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 0xc82ec3f926e53bbb66b95b1a401bfa6e80adf4fea0209c2864c71bb76aa9b386. Chain 2 (Bitcoin): anchored in block 954638 (2026-06-21T03:45:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d4862e78-0f38-45b5-a0a2-f7c44dffd903.json and https://artists.proofprofile.net/proofs/artist/d4862e78-0f38-45b5-a0a2-f7c44dffd903.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 0x8970d15c71fd6972183a8f51d3fc2ab73b045ab88f7b847abc90d8bcd07a4433. 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/QT3EY2463000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa0b3a6622775d38a24516788444163bdfd0631fbfcfe4097681a4d568e8e88. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:07:07Z), 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/QT3EY2468497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b7914ffcd9fa7bab4af30da5cc9d74677f10880d396a978fe55fb06955390a. 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/QZNWS2559225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d281593fd1b9641e7f49f48e301841fe0de79151b40c1e3097f5a8b7b12c452. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZNWS2557447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa01be920c404f9cbf48bc9ec62e2ae6dd25ab60b9da2836244a51cdcae20a64. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:40:28Z), 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/QZNWZ2501593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2bff3be4def6129f4fcacaa682f2352b43d3f1357424b77922f7a212ed1962. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZNWZ2537900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c939799d9638064b8bea5e1261ec4d7cbfb7ef0d92be1ad8f3ef9c13bdd4dc. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZNWZ2591242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24cee39b9edb4d84d7f0247dc2a3b6a19dc70da872ed7658bafdd05fcf8bdf25. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:46:34Z), 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/QZPLS2523758.