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 0x44beb248bbc66f17cdfd71213d2ad0c4273024495247b6564c6c9e05d5f3a18f. 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/73cd50ad-2925-44d5-8978-0e247af32a9d.json and https://artists.proofprofile.net/proofs/artist/73cd50ad-2925-44d5-8978-0e247af32a9d.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 0x96b12e7c3a2ff272784165c0f0c288628ffa4c5c20b91a996be71a7314c8e953. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZK6K2002570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4779cad0afce5e1757c772bdb50fb4d6c5d6858c7ec0029ce427acc53c7f306d. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/USANG2110281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1c1736be11962de99dd894b54203ea0ce7dae858d9dbdf1af8b3a2d4e3d4e3. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/USANG2110283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8a837f6b3f1f600cc7a0f8320bb908eb3bb2d3b24b009330373685f9a523b4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USANG2199908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152528517bc9f9d331ce0be97cc94656ee633f129e4220c7e37483227f28e6cd. 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/US3DF2101169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb988de62cac0519cb682520a5018c23ea3194828f4502537e23cc6f18fd0d2cb. 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/US3DF2101601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc18da61a5dab6be8805484743608a6a6de3fba80035a4fbcd7c4829f32c49e59. 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/US3DF2101602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03dc0f9d4189ec6a373eb88fe012b0934d991c5ed326db8cfd5c021d5ea56593. 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/US3DF2101605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152528517bc9f9d331ce0be97cc94656ee633f129e4220c7e37483227f28e6cd. 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/US3DF2101169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd035710d673ecd1399cd230ad4b0e4ea7550246795f70d035de78eb63e304945. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T13:39:11Z), 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/US3DF2211287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e793aa014e28612df1a96ef44259dbb6ae5f7b7db1b749323c0ad7fb2d1e392. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/US3DF2241681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327915a3179856ed505aaa58b352112b541f0370bd7313a9711e1c80b8701d10. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/US3DF2241682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b9e8f89aef2082b048f3dd5a415cff02ea3681198a1beb918fd8462e78e0d8. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/US3DF2243669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf716ecb190249564fd59b3891253b588afa481d6fe54a25a1c69c715f49d9a6. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/US3DF2248441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37861e348f180d91991d0fbdbec4c86eb78a9637ab0083c74d9f0574045b0135. 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/US3DF2270680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f64d3ba0e92a68b3c48e6a63e9a0d4c064a72be6bce9b5ece027de8c0b1452. 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/US3DF2270681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e33bdf6787890264bec8a24f011e3626a05ccb8a7c375c711dff74018a9f81. 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/US3DF2270682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f60caa4c75d2ffd30422821f7bfca4c52a057b5cfcb9980af122e3a3729033f. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/US3DF2270683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37861e348f180d91991d0fbdbec4c86eb78a9637ab0083c74d9f0574045b0135. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US3DF2270680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f64d3ba0e92a68b3c48e6a63e9a0d4c064a72be6bce9b5ece027de8c0b1452. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US3DF2270681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c2b8e207aad3f4c38c985a6fc077789b33896236dfb3f97a75df46ad422442. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMANG2201895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f26b409877a9f6a1611d3c934792977ebb75e8de738c6dd5e7a0c120a31ef1. 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/US3DF2454234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ed8e82cb806382a09225de9a26a4f9e5db10277b132b27e20c153602c52adf. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USANG2450985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf641c0544ba3f662b8fce7f7d54caa1a483735f982a0207f85a9c3ca69f9b9d2. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QM3DF2442887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51d36389a7587ff1655cb7a68c677ba3284f684e565457f79e9b3432d104ca9. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/US3DF2447159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03167c4de8901518c2ab6cf63e933bcb3ce8644ec93b3eca3403ed01cedfed29. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/US3DF2450834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616f2083a7c9cc062252f972ea549b03c7c6e3174e87cbd60afcc54370dce4bd. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/US3DF2460364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a47af16d116030017ea1254680e8e4a77b16365e5fef8f9bdfa219b93e85a0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM3DF2422767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2cb22f9c879205c62f387fc1323d3058d58ef487566f58a2f9b620b33bfb65e. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/US3DF2501520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb83137d19c3413ba6fd93f6d059770b089e52562052d310540d7e1afcc590693. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USANG2485016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4506e26fea366acef4ed583e3bdd8b46e80bb3c12b187d946989ae66e8230e73. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/US3DF2520600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce543136c7e3764d69df65c722d29c94b7da4440c74de00e9e8ff3d2c9ffd95. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/US3DF2545874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49dd455398b6fe0d2ddd4c62ed20766d5da63be08f81cbea463e76b7237f4aeb. 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/US3DF2545875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276ea8d5f9140cabee9d04ef470309669b6b5c94bd0a91c7130ba8b7d3a538ef. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/US3DF2545877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90e7e8e336cfa7d11836f2f3c08d8c55a581f6bb9e484520c109762f25b5cdc. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/US3DF2583522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e4a32a32822a21b8e157b4c498d6a7708c7a379246be68d10029cb278a482f. 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/QZHN71945694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e72218fbc55a18fb2b275d35b6e13b45c7922466552e645fbbebf6a1a269b37. 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/QZK6J2120028.