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 0xf752337a4e3ac11f96d6536898a1c7394dc380250bc7e60397b0f0d43f0a6997. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/414d2697-d843-48e1-9001-c6381ec079e5.json and https://artists.proofprofile.net/proofs/artist/414d2697-d843-48e1-9001-c6381ec079e5.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 0x96a68e5c8e5c8fc89c28fb1ba53ac70b5480a4432a45e9a56723117c9d62ed02. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ATT251217220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d5d2889bb401544305280cf5bdf8cf1c0ddf09cd7807fcd45e41e523ff1d63. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:06:25Z), 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/ATT251217260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d83ecead5431fbf0429d7bf1877e382a6dfa349a8864d83f9e4925c1519a22. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ATT251217270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a11e530ff8654c3b31138949a5d7de27ed78cdf75db8478994862a17a4530c. 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/ATT251217300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb99e598cd7ae217b32d2162634df48976a36a1bbdf57fe6fef898bbfb681cc8. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:23:18Z), 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/ATF470800325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd9f6210687438ef3fba7ab41b9c43d73e5b9ea8f1a42625c041ff0fddc227a. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:05:12Z), 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/ATF470800326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6f5d0620578bedf96195fcd97cd7b44663ec26f6e817f87c66e0cc153bf903. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ATF470800334.