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 0x5c742af2c7a60bdef17286f471978c4f2b4ba9f52c221db30e2c3012faabbcb1. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c4cc6a8a-d1fd-4e37-857a-f4437523f227.json and https://artists.proofprofile.net/proofs/artist/c4cc6a8a-d1fd-4e37-857a-f4437523f227.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 0x83f532889e1726cf0e46f7512d30ba486387ae3afa55414b1a754525a63db9fa. 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/AEA0D2306696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00b41679e0dab0e1b3150407a6f62ec763b3fd1e493a07ec4ef438058217feb. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFZ62474846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80dd58c41a212c863ebf1ab2641aa91e0500e6341f69417d029590add3b8276a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/RUA1H2442072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3bd48b7be0b11878396151cc94a6e3c16000086801ac65f0a99e3f24a1f956. 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/RUA1H2466339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b98a477785f02a841aa7b8f5204ea9207384e6ee97daa8a28339a3a43b3e340. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/RUA1H2466340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85e845383adbf8c3bf10bc6ad0837fd01f8182b409e01f3eb44223edc50254d. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:08:41Z), 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/RUA1H2466341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3d5fb06d48ca1fc1c94ba6c41f764834d73aa231b4dda0d5d7d660707df6e2. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/RUA1H2466342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367d6a2ce4bbab128da73737cb85610c1873e5521241eb6b165b96dc90782b23. 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/RUA1H2466343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34fe38b4abf985bebdd549cc8b03e902ec22fdf8aad3eebf25d8be732f71dbc. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/RUA1H2466344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba838250c6e762b3fe36736182b8b966d4f2ec02eb8e25d84390ee7185c4c6af. 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/RUA1H2466346.