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 0x33edd6de2b864cedc0c05ee22e14a0ee7c6773353da3ce38ecaaa59b84b7112a. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/67582b44-601c-49e4-9f68-c12e8020ee74.json and https://artists.proofprofile.net/proofs/artist/67582b44-601c-49e4-9f68-c12e8020ee74.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 0x8d0f8a2e2fd37c9b8f44e63c10c37a6cba8c65656dfad3b7bfb5498c46c2e627. 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/DGA062301951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ad8ef310be28e93f2d71ffe4fb62e2943f9101468a461c7bf2341d5d2ac793. 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/DGA062301954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x992037cd153a2224d3928acd2a2edc4d5a62a37af70ac0cfc03b146fd9cc88ac. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/DGA062301407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92afa837a98c74ff8feef289a004e0c949f6d16f20554e90afd574b6fb8fe668. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:27:41Z), 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/DGA062301643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9849afa087fb887d804bab6fb6038b375eb25090b05df714b880b110eaaec60e. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:28:41Z), 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/DGA062301363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a94dd2b9d7ea13999e3dd4591cd890788948e6f023a95b943f6951aadbf1c17. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/FR10S2425951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c52b2e4750b19f398053e1be97ab2ba64af404bbaba0096850ad06c84c17f4c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DGA0L2338321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3762d84a1f2ce07f2fe456e10563631a69650b68d8d997a077a7623ae731e6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DGA0L2338323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5393c7106ab8efe6638976ac21298064afcb782efaf52240b553c4ab5a2e8f. 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/DGA0L2338324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6825b7c6026c77c0a920fbdd32b964aac0fdc8b46e4826e8fe90738aed13bd67. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DGA0L2338325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a4846cfc8538d44d82969cf4797fb4b91c5f8aafe1595d8b06212527cd0716. 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/DGA0L2338327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a7cd8d800a40bc8b4b797b8540c1ad0aec6b95337d00ac5818d42b3168a38a. 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/DGA0L2338328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85af5391eef271cdc012646ebffa03b015d1025214bf34129188a9e50a75d0bb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DGA0L2338329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76cf92858a27e319e835bbd73f51a2099739c0390e21e5c76d2a80292aed1d62. 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/DGA0L2338330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5712f9e4843a830972da864098d062d2d54fe01f21f250b2608d9a58b3b02020. 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/FR96X2345186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043ad57bb442bd5c9010810d814d0ea64bd870c9aa30cfd62a60ebabda54a80c. 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/FRX762307937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f83d1d3f172169494e2652eef0eaeb229e2e4b14bfd1268756822b0a0e72bc. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DGA0L2338322.
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 0x698f558c1f49345dffdda195e90b09ef8c17c5640f2efeeda1c0248c8852af81. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/DGA0L2338326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb852cb64c50632154f08acb83bdf2fd82d04624f4d712c16be0217c1e88caaf. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DGA0L2338331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920ed93339fa7db857615ba68818afa246f5518e065cb0791a6c5d3d1f51735f. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/FR10S2336532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72b1ac4abb925dc6388daca219bc991b6dcba083a489b188ff84b39e382beb3. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/DGA0S2463014.