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 0x4259b2eacb46309366ce0d8d6e4486aac63425a4d5f22fdbb20c8d8b97cad286. Chain 2 (Bitcoin): anchored in block 954647 (2026-06-21T04:36:58Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d746e9a6-17bf-4e70-81ee-d95e60e6f02e.json and https://artists.proofprofile.net/proofs/artist/d746e9a6-17bf-4e70-81ee-d95e60e6f02e.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 0x2fb358ac1c58861bf76632e5c00f7c0a6060d998c369475763c441c727ada178. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:40:26Z), 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/NLA9U0800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba99d17a5b5c689a2fe88489f5538375bc61a687fa2af32dd0298b36b1e0e001. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:05:09Z), 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/NLA9U0800020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7852685afaa6517c0b623d0b54128d68da73fece31ee065d864d242a2acf5fe. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:02:27Z), 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/NLA9U0800019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce3588c2140e52b2feb3a4c8c9ca5240d0fc85312c6487420d802b4d806b0260. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:38:47Z), 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/NLA9U0800022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac80c5ba3c651e5374fd632d374b2a01e2552fa23ddecba96a3425f91d2c1980. 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/NLA9U0800010.