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 0x9b477f7f1eb40523d796e8cd27de6aedb39c5972d385e761568e63d640eb5a45. Chain 2 (Bitcoin): anchored in block 953667 (2026-06-14T17:49:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/577ffb10-a23a-49cb-969a-99b1758d9eda.json and https://artists.proofprofile.net/proofs/artist/577ffb10-a23a-49cb-969a-99b1758d9eda.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 0xa897bf4cb22567565690b728c5fdbc44fb154ff47a187679f575d4ff5f55f254. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DE1O62476881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea8bbab29f9aa338e3531813d947140d8217eab8dd575cf0e927783b2003478. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/DE1O62477153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9252da949edd192f2aca07effe45150c02f050cdb1da59467ff7cb6bb2f878. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:13:08Z), 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/DE1O62476865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d06da930c1a33eab1269777061ff2d540c5fa665ec2db910dfe54d01ab36ce. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:35:45Z), 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/DE1O62476773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1c379f8caf539e9a630c2296f1c923a0f48dde50be749afa772f8e61a5c12c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DE1O62476818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe2328a9dc82dd56e9d8288409ca480d2b9b0796d10fcaec3b7c0ec7d6dae62. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/DE1O62476891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d510cd7b2e3577fff2dcd031598f7882b97ed67d19c8cfa5c63fdf9a47cd656. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DE1O62477084.