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 0x8452e4ceadda24374074a3b5ec51d6471fe90ae9c84a062bca5b89c9b4ed8f70. 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/e70b737c-edfa-4522-af82-526268253981.json and https://artists.proofprofile.net/proofs/artist/e70b737c-edfa-4522-af82-526268253981.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 0xb63c8b899dbd385bf06a0ce1af14bfe55d218bc949d458de618114bf382b95ff. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/RUA011900112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe5dc3e9a547bfee352e0b83f3a53a950f0a1e38a104ba5ff0a6aabcb7860c3. 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/RUA011900125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81633220a2353dbe23deb73ac9ebf9cfa800b199a08db7a1d7f6be7dd75d5a9. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/RUA011900127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea692e90af36074237e705d0d5681603b424fcb86aef1ef4da48fe4e5162caa3. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/RUUM71901475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908b62cc0b58000c163557074b52b53256397b81f0fd51b8eb9c1698b09b3d3a. 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/RUUM72000632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72136b4b7646c00c0cb53e686485e2e7617813c601c125c57af88bb12279de61. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/RUUM72000635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73edba2e91542d3147007b33dcef45a659ad5ac0c9c3f252b0bc4c04ea74880. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/RUUM72000643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84726a9d8bbf68f1c6793f074d6a94cab19d9e626c49ff5626c349db847802e4. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QM6N22151246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076d68ffb1305b4d1a9d19607d2ab833e2377528b015d8cfbc95eeb85f81d232. 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/QM6N22151245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd563099fb06e615a20d46572d262ad7f17499be0977f02ccc22a14141487cba1. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZGLM2408560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75da6b21768e3930941123829b6a6a38b35dee1d967f6401a3fce30e49bab005. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNJW2599170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc7c18ddc770e797764d864dc801ae5b95e10cb50bfed4bf3284576cb98684b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTVM2579205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7467d78d208e633e40732ad7b78b5f688c04940a9aa37fbc5334d918cbfbe1. 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/QZTVM2579206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20de77376b762acfc9032ac205eaeb8e5395d007f3ed6611734c4ea54c3be615. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:32:51Z), 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/QZTVM2571169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c4c5c2e0b41b2e662f1a5d8ba4bfd7e5631d6e77cbe61991a58d12bbddb032. 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/RUUM72000767.