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 0x1780eddf5d8c60c0684222796792190d420725c536e00879d5f66844d1d95d84. Chain 2 (Bitcoin): anchored in block 953710 (2026-06-14T23:32:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7f22cfe4-099e-4c66-a77c-88b68ca84500.json and https://artists.proofprofile.net/proofs/artist/7f22cfe4-099e-4c66-a77c-88b68ca84500.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 0x5cca992d7a35b2fe7a4a8f8f1dd8fc98c64046ff3b62536cfb9249e2e202b722. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/LTK772200003.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48e5e80c41307ab0ad26514d809b5304fccd87c21b0fb71988cffb9d6ed8262. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/LTD662400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a4ee4837590c1c6a3096b6a5613d1eb3cea2f5d7880aa3e0f1ae16ee7d8e8d. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/LTD662400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadff04734f3b13728ffe6429d4ed4ac1d338479902150eb114466ba0612d741e. 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/LTD662400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ebcd1d49ec0e337387767eb193a4786a41c239e4b7f26208df30f0185a28a34. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/LTD662400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0fb6812ac2d42e67ae2fb0e99772dda5a685debe61d70d9791f73bc06ce92e. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/LTD662400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc637baa4f008b8b6a22dd466a33ebb59b5feb7ae7ac4fa7ef2131bbed4294c92. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/LTD662400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629792a65983fc7ffb812a687c3c0011c58998499034e23727083346726a0237. 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/LTD662400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a9fa3189ba9236a1068fe060b57130328739516f444fb7d93710d36cc00b04. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/LTD662200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132586a05333e662bd5a0276ee3175c9428792925d1d7dd7216ca2154c9df776. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/LTD662200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31029298949ce74918519352f844c490386eb6c6d6a9982bfdc03c86278375e7. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/LTD662200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4f982ed7abe6796ca7f1e64ab0835158254f51c310804a3396353d4172a514. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBKQU2032754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772b15984b54abb3761e90945e18892db97bb5c1e4f85d9fa18cd716926fc9d0. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/GBKQU2032755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e7c7e91223a774c17b68c25ed369461a63818f6221f3ab31129cb1d6a4cce10. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBKQU2032758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x297c8d66979bbb05fcb9fefdc7bdaafb3bb3ff7037851aa11d88bcee0d6c70fc. 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/LTD661900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66448e35de72c4ae8aadd804b29e18d6e2414d810935e3d7ad6077379891d54f. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/LTD661900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0c6f05b5b4141c01c7eb85d28310fe71dca37ec52986675fa0902759f0c378. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/LTD661900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1130fc20591742434b1fc2dd7bac87ea82e031d52d117df26f115a77183dfbf. 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/LTD662000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45617e4d61a65664c008ed7b0f17269d46d1cb4aeb998e162b7327c0219d01c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/LTD662000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1c218c2c0b8fa3979641050b8e3bfc57bec4555b3ddcb245bc3eacb526b329. 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/LTD662000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93fa4ee92037362d0d2e6e99cf0972ed2837eb745453b824d5d07774d9cb3310. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/LTD661800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ebcd1d49ec0e337387767eb193a4786a41c239e4b7f26208df30f0185a28a34. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/LTD662400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e18617a8727cb679f84699b5792d85ff728da707702d76ba01c3723afea722f. 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/LTD662300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d11fd4af31f3c5d52ccd0307e05eba7aa15a3ae1fee3593de26f654dbfaa1d. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/LTD662300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c39155ede1082d5ba18b7e07155f0922606e1390153f661715bb42322f35d5. 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/LTD662300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903352baca0b430a76863b8a9df1036c78cfc86a0ded3551a023d04040fdd318. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/LTD662100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4190576eeda204e4c0e3c428f5f0520bff1f3ef280b91b7102b14dc45e2f0d. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/LTD662100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb985b170041205381eaf044652da5f49cffcaf9a00e4819ad1622ae476a7be. 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/LTD662100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb102c9ddc308fe4499610ab1714b9b996bc1068758984824e49a2f10fbdb730. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/LTD662100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947aeb19b78bf8e2e49feb63f9779e5ee182af2d087e891ca3f606416c07f239. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/LTD662100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2fc067af27c7e10d59f77543cbd479c3be53dc5ed0f14fa762ce7db5504b37. 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/LTD662000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cca992d7a35b2fe7a4a8f8f1dd8fc98c64046ff3b62536cfb9249e2e202b722. 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/LTK772200003.