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 0xf7d5fdcdd8339698a4e9bdbe2d3e660df9794115c0f2d5914d8e9afc48f2d25a. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8bff92b8-e579-480a-a7a5-8ec3f72cf9d1.json and https://artists.proofprofile.net/proofs/artist/8bff92b8-e579-480a-a7a5-8ec3f72cf9d1.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 0x4fc1f95067a6b9d8d5ccc92bce3b21c6a1157e948757641f1d829626b49fe7d8. 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/USA2P2229565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fdb3c8a74aba8efb9ebadbd38e8583899af3e004f80c76d97956098f54fdf28. 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/QZNWQ2498719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d91a2a927410fbdde45d42b0b1e7f7ad74d2fe11c63110e0ac4757bf0ec549f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USA2P2349600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298ddc0234278a3f1ceb368c7583b06a5f3534760919d537189a4fa50f73f6ac. 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/USA2P2337768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8faa921399c6ab28ab1c9763bce05384778a092ccda3481f0500bc18e9597220. 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/QZNWU2381656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074a61252e8dede473e7262a3822f203994a3aedae18ae975d08dcc24100fb1b. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/QZNJX2383272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e23dc09e6f0651185acf36a469166ae6526fdb61583a3a8a4741da22b3775c. 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/USA2P2312620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16d21fc6a4ff6ee50373293242b1bee941d46e4a1405b295314d2918c438a04. 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/USA2P2242517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc138c478ff42a21b97d48623f91126c516f539b49903b79668ef92fb5f680a78. 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/USA2P2234945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc9f3bb579bbbc2697adcfda5d1299858dd47dbb55a7903af6252b0e3c09667. 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/USA2P2226407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b6867a5252b1f3d954d65838d43c05d027608a1b44e1fc76707432a9a14e1a. 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/ITHD42200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce210fed7e6f3f09c36634c7e4a8105aa41016d6e11ae978d66a4deb84e26d8. 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/ITHD42200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1190a7083e5f8f6e72d3e62db6043dff2fcfbd670a76db62ae95ad832323c7e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLRD52024527.