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 0xb319e14cc14edcec2a956db429a8f4233cf0a6d56c7a55d956e706db3a6ff0d9. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be6aa420-2eeb-4280-9279-013caca48272.json and https://artists.proofprofile.net/proofs/artist/be6aa420-2eeb-4280-9279-013caca48272.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 0xbd0a0e7c48b07de5655d942528552024cb760ccd9e76289d3b0b6f0960e6e5e0. 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/USCGJ2283566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb078f1c15427c9e5d752949bc7c9161bd64394b457e66729018960b122ac3bba. 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/AUMEV2559496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47148f3f43732e2910fce05751bed517fe048f81f170354169ecfcc4a9d13f37. 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/QZFZ42574811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5cd854981c309f5b28e672c8c2efa116aeaf983c74eef122c9c8855a0d2fb9c. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USCGH2546598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5643d6e90c593d0a19216fe8e8ed62f9214222d3934ea162d499819556589d13. 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/USY242474701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95194f4d5337e83f50d1d96b31174348debe270af70799cc07474eec168b9b10. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USX9P2483944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb224eb5badcf661435f09208d1387d4329d01690c4213bddb7c546661ec3c569. 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/USL4R2406251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f785de713aa5a6d7ec36479f8807b30b769580f5e06676aca18c7d468f21ea. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USL4Q2408087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e35a098cd2f673302a6ae324b008cc4e4832db1cdceb8cfb80d19991948a22b. 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/USHM92405794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c240de16030ac988a3158ba863613e58b681757d80048eb0a4aa300b83ba97. 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/USL4R2319683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92fb303d8ffc88f3a49d575214e15b0bbcb944946463e31bfb6af06eb0d5a239. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/IEWGI2397263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c16008aff57908c25c41a136cf394ff10884f370b4a225f03908b1111df054. 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/USCGJ2311337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ea179195081117ecf74032f73339114350e711f06af0db6534847f97ec26d9. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USHM92206047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a878667cbbf3908326b5f8f28f308b77fdb76107f6093f3e1dbf82957dafe3. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/USX9P2399268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dbd3bbdbba408a93a54c9c197e5ad4eb3364d6bc10b6a01f0ed40ddbd921996. 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/USX9P2399269.