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 0x4b8d328be65c1bbba7a22027e0f791e9d3246c4f56cffd828989d5533e48c2ea. 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/7ea3f8da-1b51-4b6f-87d6-55365dd80432.json and https://artists.proofprofile.net/proofs/artist/7ea3f8da-1b51-4b6f-87d6-55365dd80432.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 0x632e126cc7f68c01cb73c4ccecc9603348591961119a107e0768b9692014916b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FR6V82290388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127bdcbfb80bbc0748943713d43420caab445686d37227483d7cfe80757f2c80. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:10:35Z), 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/ROCRP1403603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127bdcbfb80bbc0748943713d43420caab445686d37227483d7cfe80757f2c80. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/ROCRP1403603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb54590a56846c1bcf11a49d0b691f0b6d81ad76cf42f8f438cdbc4f0174b5c1. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/ROMNG1500070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5668d907069ffa8022f1b4762a11e24deccdd8c5be3e1c049cbe4fa3fae4b1bc. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:04:41Z), 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/ROMNG1700119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35fbed1eb8aeb0614265e5c4bce6033ca0a94e2ba08f9abb2b0ee93ce44fb5e. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZTLA2589660.