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 0xdcc739634d569b334bd1f34891ccb551bd497d09d97611a0967eb891147aa1b0. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a2619533-08a6-4bed-bc17-01db0e97f798.json and https://artists.proofprofile.net/proofs/artist/a2619533-08a6-4bed-bc17-01db0e97f798.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 0x6603dfd5357f82b51bfad9efe8e477a0ce1186ec0c94f49c1cca780ed74eddbf. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTB22538659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118e7634a22eab4532de8ad1bb8efcef7b60d329c0b471850709dcd09e59c2ea. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZTB22538660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb543257525935df1b1ede8645cdd4d26daf9962a70c255609c4b90df4f160a01. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QZTB22538661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcea634495a1d8cad8b7b4ec06f707fc290b825912dcb5c964a54032546e3a5b. 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/QZTB22538662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd2cb026140deeee2ab264a4de16d7b4757450df19349902bb57a40702a1725. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QZTB22538663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7538a7ce2de1a21fc843c7ee5dd42e67beb5f084e2d2e4026c424e27b6bc58. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/QZTB22538664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ac5c94e0beb85ff1c6c3ed187de7e2f07a622c6d2cbba139c494f7b11f8b84. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZTB22587757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa1d7b324db4a7a45916827a6585297994b7d01881d145ca6df2239e8c88512. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZTB22587758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb294d28f8ef8a8f760745f7aa487bb9f75547712ad3f9194b7ac5628da056ce2. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZTB22587759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d8e1967f5554a90c7b8d10f384566a0b1b6307b82d0bb71fe2e5809fac1811. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZTB22587760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d11ae97dde33239c22177ef8767a1b24227b4e05338f870daf34dcd73063df6. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZTB22587761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c232442975ccebbbed3ad0570ef76c4e05f16e75a4b81a2c84e2847e31e25d. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZTB22587762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10b4da5c280fa32f78cce864eb4dd3bcd7306a8d68c772583fe3d20c181fd72. 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/QZTB32581577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf46f59b2263b56918c9de24c1425758c81c5a0565901ff6a36f4397e78b68e. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZTB32581578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6e4bdeddc6ba653150b302ccf192d5668f36afbb2a849ceacc7a5b198e0f8f. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZTB32581579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3ddf02f5ed09330eed7bee818d6e1bf126ff5e89ef3919907259942876a002. 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/QZTB32581580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c48143933e1fa51bc4c48b24a50947782b3e0de262150173b3815161853fb7e. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZTB32581581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x236e469bb41a1a24eda300f3cffa379f582ebfb6747181e4e8516b799117d32e. 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/QZTB32593869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacea6b956c4c7f350999f6bbc476a7539110468b3ba1c4c6cbe5dabb92e9c241. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZTB22536613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x675429f9bbeb0c10bd36acea090a14a7b816af42bcbcf39b5a44c619dafdc642. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTB32593870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c46a2999977d77cc06e945aa5b7b71d9f4ec4758c8370479d36cd53f5a95c3c. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QZTB32593871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d94f831c887458a6617915e80f91e97d3f8b59b5d708754ad5829cdf2b3eee. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZTB32593872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c2f882fecd2f2309a1512a0ce1af682da646c4faca5d37fa7d9d3cce7d0d5a. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZZ7V2518520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe708939de340e08ade2445a6c6dd14a455ada90e6de0041decb3d3de329eca53. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZZ7V2518521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a53312d8b03fabe737ff1d10afe16a3c14ae672db2b7b90fe9b3ccecdd9662e. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZZ7V2518522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08001bf30bef87f818066eacf490409191b58fba3690b08cf640f520ac6729a6. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZZ7V2518523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b032d468db4ae4210090cf2be2e16b987819679bc5beecabdf731b8deea65f8. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZZ7V2518524.