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 0x5dab586774f32d4cdfbf1ee9cd4944489fee20478ad1e264038622ff10d0edf6. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cdcc1b00-462e-4e92-890f-9500cbaa4078.json and https://artists.proofprofile.net/proofs/artist/cdcc1b00-462e-4e92-890f-9500cbaa4078.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 0xe20e91944d5425ddb447a0ea7ff7e5f228b3810f1e0aa209a8a11af36a64773b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:09:18Z), 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/NOXCT2201070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecadc6e154e1ab83614e833befd983c44808334ccf1ebe7f049f47ae80172dc1. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/NOXCT2205010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ea8d8d11cdb1f660c362814cc51aab87d2b96864c5ef06d75ad77fa6f98fff. 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/NOXCT2309020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846f7cd3b654287f37918c9764b0a4e9e61f48ee61ce9f76b62dd0a8a289208a. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:59:57Z), 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/NOXCT2302050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd58f91422728ef811156dd6799a466f34c2db03ed34783e1c89a3ec9b24c248. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:54:31Z), 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/NOXCT2401020.