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 0x572bae548850afebe11c315fbe7122ff3d23b8a72ab186234f816593b79e6071. 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/709ef8cf-fcf7-4944-9b56-d4c8ea8f3bb3.json and https://artists.proofprofile.net/proofs/artist/709ef8cf-fcf7-4944-9b56-d4c8ea8f3bb3.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 0x1fc68b0463c9e6515d9181b9f27c37bc6cd3aa3b405c8cfb0590c2ef9802da06. 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/NLM5S2301887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f91e5c83a5286588661cad678522016e1a38e88aec39e6659115847fb2cd57. 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/NLCK41073759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62d758082e2cf0e019ea3b8fdf9ffa7d6f610cb5a65c900ab5165274587a82d. 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/DGA0M2318608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafcd4cb20740c6653e6a0be763f4574f6f27d64a559fedd7e557a9d9b9433680. 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/NLCK42225888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a227a6fee80a9a94cc2798cc289df92ba7a8845f4cf2c0851532ae72c605f94. 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/TLVEM2400255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00fbd8a5422f458ab9d95643f926ca6503d7ce4a2dca68c039a552a1765c50de. 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/NLRD52355091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9aa75c91afdada8c9f26123e47134742fecdb2731aeec49878ce5c8d939a71. 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/NLCK42235670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d6f05ac7285cf9ad3eabb8a7fb72333f95de53ff322103806e0add03a46701b. 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/CAUM82300222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68036f50a152f4839d6f9618d22d881ff5b754b1972d87c15f0258a0fa3c4f30. 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/NLCK42218877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbfebc8cb04403882d99989c5d18d8fbbc3be0bac94e46925dfbfd767228f6da. 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/GB2LD2210294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049af98b1abb7bb0364e97fdeb541cd3eae0cc90c5024204e83f8115944de59a. 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/NLCK41097047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcae7cfc23edd867eea9336b368d48b9b53b4d0d136550170b373c639474b04f. 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/NLCK41097048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f75a8e46578d9bda8926a66aa0804b6f4b5a682ef3221d11f02e10fb05ca39. 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/NLCK41097049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac502de261203a49f65a9ec33e74cd804b008b90216a75fa7cdb17f3630d7ab3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLCK41095578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba097c77860330ac6d562a9652a9ac2a96329bd58013e796e7964e9a146e8023. 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/NLCK41084460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b40434f9cbd46a69d37571803f5c4b17396796634fe3fd6062f2cabb48cd6f. 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/QZ5FN2151040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8aa7249930a4304ac3a8063bbb152854358cd23fe55cdf4b62fd47a3d474226. 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/TCAFC2042532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25124b86f96d8e1aefa5d3bc1f8da9fea8e178d5befb2e4e673992312986e268. 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/GB2LD2010174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ae2dbfa0eb7a322a56cb9443c492ac92567ede2e43cb9f4afa4ddd69bb1abd. 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/NLCK41066896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62d758082e2cf0e019ea3b8fdf9ffa7d6f610cb5a65c900ab5165274587a82d. 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/DGA0M2318608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d22ccaee217fddb36e1d6497c5167621ba3d24e353e8bfd598d9e357df1f711. 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/QZFYY2012394.