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 0x44e498fc33a80ed888c2045463af645b6e95bd2d89bbf821b8cb1d4c857a94ef. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fc4ba26e-daac-4002-9599-40a89e14d512.json and https://artists.proofprofile.net/proofs/artist/fc4ba26e-daac-4002-9599-40a89e14d512.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 0x4983181521f24c762844c0068bdf6c81e7b839388fb55616b92cd4f184968ff7. 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/FIA3O2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b5b8c9f9912122aa1a8fd1166d2ae6efe12b7ccb129aff29e8f6a73162cc7c. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/FIA3O2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58fea9ae5b6a05241a6ae02c8c6ff366ca08e0a5dc00bfd2d73c3a53acc2e692. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:05:51Z), 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/FIA3O2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748bfce9c3fc285ccc52abc0d1c21540990c24ddebef3e801e4e2dc28e02dd3f. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/FIA3O2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602b2d632d58252a4f30a87c509dfaf915919d947a6bcd3433c6d4f76edfbf81. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FIA3O2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58fea9ae5b6a05241a6ae02c8c6ff366ca08e0a5dc00bfd2d73c3a53acc2e692. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:49:40Z), 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/FIA3O2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745fba3d6a6a0eec6dad9799bd1742f8e9b87bf966c072eadf78dba4193f3f87. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/FIA3O2400005.