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 0x3f58727a46887637c7d3fb1d0025985d9d74ac541aac8f5be5d4a4ff4dbe99a9. 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/d56f1635-ec7b-4b0f-a118-896a7ef094a0.json and https://artists.proofprofile.net/proofs/artist/d56f1635-ec7b-4b0f-a118-896a7ef094a0.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 0x2561a1bc1daa2f66bd1099b3dba39d3264d045d94dfbc99b307cc4378b6f6baf. 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/QZES92385306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf91bab5b75baa8ac6b62236bf6ad94fc977b637e7ae6191923120c666d00c0fc. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZDA42377281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19828c8fe02dc0b93e1e52b8a888f7bf2e9eb46f55b6b7e19e00be698a549046. 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/QZHN42322502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1f9efb27ec81ffc357295ebda434a146114e615ecaa95f8cf195a5bb1798c7. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:16:26Z), 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/QZFYY2299541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938512228fde9c505bdd38b96752f2bbf05c57466596745f224c057328aec0dc. 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/QZTAS2238764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70dd8aa403f67cb5c50f21f74b603b0d7c6bd99604cccb0b692611ba59912aa. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZTAZ2311630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3a4aa4c23898e42be0a17e80e90153cbffad16a79702a4975b8885dfc2b3c6. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZFYY2299536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecadb6941ff22c7eba8266eda8cbe09635a66b2bc575cd3b63c1895dd2b98d6a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZJG52363800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249df37f30c97c868c8fc8bca08b6f069263b06cfc170675db790c1937e87a0c. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:54:23Z), 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/QM42K1760574.