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 0x8baba9b76727eb45e08cf615fc1f6dea42ea5ab57dc5ed5d4a970ba884ba88d2. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6f988d44-1397-4320-a0a0-00be5dfe502e.json and https://artists.proofprofile.net/proofs/artist/6f988d44-1397-4320-a0a0-00be5dfe502e.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 0x6308e9377fc11d48c183b3f6597abd980c480fefe00d1e2843b9d047003fc71d. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZNMY2292799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8606309d67472287dec08881922adbd3d8365841b214f6818aa48db25ce22f. 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/QZJG52367673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9edb6ec6892c465693ec8dbb9c3e807518693338c9ff4d3503c7c837d757f23. 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/QZMEV2338191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2346aa5375471e4612fc8bcb0da47256967dd2aa1cb3384479b4786bda43dd. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNB82367362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c37c5627441fc527d8e5e56181d51d9b777310af64d7aa1b1c483915f710a57. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:45:25Z), 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/QZNMW2466186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb861e02f87918f2ef34101a9f3df76a742ffedafe3d80187997c2cbd157ba197. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:04:54Z), 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/QZNMX2475962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc3b40ad72c239281ed753602efabbbcd68f2cd36c515a2432e9b09da287066a. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:50:44Z), 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/QZLL92567419.