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 0x2b63b22e7397d69509098ae4fd096a1336a58708f5da71813ed8d44466ff7eea. Chain 2 (Bitcoin): anchored in block 953627 (2026-06-14T11:43:04Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2ed4958f-46f7-412e-a3a3-8d0f83ce32ed.json and https://artists.proofprofile.net/proofs/artist/2ed4958f-46f7-412e-a3a3-8d0f83ce32ed.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 0x1db27e3d3caf8a48928e5fca8d8481761b86f1e593ceed21c7ada95e7ef9911d. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/AUXN22156094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00131fa70582aa2aba8f9fec83d084e1d111d6e4421000fe5d5f25d897c599e. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/AUXN22156095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a511d46148241c85f1e8cdea6f4bf352d61716cc2bb786c7ef2104a5559c59f. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/AUXN22156096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be58ebd73c8b4868c6fb1817ca451a54d60d8a7bddd60305e8616789fb4cd32. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/AUXN22156097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3698d9593f796fad0083b3bbc3b478b1d9cd5bc1eee6e1e2cf85d11ac1c0499f. 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/AUXN22156098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507b9c6aaabf948195d4425d7b63a41fa60a2ca2d6c0bd10ae63a0dfd8e525c9. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/AUXN22156099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84db41ea5304fb72548236bd144dc3c835c1514a6969e5caeef687be00c9424c. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/AUXN22156100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078bbcc319e5f95bbd7eb3914d22452f41d61ba3b44095638bd0e46ac08ca6d8. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/AUXN22156101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4288832538de74e87ec2f0ac740a33f6a9144527c5abd5f870997e47011fd9c3. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/AUXN22156102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc302bee16a832e5651ccd1c2fc508f9514b6721bac11db054fe12e76a827fd. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/AUXN22156103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b904d837dfbaf0a73611cab05860ec70ea6e0c9e02cbde922c691dec7f60df4. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/AUXN22156104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x354373915d5142c6def39e35eed143efad9d6bc4da0278b6cf16862c3f26b34d. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/AUXN22156105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf238273ff4709c14ec92696e68ab33854ce2780086863a3ec7f648c12914e971. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/AUXN22156106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e13f0a0c89ecd3f3a10b2c59e5261c27dab0a5f359845296c34b4196282874. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/AUXN22156107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28183cd020471143d3f91eebb193538d48e7668deb5b7d900fc138e791bbb97d. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/AUXN22156108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9fd88cbd8906f97c435375d85a60db7f99713f85a2ac976acbb564682d09d6f. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/AUXN22156109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ff1c2c2ec692b653a62fb2a678276f01ce0ca65aef66f539cf37ce277d0a8b. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/AUXN22156110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb214f42cc1229f48f872caef161d608b9e76da2c6ea4e056aee67e0e4e2144bd. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/AUXN22156111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88eb07b9d5af255e0332389e28d2b5220827e6dee4f620b193588a266255b7f3. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/AUXN22156112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x655ae0306af0cb57aabd211984ebabbc8a950e26d6e634969130d26ed6290f1f. 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/AUXN22156113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf564ea9b15d09df59d61621e095dc9d2122621595bf8d4309de9eb3ba92fbbb. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/AUXN22156033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5708411f8de9476c672e156d39dc83d3da61b7cd20eb97821b4a2f6149431737. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/AUXN22156034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f177cf3424c80cb1d6a973e779a6fc6ea847237584ccfa492ad342d01840db. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/AUXN22156035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c944c6edfc2e8d57da33593c8745624e90cd1b8c92fc489afd8b5fc00d3c70. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/AUXN22156036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0277470d41d3cb2516044c085d3a3315992d449362459311027cc8361cdbc696. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/AUXN22156037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65fb451894c63dfb0d70b9893ab6323f3533b9b4ef2081d222d137fca18d346d. 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/AUXN22156038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0210286131f9407132f401363cf2c7d071fef7eabf6be1d94cd77d9f51d92107. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/AUXN22156039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31f37435db562ce67bf35ec2665b834d3b674bef350e00dc45ee4a89cb02679. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/AUXN22156040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667347cf6cda35681728723bfef375ae12dce8de02b012ddf0a79b3f1bb908e8. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/AUXN22156041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8997236a59a45c25627d0a16be5a07c565a1c58b12c900451ebc8071bbf869c. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/AUXN22156042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70ff94ef9b54ba9ad2be4c55e99f737ed8e422d96965ab51916c2a78f57ce7f. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/AUXN22156043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96976a10336e3dbd064a4d869b8f454b2683e76c630e9f64c4c95b8a362e8d62. 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/AUXN22156044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6993a8d31c04b80d746502fec9a700127f3f862a82b31c3c2b20a451418c6851. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/AUXN22156045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678f8be7b685f3002eb04d4fa1776b6d906eb0051ef21421e3c4b517b756c69a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/AUXN22156046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2215a2f928b94b5d5ba9568656e0a85b072743a63c084e808cd2968830a7a8fc. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/AUXN22156047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fbcd55eeb4cec1724131e26b60660f45d650225104f38a29c93f120ebd6e2f6. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/AUXN22156048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6ff5f28ffbcfaec1af63028df31be489ad7ff2f83a75b54748897bb372f0dd. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/AUXN22156049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffffe09a0a800b4f596e4725c932b15db3846b72b50fd448351962b055b5e82e. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/AUXN22156050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae90a0e40450d20e009828ebaf97b5d3fea8f613ed44aff188fecc83d331332c. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/AUXN22156051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a6ad39afc9be93222c9584a72b3b4269c266247790e1f097e2bba56cebea2f. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/AUXN22156052.