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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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64cdef7eb2888fc813af71fe8c07112db13132b5df639dcc33b33d143c66c0e6. 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/85e16fb3-71eb-4ab1-9c89-f2caf3ff0f65.json and https://artists.proofprofile.net/proofs/artist/85e16fb3-71eb-4ab1-9c89-f2caf3ff0f65.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 0xa351828d21ec14fdaca1a3ebb03410fde7ab8a15d1f6f3214736edc0c20f6652. 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/BXB6B2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb07d76c6d06fa6d9ae93f839f3c87be1ed0566fdece5f5a91396982d5fcc8ed. 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/BXB6B2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd93fc46fcdaff5c3493487ee3bb903b21fff6f8b61b4bf3f1e5d660b4aebfd2d. 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/BXFGZ1800022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f7d40e063ad1cfea32bce63ed3f4c5eecc2d472b2352dc641c46fd97de9e92. 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/BXFGZ1800024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba8244561b5d35a75a8ca3a153f78dc45b41dfe87f89daa2b7ec10b2ef9d028. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BXB6B2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd07bcd8fda8d6889f30ee64d5b0c13ad365cff8c0d838931b875a78fbfb33f. 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/BXFGZ1800023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e86a0a8c2d0143032dea028da09cfb1ad61d44e38a9faeb69afd5b18b0eaa0. 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/BXB6B2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b2a37bb36b6ab731671b3af6a2981fb0c303dd518d9085f8b3954b69e0073a2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BXB6B2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e10f8043d0a0033c25a55b420ae79310bcd9b4e0fa6a583408a50bce44013e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BXB6B2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa01d19f2e789550e51cdabb944557f69f1f0ad85ca60885595987ab497ab866d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BXB6B2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a7c60d444d646abfd3d7cde0e9e95379dac04bf0350c0ea1bde68a986f5502. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BXMUD2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc83893000ebce090245e0437f9dd5e360c34464381bb275c730b45960010bbf8. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BXB6B2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb07d76c6d06fa6d9ae93f839f3c87be1ed0566fdece5f5a91396982d5fcc8ed. 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/BXB6B2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b74c570cc9339ad4a1ff8e2eb9f64f40d683a89195ef1c9abefa6c5f478ab09. 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/BXB6B2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa351828d21ec14fdaca1a3ebb03410fde7ab8a15d1f6f3214736edc0c20f6652. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BXB6B2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e86a0a8c2d0143032dea028da09cfb1ad61d44e38a9faeb69afd5b18b0eaa0. 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/BXB6B2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e300f4425a7b449cbf6ac62450c6b03a1e5e1219cbbbe02f10816d8026f4464. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BXB6B2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a6795b6a9404c47a66d6a3ce92012d3b17199c6da95dcd91c67f68882999944. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/BXB6B2300009.
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 0x1ec5636fbf55400960f4dc6ee3697e8b9b5087e52669ff26f98adace5011520a. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/BRRGE2200646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe57806eb6be41e8750501b0e9173d1ff33be8e728defb180d16e8d8dab049255. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/BXK3G1900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba00a225d082299d58b27f49a057f0d13f3d42e2678cf2f6d48efba49962acb6. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/BXB6B2100010.