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 0x3663d3308f7062a2b71ef7bae8bcb23addc1225d3b82062d1582777dfa477be0. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a5a291da-d835-49aa-9438-0b12832a2410.json and https://artists.proofprofile.net/proofs/artist/a5a291da-d835-49aa-9438-0b12832a2410.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 0xf613527bad9d1c2b59f9d3f103c120468a443dee7aab6d2da67b354a6ff209f3. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCADY1805463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64627c3ba4a3e51c826de2f204bb49f236f7b1fab09567b5e3b6a30829e2eaaa. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:37:35Z), 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/TCADY1805478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b6999d8e1637d4dc4681746cd1a7fefc3f13693b53c2bed2536f7401fc8831. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:51:11Z), 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/TCADY1805496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c89b8960593bdf7d56144f3ec65682122f314f1e4f54c7da2b573c8d8c0a6ff. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCADY1805497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d1e6454a75f095c3ebf17acd377ec0344d85478245404d824c7f87dbf45e78. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:23:49Z), 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/TCADY1805498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3c9b0062fa949754061bc53c44d68a58fada5f8a346172d5e5fbf5e097970c. 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/TCADY1805500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4822a7e54238a10bf6ac94735befe1043309eb4332017299968fc5eae2c78a. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/TCADY1805501.