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 0x08626f3ccbeff30d5876101b5a9ca3a20fa7e8efb07074b5cbae0a5643407686. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7eeba213-ea11-48f5-92e0-8fd1ae34d129.json and https://artists.proofprofile.net/proofs/artist/7eeba213-ea11-48f5-92e0-8fd1ae34d129.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 0x34fbf2e3e0cb4f43fc18cfabe202c675ebb63e73a4f24e504ee47652b12b8713. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZHN82515997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0885d5deb6ac2834a183cc25f00d1fbf9613cc2ebe78ccee57ea87673ff0832. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:34:24Z), 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/QZHN82515999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3d8c6445d990e3f25b5a5efc089d263f87587d6cc3d942ed2e3d0beee3443f. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:07:45Z), 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/QZHN82516000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4b9e043ce7100b85de77cef59810ee049ffdfd2678ebee58cf6f27f69744c4. 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/QZHN82516004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d1f46ca9e872eb12ab244e1ac4ed62a6d0556ccdd5dbb8e13519556b06ca20. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/QZHN82516005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15461d7d6afe5a55ad63ced1a55ca324573d18983d3c1930145333c3cd4acbae. 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/QZHNC2532625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012a91aebe2f6c3be107df63d438726832d880a445976f2f5ab1ebf34c092f07. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZNWW2514907.