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 0xcdc95de6ed4e1106afae8cc47330325281a721f28f9d44eb8959cffde1ba687a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/38e16804-fd88-4947-9b57-aaa3415cb0b0.json and https://artists.proofprofile.net/proofs/artist/38e16804-fd88-4947-9b57-aaa3415cb0b0.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 0x80c7e1cbe47bd02af6c37b984a79863e8be7fe71bd6ae28303999a0fc345b756. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/QZK6N2451916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be7ecdde416f4c49441c9f4e24305658d70371279a00e9c693297d73a117ab8. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/QZK6J2459270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be7ecdde416f4c49441c9f4e24305658d70371279a00e9c693297d73a117ab8. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZK6J2459270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2afe3d461e7e9ad6a41bdf4ed89f9e63b1d8c53c179fa5c0010aa6979c3a62fe. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T02:36:06Z), 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/QM6N22481585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f8cee3fce46cfbd749e94b98d182d8786fb95873a685694edb950b7c8afa33c. 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/QM6N22481591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec0bbf53e47e2ef1eb9158c5d6ca873e1370615100d1f97e60bc4af74e3732c. 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/QZZ8A2429734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a83150758adff690f5fae40766c8ad791a3a65403be7a1714077779a169402. 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/US3DF2544353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceefe89c8d53924872d5ab55e024ea399883bfb9db18c79044e02f4a30fae01a. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:38:59Z), 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/US3DF2544356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f42360d8086878c439bdc982b976df051e26c5badff5fb349380d7e107e3a4. 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/US3DF2544362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745b9ea00128a8045851fa15da1f291fc58b5d1a1878343a95c684209ed3d98e. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:27:34Z), 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/US3DF2544363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f227c8e2fdabebdd7ed38d0bbd03e6ebe41541c50155d37309452846e300999. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZTV32534805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a764053d430ef127611e0f06581ffef49d0236a7cdaad953d4bd67f257ac87. 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/QZWDD2538696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d97dec31d6dcbbbaaa507a61d58fa3c786e1580ff25bae95b0f2c3f6759e179. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/QZWDD2538705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345a05b8b3122d5d21e6c38af3625c3272f45930bf0f1248e5ab89d37981b883. 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/QZWDD2538710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f62a084836129905390bf6b82ebc5520c24ae6ec32f3c9b50852fefb4a7b315. 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/QZWDD2538681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0471d554af686b9a49ee810ffe24ab72803c08467d385e969b6e70614420a0. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZWV32577590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171719fdddbb40ae998733a3a5284203c313237410206cbfc24eac452f6e9514. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:06:52Z), 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/QZWV32598731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9201341fc58ed846ca066550d4828792f9de9d30fd0a6b60b536cdf32efbe4b0. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:09:14Z), 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/QZZ8A2522409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb1815b3ba2bef86144583c5f3337223a186f791427b4e5c3ce2206be7b11b3. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZZ8A2522421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b708889517c083457641e7631ea7e80de36d6c163a88f32e568eef74b70d22d. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZZ8A2522422.