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 0xd5c9078953df17213adc1b09f7aab997996628954a4b72f7bd3abb0909779ea0. 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/f92fd7b4-d604-4ac5-bf35-1e178fb77fee.json and https://artists.proofprofile.net/proofs/artist/f92fd7b4-d604-4ac5-bf35-1e178fb77fee.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 0x82abfb9d052b759ebdfd9c062a8f599785641e5a128f20b892c8ebef3b2ad94d. 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/USHM81943816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b44a3892885d83d5ba3cbde3fc6446def9f11466ea9d4526f3b2079cb7d8bad. 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/USHM81943818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf17bae854ffd4c226e2991c3e4f7650a12832cd5643a69122066971fb7466887. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/USHM81943819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa3f53adb56ef7a3c570d8c212b9472cd69f8aeb71c01ad520f2eaed289d83d. 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/QZK6P1937163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74353d8514aed279d78b8b395fb263e9a43db60450987670772215130dcb7c0b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QM24S2000800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18d2b0841415976067d355eede345a075d3bd52caa62ad80fbec90a4d673ea1. 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/QM24S2000801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b1541265265aeedbd0f42809feb91af7baea6f835fc38afd43aa6ce25a3a5f. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/GBSMU7653974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3ac6a7f842d023b956a879bc7a56cdec636840c16921a31b1c1cf8ec80254a. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:58:51Z), 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/GBSMU7653976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6137705cf2d460b2e0b1a9d67bb3f1a9b576d69a351a77dbff211e94b9aed602. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/GBSMU7827639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe016012e9f22d2579ab6e21a8beba602758e3a281750043a09c64b18ef0db17. 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/QZES62080610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd612fcef116bdd943f8ca028905ecb4f79da2861432e2ded78dc99f957ab03. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHN52095111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe6765056e60455de7d462cf243eb4cfe35639fa50228ecf8a2dca2b35d1f23. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QZHN92067910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1bb5b6b00d3cb79c0eabda9616b2d6562a7ea75d1ab59bc696fd769a2caf756. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QZK6G2048397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe702942c3c1d7dd7628c68b8c3721aae96443a78c001b26e8e56c69033e82826. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZK6F2014077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5012bce68f222398cb23e3dbc543b8da9c9616a7c4c3f3cd617fae31f33764b9. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/QZPLS2036591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d7e76999fdf88e052ff060b1f2ecc8cb8ffd83606543f353f39afd8093d901. 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/QZFYX2173613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc303c93400ff53a0a8fae8f7b501afaa8282c5af9345f09787efcf4948b14a44. 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/QZFZ22168898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47173f18a755ae42a14f09a4f5cfc5931b7333a77daafd7b3713474ab8b46a55. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZFZ52137918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2f38a276b3bb8a18bdaf6323962355bc335bb00614a9a9d9cf52254cf47878. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:58:04Z), 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/GBRKQ2190314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4640d4229302154a453584b8f4db056bd6156dbce0a0f3cec823d74817bb23b9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZ5FN2279820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472d14ba44bab75aa826f9e3d739ca339b77ba5519a94525f57c0e81876c438b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USLZJ2265121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23569917cda95390fbb9fc17aa68c2737973c2202723cef2736abb02f940cdd. 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/QZZ8A2422213.