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 0x93523f7d61a8332401a29539101ba25714ffd0e079895ef3fba8eda5b49055a5. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0125daa1-ebea-4589-8c3f-83c2f2b446c4.json and https://artists.proofprofile.net/proofs/artist/0125daa1-ebea-4589-8c3f-83c2f2b446c4.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 0x63b3e18449a5f82eb53bf92760c4eb545d6a56b30a65eca44d5f4f4e924ff90d. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZNWU2044720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a5ae77f03a854bbc5f3924e547de847eadf0a832c4472ca16cb3bd0b039f56. 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/QZFZ72143582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45cd054cdd8ff055e3a5cf74d8e154ad4cacdbf4c4121d977b2c5f752c855f6b. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/QZDA72132293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71b8116616d472c445e3fd08a56c227324d0cffdb72d92d3a3ad5476ebb5952. 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/QZES82133253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8706088146c38b4d200aeccc893ee401c34ad9fdf754157d14e132f524fd0642. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:49:14Z), 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/QZHNC2181247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620e83917f5a120dcc7d5a7a8d74d3854994aad83591c1c9b8133ab9d009d7db. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZNWY2192082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dbfc59b7d93cb02184dfe45066f8e90f85f65f8f22beef057b27478080324da. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZNWU2309962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc27ddf2037758847d500315ebc651cb96b067ff513d8577ac2fc29ff3fc1ab6c. 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/QZDA82546495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0fe63cda164d81dfe98c308cf79efb93598db3db247b02cffe70e64b3ad03d1. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZES62595367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966a3bf0b4c131162ccc9caf203bf1be4168ea1d258e12a6fb5203e5d6bdd647. 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/QZHN82512021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e9a96f567b2769f09990ac6261307c8bb815e7d53a000dbf3729aa8eeee91e. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZES62596952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41fd72d71bd60599c43214f8217ee1a2602b830446253fe497ec36f1d5ef44b. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:33:17Z), 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/QZPLS2595239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6da65a50e48970c0748cd7280db406fd75b095664133cccbb9eba8080f35daf. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:08:07Z), 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/QZTAT2522369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad40e4db9ced624eca9b4068fad13919102c8b25bc21cc76552726a8eff869fb. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZTAT2524531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d217ebb2122fc3d85b2cc1b1c0d7ddd78590fa9933ae99ee481acd26b901527. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZWFK2597506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a525a1a2b706a758edf3301e9fe3541d86f4238b5b7851fc3c46beee0c3d2eb. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZWFP2549829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb61828f7aa6258b21f8eb39f5dc3f075fa46ffe95e79fd4e9cbc34eba603471. 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/QZWFP2549830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03607294033f74d8be2fa07217778b075240fdcb851b714d92f8b292e98dbb1a. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZZ7M2568510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441d4cbd6a47f88ab0a8fe7ac06cd549bac1601cffb3a35da5cfed6f299f4764. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZZ7T2561051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86036ca4eabb4f12eaa312afc213e89cdb46230861c4e2828c13800b07f1f36c. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZZ7X2540405.