b0350d3044a9. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZNJW2533532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116315da9ba12200cdfeff43cea4a4b2b02634ab6b5ad78d941f5a8e8cd7c187. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZNJW2533533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa120982995500b8ffe86efc3d5209ac06b78967fb7275c03b8c1e1abb46a3575. 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/QZNJW2533534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ac9b9c319d5fdd5ac0c53b1654f692aae1bf2f56e511a15dfc40f71f672e49. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZNJW2533535.