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 0xd0280b93170e06933cb2cf8dfe751720605b1cd537acb10564f51cf5ab7a80f5. 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/cab87115-b4a0-44ce-ae29-b0fc73055b96.json and https://artists.proofprofile.net/proofs/artist/cab87115-b4a0-44ce-ae29-b0fc73055b96.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 0x7bff8ade57bbf9ac61a5ab3b192a831cd03a6add22df264f85fac0d57dadb40a. 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/US83Z2497846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330ded251c884f7ee61f47c53775d920ac6bc0257a7f450785e58d740d77e960. 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/US83Z2497612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd18b835e1ecb1a16c3bddddd95e92141034aa158759ea7907cf5f814c246327. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US83Z2498319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90afe881f9989bcfe5adb76647c9b1b59d60ca05f69efaa44393b27fad5be5fe. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/US83Z2498410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf47dc2bb61ca153d93eed6ef23d42f6140a0caaa2b30be6191032e12286ba4. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/US83Z2497613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141b522b1256c9cc7cdf4fa45609e6349e7efb912715e96c1118b574cb6c2993. 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/US83Z2407824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dec3325aba6e9c8e84a648e8ac6f9c792c0124c165f9a9631e478e03fffb716. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/US83Z2413219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbec631d577a2e6e682a260012aaf996eb2f3d8e55e6dfc6f0aa1834f004902d. 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/US83Z2422991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc527a02e9f074db268e80ef82f79ceb91252fff0ae9a13e3b7e838b290392198. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/US83Z2418901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa87bcd98a78999e14650fb73a7b5245be1ab1bf61010dfa22d02cfdaa9c66b. 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/US83Z2428322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21793eee172249ea5255f007ec7586c8dee02c273049a237e146ff82c345b3f4. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US83Z2424659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400d56839d1ccd87a00041990d5a3c79b19c72c07e961503303045bc41d4d819. 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/US83Z2500591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x540356ec9ef296503ceaf1ffec71a6b48ebbf893f7dd5698df2b76d324f87c09. 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/US83Z2503716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb084b732ce0e9816a8ac6f4ebfe489445b769a3c465a02e91ba55f25e01f5263. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US83Z2506754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9316b6d593c067df7449f301ef34bd410e4d888f678cdbd51057a2b5657dc2a9. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/US83Z2512276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3291c175c992a539048ade9a49acca3450d7e4bddcf76a745576bc08d0166808. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/US83Z2511639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16db90275fa7f781f97141d4899f4be683b4f9803b8bf650e071877c4ff754b0. 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/US83Z2516531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb185700dac1acec9bde332ff5793bdbf0e7b0fab5280b1dd9fa10fe6bb970cad. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/US83Z2520604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15a49ec2e67ca2f455a84bccff19d500beec03764c19fa2bf43454ac14bb5b4. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/US83Z2521470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d40b5a80f4d77ec34dcd989767dd15f9b5261acb8cc6d6096e78cd023e0dae. Chain 2 (Bitcoin): anchored in block 958678 (2026-07-19T05:59:57Z), 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/US83Z2525350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95bf750fb7790ec5e81d7b7fc42b3f1b120d66deef683852dc817cff3f0db17b. 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/US83Z2526826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a6bd2aa0fb4ff7e7ad649ffc6df3242e3404c6b71d118f250cb043e830f1192. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/US83Z2529023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa676a4810bc625085633fe1f7af001d5bd0a9daf46d08b44d3468baf2553f19. 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/US83Z2538917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56bc66153ac5d3a02f2c94c432a6d34a18d08f6284578dabdd4a86823c79886. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/US83Z2540417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538b644e32a59b5348ee592e9b2475ec962f4ad016e87227e8cac6d049c30c9a. 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/US83Z2542384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6907d4724602fe9ec40a9c87d17d8872f9820eb99de3c59ef14c750ca34151. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/US83Z2545178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d34eff16545b6a63d25a610cbd19c4da8eadaabf1496f9e69b42cf59ceb1e06. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/US83Z2547564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417c5f40e1cb817f6dee2500bb8e636fb561c73d592b19285971419e7a1ea27b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/US83Z2553108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x475f87ec656c94421dfc6b1ded92c40610776966392986b336e7970afdda0542. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US83Z2553679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49892f67757de5f2f5aa4c7bbd380ef096c6f7aadb56b61ad9da9ba325a89b5. 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/US83Z2551421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc2551246543eb16d9d5e8aabbfc40acbe7d2265e68c0a281c0f5de2d1585a5. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/US83Z2561060.