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 0x6b6ae692f707075da527cf658d7880333f41aca4f8e6b7ac6860759da780a51a. 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/dc4c3959-900f-4556-82dd-87b3b9d9ab87.json and https://artists.proofprofile.net/proofs/artist/dc4c3959-900f-4556-82dd-87b3b9d9ab87.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 0x2c8a545343eceefe68f8caaa5b013b64b6427e0719689ff554d3a91118fc81c0. 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/DESD82100409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a28709a11ca69824d5d109be3590e9b99e7d9f6af9590ea6414ceddad2f620. 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/QMBZ92344463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0d39737b017c59b0e62d8cb352028d3b187b723aeb4a499369323ebdba589e. 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/QMDA62312497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248294e5e73ecfb660e2d58cb5c38fac9eef9e17919521555e04c7ecc453103d. 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/QMDA72378449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241ce294408c6cbcfc75560c34636cded37d00af0d1ead114db1de9fa378b7cd. 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/QMFME2364818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c65af3c64868ab8ac3e02e942b71d723ed1e0f2145453100efc86de927ccc90. 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/QMFME2372469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241ce294408c6cbcfc75560c34636cded37d00af0d1ead114db1de9fa378b7cd. 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/QMFME2364818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248294e5e73ecfb660e2d58cb5c38fac9eef9e17919521555e04c7ecc453103d. 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/QMDA72378449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0d39737b017c59b0e62d8cb352028d3b187b723aeb4a499369323ebdba589e. 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/QMDA62312497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7321c68c44a3e00f8300ee165583918525d8e90457c2403182b27d2f45b47171. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/DE1AO2310160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f5b57247bcde45bfbbb3599b6d9905c19f24f65f3680f9d8aeb2a3c5b3fad4. 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/DE1AO2210154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd4c24ea49ecc7d8f7a483a21c9a2002795dcd1151f816a8ffe3e3f8fcde0835. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/DE1AO2210149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3779537a135d6c3131e85c8de8ef5edfec7a48733b6323875308686f359dfc. 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/DE1AO2210150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94817a4d65415a5c1dc8cc27b26f5c2a8495bb49acf8853af32cdddb7d95cb1d. 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/DE1AO2210099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0babe35b804b00b45e529de8b7a134882c5ca00f83f701409e0943902722af5. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DE1AO2210151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd106c979b834417dfdcf6e2df3785dc5e88b346c980a35ac18848fb89c37c3e8. 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/DE1AO2210071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d989cb0a797086ed42d7e1b591183b5abf948217daec2af411ba1a99e7a7f58. 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/DE1AO2210083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94817a4d65415a5c1dc8cc27b26f5c2a8495bb49acf8853af32cdddb7d95cb1d. 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/DE1AO2210099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d989cb0a797086ed42d7e1b591183b5abf948217daec2af411ba1a99e7a7f58. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DE1AO2210083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd106c979b834417dfdcf6e2df3785dc5e88b346c980a35ac18848fb89c37c3e8. 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/DE1AO2210071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96423980b39fdac6105eb9bb5ddccc3ab546915cc04ed368b08eb03a44cd812. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DE1AO2210047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1d9b3af6a7560346afa21252a47cfda6349d0395c929487ad48a05147ba213. 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/DESD82000350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb40a750fe98183f30790f6c31fb3b9244ae02b20b5f8b1aa8f2ce5bae976aaa. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/DESD82000349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2111907f569f9a4a2d11b2b751c5d2a5a7af3ced5030814583c246d27b6cc9. 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/DESD82000348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3195c2f10f784a68d4b57a07b4cdefbc37fdea0345b4ff1e516ed3449d0f63c3. 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/DESD82000346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761fa9eb1df0c055798c5bb53345c7521c67434cc1435aeb1a32394f04bd0d49. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/DESD82000351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2111907f569f9a4a2d11b2b751c5d2a5a7af3ced5030814583c246d27b6cc9. 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/DESD82000348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5143b38d4fdda255327d06555544ee9967f545b76fa5d03c4cf07c9d03d1fc1f. 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/DESD82000356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3195c2f10f784a68d4b57a07b4cdefbc37fdea0345b4ff1e516ed3449d0f63c3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DESD82000346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce05889d13fa202a263e7049e5d1f121e139e0ec79dcc1b1bbe15ba7afeffa22. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/DELJ81921047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ab6b813d0ddcb2c0f0af21a669aa9d19205fe1996802072c10d19051d86100. 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/DELJ81916343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab23995b0173cc230e3277867059304f108791f145656d8bdc04244f05fde3b. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/DELJ81921048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf24dc94d67d91b4deb92f523ac14464d344b1d7156af36ad24d730891910e540. 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/DELJ81921049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1ce4cda07c21fb62d6c31fc819f154aba4460ecf9205852bbbb6303bf43f2b. 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/DELJ81813500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7cffb0019cb07501323ff99f46e11e8c99487451ae758ff249ed731bf738cda. 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/SE3OH1727544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x097afd6174a072f54544b2ced6961d4594cd1ef28f4bc7eb5abf4c14c3f09f89. 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/SE3OH1727545.