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 0x27ead64ffad7e2b5d78c26c7cf55569558fdc047ac01a7bcfa378d921a3e458d. 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/35f6f2d4-7f66-4ffc-96d5-320d098bbc80.json and https://artists.proofprofile.net/proofs/artist/35f6f2d4-7f66-4ffc-96d5-320d098bbc80.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 0x1f72607dce5b1a51b97c3eb4ee87fccbbbdd4a2dacaca8c17ecef132294409d2. 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/USHM21855623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298b656b32a10ddc549499d8afc3e2722b3b3584820bc3111c2e6cb03455c17b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZK6G2271357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66dedfacaa9a12b7413685967e1a01a64670afbba69d58d32fc0d2ddf878d4e8. 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/QZK6G2271366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3372f20a3d622518a4b198cbd410eb7f92f0fefcd9245f3028ad8b18d8667ce7. 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/QZK6G2271370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3e3037ec6dee2c01b31c462d731990792610ea121ab8fc004820f7ac7a9cee. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZK6G2271372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8c0998c80fe74c7c145fd5bb14cd63af0b27e33ef79705e62db85cfd752fba. 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/QZK6G2271377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7571da25b65669843844b3ee20855e4f39eeb9019d4df0513eef93164b7a48ea. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZK6G2271358.
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 0xe45bba130f799f407a0446f242ddfabe2c1d7ff5d5e4af91b3868b9a362d7c99. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZK6G2271359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96112d4d2a03b29e806629be9538d9771d8da819cec9f8081b9a96062f0131d3. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZK6G2271360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0c7888edead92545c5f1fffda4126efc549885862fe9a2886c4e88152fbc4f. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZK6G2271361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405a712a32b12af2bdbd9ec59ddd016b6dbee9269e7b56cd4b97cc57c4392a5a. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZK6G2271362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757c61c9be6eaf8352994c22b85da955e78f6c9d71ecb361ff61aa55056665ed. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/QZK6G2271365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ab8b413646f268a23dfe680a36d60d4040aef15c37b534ef8f32748694830f. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/QZK6G2271367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43bad5c61ed8eb2ab66b5678512339071d4ece05ede42c28719f456764b74aaa. 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/QZK6G2271368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753c6cfa7ee517f970e5638a2b2c4ae34e425f510d8126663ef4423317e1625c. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QZK6G2271374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dab9c8c863b185f6702d2f2595b341b9ae464375cc12f83d3af645b066b7dfd. 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/QZK6J2019468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b105ca21d7af5dc6188fa719caac9c6de116690beabe22d445db93c00698b8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM4TW2063820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0e95f41b3d7076a99ddbc41fd220b4326ffd147c44b8b31dd2f6ca41593321. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM4TW2063821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85bf8f915fed17eab9745f1ce8e8d49259c5303bd0bba4b6be7e5e6a44b84a49. 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/QM4TW2063822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f2ee1c5bc72fa19ff66b4f5762ea628192be0a7bced400f9aad8bc3d531cb8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM4TW2063823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadbbefe3c78b94fc2f9e2cbdd7dcbac5394544b8b866381757a59ac9cb0d9d0f. 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/QM4TW2063824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b424b640e2b3304df389fd0373180419ebfa59a843a44996960dd9a9af6d2ff. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM4TW2063825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60cc9cc4a6e0d36f82507959a243199ec1d5f83e7dc204578c9e25f65177fecf. 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/QM4TW2063826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0e96cb0088a2757bc4302af4f369a63af7ab1fef92ddced7c58080563b2308. 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/QM4TW2063827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2148793929844a4545b7f3fb8fbc7457445f7295a980204986af4bc26bef20. 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/QM4TW2063828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb56a9641f3363478c492477e8cd0b39c868bce75bb93d6b795502891dedcb87. 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/QM4TW2063829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808d8f763b8e36abcc4f0eefb086709b051d8d5662982315fc4b2cecc4e7c0f3. 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/QM4TW2063830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ffbbe7d7fe695e71ce42fe6678ee1e9646c7b36f5b6d0426a9308f29a11afe. 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/QM4TW2063831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1335904e0ef7411daf759e6462f0c2f15db0d6719a952b61b5e87ad130e4501a. 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/QM4TW2063832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84f1e23d7d7bdb66405026beff4d71a0e4b3b75d01bfbcbe8516b6993d704e2. 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/QM4TW2063833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf435f18b0890d77573c047288a8eed93dd0e79154f146f386a2ffd25c49fe42. 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/QM4TW2063834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d235b6a3c4b9044ace36f1a7f904596ffd319e3e7dba666557aca84b1895efb. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QM7282367578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbacf9c7e20e50b0cf30f753a191ceda917c49ca68eeeaa5f184d79697bce2600. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QMBZ92319070.