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 0xc08874c149cf47abe3d39881f254bb785429aa2bdd454b510e60868b9165f9c8. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/231ddfe9-515d-45eb-b1ea-244f14e580f3.json and https://artists.proofprofile.net/proofs/artist/231ddfe9-515d-45eb-b1ea-244f14e580f3.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 0xe43189092c8b7e4d0567e66695bf8b4fa403a50fba680f36be663a2c00ff22fe. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/ES50A2300411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51dd43656a64482058f5a5f19f1f9c93000104715294e8a53a3e881725e2e877. 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/ES50A2300487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f4bcbd457a58112517eef745be8cf29e263cfb5f2bfb11ae85f81d84a1b14a. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:41:45Z), 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/ES50A2500051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121e302f5b16d33c3a812a8650959bd42c4a8036de28cc7ce671ad69cb39732e. Chain 2 (Bitcoin): anchored in block 958369 (2026-07-17T08:00:58Z), 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/ES50A2500056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d3cc4fa24f3bdb8aa7e7cec8b4debf8784c39a425dbc33f069ee153b6583f4. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/ES50A2500354.