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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9cb94387e1ee1a666f29793befdc3bb0e4fd871f02e511a7fc8d76a63a03ed2. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9a82f589-2a3d-4a48-ba98-1518476297ed.json and https://artists.proofprofile.net/proofs/artist/9a82f589-2a3d-4a48-ba98-1518476297ed.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e962f19efb6ff1a8a7c5618f6f656080ef4e59d90deeb10ddba29fa9ef4ea8. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:50:15Z), 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/CZA231200180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c45995c7d4da0e32ac37edd8326fcc991d888879450a16a4a507071af83f16. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:07:37Z), 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/CZA231200181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f5455afba23e8df0c586670f6a1ffe8b3a51bd1038c97afb47e5d52237f729. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CZA231200182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd00a5ecfdf9a92379f6c705256f65c21f9cfbfff865ec15fd1136962618fb75. 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/CZA231200183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0e87f9a2890f7c82b8826d295dda870f63181956901cc8ee168ac5cc509542. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/CZA231200185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8165d8f785123b88be4770281c03201048b3387a84f4345be6a9697061b1682. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/CZW851400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3255a6044ee29199fd9096b83b4013058631664a5eaeef9d0df1c8071d2a7b6e. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/CZW851400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4434db7363770c1bc4fe431d06532c2d40b4e60b3b02533ebd7a73b3df2be4a2. Chain 2 (Bitcoin): anchored in block 956485 (2026-07-03T10:53:04Z), 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/CZW851400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x280e7d68b89b162b9116a99ce75482c92dda26ccc946ca30016e8f6277922468. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/CZW851400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb876626dfe657f09ce38d92a3efb1f58471e13c02125fde4868060439ea5c90. 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/CZW851800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8003859254bb9b20f8e2cc9ebabf379312105036a9cddd47cd64fb06d25a07e. 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/CZW851800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16288cd28e62c2455f68d3fd7b9c1162fd45ccca3682ea26f3d1c8557616916b. 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/CZUM72000920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc0287ff1e1d6eb5fa2be2d6103e58f11ef5239d5c33ae3907a93686b70d1bf6. 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/CZUM72200155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb7f3b80440974ef7e0095e94634d5e408c9f38420f747155d163567618adfc. 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/CZUM72201044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabed79cda7d84fbd5db76d116c43b7763b5ef80c51e1a6136b0782d99720c79e. 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/CZUM72201045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a2751caceec5005fc3b46fa9ef10dc160c4baa502d60dc7e829106eb2ac15b. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/CZUM72201046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2ca9e7e07913c731b6712ba6d7055ecdacc825e27e1823aefb8779ef11a204. Chain 2 (Bitcoin): anchored in block 957830 (2026-07-13T09:15:55Z), 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/CZUM72201047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b03cea74e5749795b1e48e7ccbe87cec1f759605a08009c1d726237ca0496c. 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/CZUM72100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x969b3893b5764586ca940294b603339c453c1817e3bab63d22d9360b718fea47. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/CZUM72201049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c6209e1ebfe1947c990e859375ef7c26340b74aa6725f9afec35289ad68e17d. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/CZUM72400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e0cc6ba4b2e3e53d6e70b14d572f9d40dae4e1bbadbf6abfaa57b18c366d75. 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/CZUM72500102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0f6f9aa3a510984167337106b2c0b5abb164aabb4124b84a5bcf164ad0966f. 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/CZUM72500423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffdfc5ee4adc3327cf572f26ff713d836a65bdc6cf2667fe8f7298d94b716808. 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/CZUM72500424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf3f7bb8a7c96f7a0436f363edbaf261664b8b7656632f6ba1357354258a5fa. 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/CZUM72500425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6176f9e9cc90c57688106fa7487b297d09dc3aaba0fe3495db36a35b83251b60. 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/CZUM72500426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444cc656db61ef7a986268bc134ca767133b7daaf6b7298f8cdaeda4a9edc482. 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/CZUM72500474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd3496b5f0d939e9b02323a91df0b7306c358a0aab4b5181896511fc6b361485. 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/CZUM72500427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0adabc3903c444da05655c6ccf71d46812aab6fed35e17288cc3780ee6b988. 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/CZUM72500473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff19e87dce40708e8e0c0eddd4cbe3d29ef47c5c7162c70e782e10e7b2fcc58. 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/CZUM72500429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb367d3070028c50137610394e3e1e67dd72eacc0e16458266ca4301254820cd0. 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/CZUM72500430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf3f7bb8a7c96f7a0436f363edbaf261664b8b7656632f6ba1357354258a5fa. 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/CZUM72500425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb088d27a7f2898cf7bfc6a6cfc69bc91a1f2d23e045d477fcd325dd4f8305976. 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/QMFMG1319146.