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 0xf5a0c7d1daa111c82df812433878e287599f7cfd5738bbe1c745b2d9194d4f99. Chain 2 (Bitcoin): anchored in block 953614 (2026-06-14T08:40:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/15ba1df7-e5a7-4b03-8c02-284a8719a708.json and https://artists.proofprofile.net/proofs/artist/15ba1df7-e5a7-4b03-8c02-284a8719a708.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 0x267512b98877c03ad7311487df8aaa0930b42968841cd455cdece380ddaf86c1. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:17:40Z), 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/GX8LE2208085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b80c24ff159526c6dd0e5c948ab6830b9ed00be44e7191862c19b4efb0db4a. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/GX89G2373339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c44d56995a63b9ac7fccb0fea67cb287ee48867c67b1870bf091d5734331078. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:52:45Z), 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/GX89G2307650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x825bcff69545181c52451301de18968ab951b7a1724ffb89c9c0eee83b5ef6c7. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GX89G2313592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f89c1c8ab384274c2a8d9e08402df6a7ed7b0c1110ea7dfff9ab19226bf3451. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/GX89G2396839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f084ebb9eba9ab525202205c0bb116bef763026dafaa5f63da079b70a07fff8. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/GX89G2368949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc090ca89bf8aa5782528e7a784de366a218b20461c5984352399ce7c4066fa45. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/GX89G2336668.