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 0xa493a7b42a57a350690941c4e0eb67c82a222a3e2598161e20f0aa52fcf9ad7c. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9e1ceeea-b838-4917-8241-50bf0c01ae9d.json and https://artists.proofprofile.net/proofs/artist/9e1ceeea-b838-4917-8241-50bf0c01ae9d.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 0xb71ad61bad33b4a1e355805bfe880bdd4a1a22e55c59f7aa208c7bc95e573cd3. 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/USCGH2593812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde46f8c974eaadead599fe2cba499076754e3b3e6721506580cdd62c582728bb. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/USDY42504162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3486ee63a03c2f9c447dbbdbf5baea6bdf084ce2249426775a499d2c33b17e1a. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/USDY42504163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89cb745caf5090c626fdc7f51a7f0b88bf9d413aec7abb058755ebe0867f1381. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:11:45Z), 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/USDY42504164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec7846738d7de09257dcf9fb6b583243d9a7d076915b09a762339e25ebfe916. 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/USDY42504165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe333652a799bf63633d58a181b96c99073b6dcc5c85fb4d1c7b9b0a8ebbab054. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:07:51Z), 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/USDY42504166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5946d482096c368852510e6e6f2830e6a374b49a8696171fdbc6e8a9626ae6. 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/USDY42504168.