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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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d43b052a5fa752ac7718a65b81c0c58195e2603de885d504bf2ec9283690bfa. 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/6337d8a5-4dde-4471-920c-a46b7ac76954.json and https://artists.proofprofile.net/proofs/artist/6337d8a5-4dde-4471-920c-a46b7ac76954.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a4874b213f40f016f6563ad82f4ed5d7697ceaf90c9e83ace7c23bda7c66c7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZMZ92056997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa528288fe2e848516eede3b2b7ae7804a502db5f519cbae472b3f4ce35c395df. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZMZ92056998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8edeaef826d4303491084edfae73bfa53bed30248e872b8fbca1ab6aac1c5f7b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZMZ92056999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b94f569018e3719d92aad79ca05ccd6161a1f9f05659226be25b206dd23d453. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BCVS22300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761a32648829e4d9a32216e3c5e74b3ed7fcebe08c896049ae02e6e46151463c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BCVS22300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c5220eef5ce05c826ca4f511dfc73b7e64b1a773a982ba4a51cee0cd7ef06d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BCVS22300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64dedf457785791d6cbf79d0e45a432f483633328d17257e3d7e8cbd342d1d74. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BCVS22300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde21455557a864cd53fe511fd3e6642280728f968dbf50e3b6f8c98f39e026ac. 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/BCVS22300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ee1781f15cf20e53df596fd0bea2cf0e5b05c106b8032c0ab3a633b278611a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BCVS22400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff3dadd97a8eb67eb9f4efed6bf78738ddd746f79cc4db32ab196ad4bed116a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BCVS22400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36850519aa205522444651c858629669091fd6dde840ea4ae44f9057d36df61b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BRC3Q2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d2431b1c413e4f88082b13805f8360ebc431f2b20c71e8acf7c9cda098f3c1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BCWA02100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83bc4200a8c802fb56a42749419f28029bae90fce60dc8522b3c3470ae1ae284. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BRC3Q2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584a2216a1ba40a29d375ba646cbb5b2bac5abb6c11fada943fd9dfc4550396b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BRC3Q2100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f78dfec68949ffeb73522546dc63ca0bda8634030cd370b954a099244f38406. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BRC3Q2100019.