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 0x539cb571e8bf486347b04adb3896148a696c5ee535f036dde5fe3cd1cb5158ef. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0a18872e-89d6-46c2-baff-b07804770f69.json and https://artists.proofprofile.net/proofs/artist/0a18872e-89d6-46c2-baff-b07804770f69.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 0x714fcf42493d9d2273551323ab3340c0ef68d06f3594a9f298d664887baf65ac. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CZD740600101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7e97b957d49dac1415e3ebf3f2009eab3ca65a6ce62e7b92a2cb247ec90150. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CZD740600103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc4c8155f06e3460b4e781c549869650d08ca82c66c519c158681a99e104cad. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/CZD740600105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965d8dc2b42a7851ff0487da93c75ecd888e95ce03b4f49a6ff4b0da03c0d061. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:28:31Z), 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/CZD740600107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d9c8e77363d58ed659bc41219af73f418e0c7458de85c04774651a17c74ed88. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:47:23Z), 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/CZD740600109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e7a4d06693eedbef1d1b58468b703a0c4d3bccc61b9510e26081987de19b88. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CZD740600110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6ad0aa1420ecf334c617d38ba963b8716cd1a2a5a8176f78edd984c2f91cba. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CZD740800201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c96df5f039c1b5bc1595cf6abe0dcd666dfb974f4f23e95971520913e00988. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/CZD740800204.