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 0x20e659da0b025b8ecfe9c5a548c38e22f1e19d021e98e2d95ee53cb36e1533ab. 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/65997090-6de8-433f-9c63-2aef5c8ba513.json and https://artists.proofprofile.net/proofs/artist/65997090-6de8-433f-9c63-2aef5c8ba513.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 0x7562d52cc55487596accf444807a3f6368ec2af92f8ec073062a3bdc706246a0. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/SE6QE2068664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa15a4334c21938524a0e7d7cf4a64a7d3c5e92c574f388b96e1a0aa54f6c2e2. 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/SE6A92146626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ae1366482f9564134da71f319610957d7cda643010d4dca5244ce829af04f7. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/SE6SA2159172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b4408baff40cd6bf3659327a3be48ca07ef06d6abb3b60774fc7cbd4fd56a9. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:39:43Z), 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/QZNWT2173612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40c0ecf159b1d26254bd314c2aa4b744642ff49dc3effaa885293a555062556. 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/QZNWT2173613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71fca4363edbaa5d93ef193f59f7871854db94b5f473e764b3b38cc69034e060. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:32:58Z), 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/QZNWT2152038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2667a67e0b351232f496327be845f0033414822cbe6390c177c223fd5da2fea. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/QZDA82252662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f5d8b5db5807d0c7da8803244a611326137febafce21521065887a4738fdc63. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:44:27Z), 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/QZHN62289594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c99a0ea4392ccfa659433498e4ab0337f355a0627e49e53b28000b9e2836aa. 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/QZDA82394529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f8cef6986d0d3455303363dc08919894fd9263ef28a6982d0e13cda96ed451. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZDA82395858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428e19e226f0f2d1f624966b27e0949d862e52891257bfc56834ae1ea6afc9e1. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:38:46Z), 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/QZNWR2377145.