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 0x34d1c5b688b528e5c34276105711ac27b603eff9ba55c3138ff4ccb0df204bfc. 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/9d27c866-5c4b-4dd0-ad16-72ea489ff4a3.json and https://artists.proofprofile.net/proofs/artist/9d27c866-5c4b-4dd0-ad16-72ea489ff4a3.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 0x94f5ac3a5b58dec0b55acb45395707d7c7f10e9f39545c5ea420834de7b73f7d. 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/TCAEJ1928091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27241f4b3e3a9b1192f834006b63125096dc5fb02e65b1bcb5ce7608a58cd355. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:10:48Z), 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/TCAEZ2086352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9784d47baac042e00a6152d3bb2021dbeed35e9eb87f371a1430d38606fe7e61. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAFJ2147636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485ea524d3a6882f5d7cf9dac2fe58bb3d348e5b4d33598f271cb55796b33bf8. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/TCAFN2119315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ef4d446ac5377fabdfb024b8459c87bc326e5794105a057e1b2ea0438da464. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAGM2298810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02dafb379687709a070090be1466dc4d14698f2b200bac5c29f85e7c7e15a091. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/TCAHW2404974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x226ef3f169122ec9191c295ef4ca4f101c1e16f6b023e5d9b13da55725980bfb. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:06:10Z), 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/TCAIH2430517.