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 0x5ffccda5f49b1b9d5692dbaad0723edab7f386568add61e7b23babe0c0edfb49. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0b005703-ad7a-49fb-850c-395dec3e6e0f.json and https://artists.proofprofile.net/proofs/artist/0b005703-ad7a-49fb-850c-395dec3e6e0f.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 0x2e9675d4797a3627ca6350295f0706fdc13e516adb2e3184933362cc68439dcf. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZES72289008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27889a25a49bb48c5a256c67fda7cb3cf24490f765e851b7394827f163d25958. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:30:38Z), 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/QZTBE2417887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620e0182aead0a6bd16ba263731ad84135e1543b5b4837f2826ccb5151b038cc. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:44:19Z), 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/QZK6F2503293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad91006550821853c2a802228d554ff16c649c4935948a586d20e9e8b0f75f5d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZK6F2503295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dbcb6b4249f4cded2b9a38f7e39b470bbb1e0dd004a96b781b493aa864bb4f6. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZK6F2503296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d2f53f683adff084788f554915ca2eeb43eb9fcca6b4b45998966bc79dd1b7. 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/QZK6F2503297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4757add11ee91485f357974bed4c212c5b3664689add96473caeb5c1061593. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/QZTBA2544982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281f88001be6e067ff0e78234b8db208d4dd4a3ebde11b23ae7b49ae063d22e8. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:39:17Z), 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/NLRD52505864.