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 0x3fc246a32cc016210ac8ed563ecb931527eae25a1616b2ec0df973079e098f34. 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/cea5ea81-7f12-4299-b92f-06c71a5633c1.json and https://artists.proofprofile.net/proofs/artist/cea5ea81-7f12-4299-b92f-06c71a5633c1.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 0x35ddf537ef3e4d6a2868c5a20eea6fef9657296954df4c0af790788b39b504dd. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/TCAIC2438080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf86191ab5670da1310ae89288cb4389159c82311f06080d265e5df81b8c8aa0. 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/TCAIC2438084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53b6fd376093ac41ca3437da4571f2c2afaee34d01757fbbd1dfdc111a67366. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/TCAIC2438094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171a2cb1917efb136b7a7ef9ebd49fbe3c2ca6e50b83e69b9fdcc898b36a714d. 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/TCAIC2438096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3afb3d4319f39f2150133c21bb696136dc1a5cfa0087d2c1e628fec9b6d9f9e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ES71G1912950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd1806a15cba4abda4d0106443c4073363a815dcaa064629943916d0424f24a. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/ES71G1912943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ecbabfdc5ba107e8cd411fde8292c10d9a93d7fec7f4b8ded5bd0495393f2fe. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/ES71G1912947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa1fb89aaa1da24263c0cbc184ec6a4e78ca1afa7d9ee6891ebd95b07b08bb2. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/ES71G1912901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc992a12b36e253b84911128cd6d7529c8078402619d5065b89640f2f06ef221f. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/ES71G1912906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa175bb0e34b3e8e5fdc9e6c4a50834add7a5208c84eac4ef22b983bdeca1d223. 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/TCAID2438143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a02fe45ad3f9447d2405c969c89d9db430ce7da666a1d8c89f491639922f1f. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/TCAID2438151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafdf4376a0351b973d3e9ce55ac15c6667fd1e8603a39ff6172ab13582929d5f. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/ES71G1912881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ec69ff1596cf2662652461d62caa72169a606d504238f3b4df06565e3bc47c. 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/ES71G2241069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd326fc3ec92c7f2b91181a512673d36d1c0dcb19fffaef2e03e5002f6ae24a. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/ES71G2416550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6cf9ba3113ffe6a093532390c3341c37850a7618f9a327475f4204b22a119e. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZN882531661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbcf05fb19c4c3150348436edb3a8362e93ffeb487fe8130a99f3143ad8ccd7a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZN882531662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23a4618c94c570523469bcc943838ceb4268b21cfa3b780d58f6eafd5de479a. 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/QZN882531664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d885545cc5d3c6dd2584580d398731b14eb36fd387ec84a286311a50fb7ce4. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/QZN882531665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb807e19a7a05f2ecf88f056e81273ceaff60ae35c5cb59f11fe61b859df4a624. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T13:24:39Z), 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/QZN882531667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774cfadb280c8cbb3e15e9e52e0168840b7dabfe5953ff37710f31865ab8eabd. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/QZN882531669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ead85a5e36d81329479c03a4e19680d4802ef826c10f097b4483ba8717f8c68. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/QZN882531670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf6d0a72dfa24368e9940e20cd0f4c81ffa09bc6f430b5222286ac5e2e022ebe. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNJV2216141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe28fd9e95aa768999a22498510784ad97f965550e5da06ff20639c749750d19. 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/QZNJV2216142.