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 0x371b2e983fa038397b34e64e2cd4fbe922253e38386013b75bf628a94e65a964. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/045a17a0-ad2b-43f7-acff-943a144a918f.json and https://artists.proofprofile.net/proofs/artist/045a17a0-ad2b-43f7-acff-943a144a918f.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 0xb4be96b6777452a1e6326c127aeb1c5137551aad5c9b86b84a6bd857b37d52a2. 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/US3DF1800625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbffd381074ce4c9aebc3f3ac74c0db563b694fbe088c171b4c90005bad1c6984. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/US3DF1800676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a28418222e01ec9fa32e17363fc6a89b587cf22d22a25d8b920c601fce112a. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/US3DF1800818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcced8c484ebf41acb70eaa994cbc7004c13874d502dc1e78009233a00c41dc0. 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/US3DF1800556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a9ad31d82d007d725793e71d68e1ab114b6ef1ce87698e601e331c125d35ef. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:56:42Z), 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/US3DF1800560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2907b1121faa277f0514de7667f8bd5ab206a88b225f21472ec54121cde780f5. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/US3DF1800704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf294b58afa28d55ff301b52345b1a362315e00500373f251e7946861e37727b. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:20:31Z), 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/US3DF1800623.