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 0xefdaa793075057f09a24d999b9995b83df068b1d8af110fbb2c312e16b110e37. 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/9b2bd08f-2260-42b0-aea5-83ea5c80652e.json and https://artists.proofprofile.net/proofs/artist/9b2bd08f-2260-42b0-aea5-83ea5c80652e.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 0x7d0e729a6d90f060ee114d41d26fbed08349f7d650f4f0f5e3b2628c8ac34655. 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/RUA591302973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539be873078213c93f3fcc0c55ab28a1f6c1d1806b6ef3224eaa401d5965bb42. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/FRX201822107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca31d7885e0bb700c2c3f249e8d36c74449ae413fbba2d0830769947bce988b. 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/FR10S1949752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fcdfc2ed0a016c7f3ce122f611f83b6ee803aa4fb5ffb675e5e2cc9e20d7733. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/USCGH2092086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d80d7cdf19ffda6a4835e908af286397d7e4b98e4c6ff5e192ef5032483ea1. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/RUA1D2004814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851a6c97ccece92effb8cec346a61e580297ab473ae76fb7b78d494775c9a917. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/RUA1D2004259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5544e9beac7903a176063f4697439a2c1633fd4e25cfb83d79d95398534b676b. 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/USCGH2081151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d4190bb25026bac76e871b99dce8677ca1a0e6a58d36ae32bd10d457751dde. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/USCGH2081153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f4f5cea4b9ab47ede81134fb67eaea7e3a87d5903ad6633db3b36b82d6246ff. 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/RUA1D2011553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c95355f072b15eb2179a1bf1d3525f4cdfbcee4c3a75470bb35e50478f31ab. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/RUA1D2028942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4aedf6b5917cde71b4b5f1b08dcec9c2a7c7afb3e529d5ca70de08e073c557. 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/USHM92034505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba5679e6db1dbc0fce34d0fe86c2a002c5bdc74d2271da019409bf435904d5e. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/FR26V2025534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00603c9c27c485cc8c8d0403307045a4001c25d62432165a905bda242de53036. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/RUA1D2069861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721b894d014fbbf1381094c93c91d88d017efb1b18b89f4638e096a14e52dc5e. 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/USCGH2194422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89fe4bbf73ef7f8eb7b48cc2748c9a6099e1074b7a27c6f94cf6c18bf11e7e8e. 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/RUA1D2103346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e6b345ae74a03b708bdb660a8bed22513407dab6f2addf64a0770dbdc0f10f. 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/RUA1D2126529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585f5c7a65021d3453fdea82e4f2bcbb25bbe0a8c5b503933fbc4010cdc4a96b. 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/USL4Q2122338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c78b739de3df97e34b5b02030f07c88a68df001beb853c81f031ac6d58bb0a6. 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/RUA1D2169836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe876b4af347a501ed5d4cf859c42f49d5ea9c0be4c794d5fdefa587354a18e91. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/RUA1D2170953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96942efc75a8b1265a5934b0b4d5b497a02f8cf1635386dc396b279f71e7b687. 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/RUA1D2200833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51da6d0030e4018c4bfbfa5e428ab855a893db45df21e52307953c99668e2861. 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/USCGJ2272067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6e01d7fc436f928a39708c19806c29a366055ce01189770fed4ff3106f50e6. Chain 2 (Bitcoin): anchored in block 957579 (2026-07-11T14:35:38Z), 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/RUA1D2288075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5747e40778ee331e5a42dda3e500ca083432ca056fbbe2f237c2870d4be74d06. 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/RUA1D2176071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a6b33a72d00693cbfb9c6a3790a53b86eeb1d92140a2d4545a25af8892176c4. 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/RUAGT2208354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3301635460226f69b1c225650d70191a871331b89a0a7a083c84959ac6ed6f1. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/USL4R2213719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1153ce8cd9aea51da7791563a7a23c4749b803167050eb61d2e4ba97e7cf014. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/RUA1D2323698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f50e5b2422afdfc3170f527d2e0b0c082a5438c0a94d60dda3a1e4a571e8ad. 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/USMH92342886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3889f4b3c29713a1a17fc073bcb7e6ea87e37b3a574f1a75dda1bc11a44b0a47. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/RUA1D2391914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf19ad47347464cf8c0eddcb4610a69f05f96d27f4ee52fdc3c435c0cd39c45d. 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/RUAGT2324495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32598ff70adbe38735cdc60ecb3896fa1c2dab6301c551bc8de64b11f4bb9bec. 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/RUA1D2458608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f884c71c6e33fdf75a5cd632c96b03a36b0a46b42be0ad722586c40682df391. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/RUA1D2472777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39025205950d09b438fc294c0b029f931402b44f7bb1bb7ca68938d84348d94. 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/DGA072494378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f5c6cdd23cfd8e015bd1cb548d4c6d27c66ce17aaf5123c8e9b4a74017208b. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/RUAGT2450622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff88c2621de5ccf7cc8a366b3466777ab5904a2fa042222983e052e08d353af. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/RUAH62420616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7715c616722c5f0bef001f3431058b89d4b0680dda9f94b909b7e18848e8d0d7. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/RUA1D2576957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x591a0f792919bcb12061d8117bbdc3476670fa1ded7653c957a0ba18dc780b64. 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/RUAGT2515618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd3b9dd1b1ac00c8255365f094708cfac32cc07a8c491af832d9c4adf0aa3e6. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/RUA1D2352797.