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 0x3893728cabd8bc96541081c0315c9045131ed178f1cc7f9904c5e5704fc92b65. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c0110b00-1821-4bbd-a619-cd6e7a4408ad.json and https://artists.proofprofile.net/proofs/artist/c0110b00-1821-4bbd-a619-cd6e7a4408ad.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 0x5ef8eabfd5a47a12f9d2ab085b84cef0a47900cc2f0e6eac8f9e6bab860cc54e. 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/QZNJZ2302103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945b35a4706b5c3690a43310bd379ae00d3341389e38a26cb11f104d831d7f58. 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/QZNJZ2302105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc03e531362ffb862608101c440eddee4baffd1895fd71dfdbb583e231dac0d. 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/QZNJZ2302109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6270fdc657b727e66b337cae53f4411361a11f2ec30889ee96a3671181c14b. 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/QZNJZ2302111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c1c3b37dc694930db8545bd2e1bbd0e7d95865312db71334a5b28892ebc4b8a. 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/QZNJZ2302113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae45b087ee99951abe42e036968db57787ae72c4a89e3e7daef163e7efb0341. 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/QZNJZ2302114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a8fabdaa5d11247823e36f0c750ff9e78f50e901ff964bc463d2c463dd75b3. 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/QZNJZ2302117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f762e2f1d251b7bf3de14903c35abb82582ddf13496a6b1d7999479c0860cf2. 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/QZNJZ2302125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae45b087ee99951abe42e036968db57787ae72c4a89e3e7daef163e7efb0341. 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/QZNJZ2302114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc03e531362ffb862608101c440eddee4baffd1895fd71dfdbb583e231dac0d. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-21T16:42:07Z), 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/QZNJZ2302109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeddb55296eb3996fa803b4bc0e3a003875f70091f7924020613c2a9dc17781d. 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/QZ5AB2332209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa580129a2dfc8c3d8044975dfc5be5d7695dabdd963469032dfd7a479213ed33. 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/QZW9M2279760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb2331edd9fa51b8c3eef1bf40953b92fec643ecbccdca4bb9b51b03cd52f21. 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/ES18B2102113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb4a43ed9b2fa3bb74bbce045c68aac2e9f47ad197ade8b01f7d8567be70109. 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/QZW9L2217929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28825241cf7d28337f9cf6242f96dedc149c7f6f89187948be93c5926d94b591. 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/BK4DA2500698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc784279f3d1fbf21497c58e5e20fd63f4d33ecf23cefade11cc857757e9f896. 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/QZW9K2483862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6a250fc53af7e64b14927c8780c70c19b70d0e559bb79edeaf3fb9f80af8d4. 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/QZHZ62275750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17397df08e6151729c819e9b5161a1d167331f3aab5ca1fc1f79d2458f6aaa86. 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/QZHZ32214118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0761c3976ee2fb14360b66e9085847b7eb2d421fc5c2e8a4c3755c07212214b5. 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/QZNJV2110953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215d5cccf68222e9aad5d446922c4cac4daa1ac0234bbd3c969888317239eb43. 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/QZES82175097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e302785a468cb72b29ec05d355cacb3a87f7d76196becfb294b6c60af5518b. 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/ES71G2415579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4845ab9dee8c117e9d5043fdc9d7a452805d54d715ad30d9ca62e3ccfc8cb0d. 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/ES71G2415585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94bf0d43f4368c2c1f0271e56a41280dfc209c3573ac1d39100c3d9671a644b. 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/ES71G2409820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29cafdf4c060b924a085866502c20b10a666f80a0c300c11f6791bc2f2f24771. 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/ES71G2415583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176323ee2471b20256c764aa176f85874dd97fa623fb1f74ec9938ef8d6bba01. 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/ES71G2415580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a82ce1ad597996fc014b56e2a7dcdb7b60ae7d166e5a44ce77f06ef2141f77a. 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/ES71G2415586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ed677a18ed986607ba472b1fb463d3884ac236b979360e2252225aa36bbd80. 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/ES71G2403096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013cda3405088f28b831f9b8a18b101c6cab59b47c2e8e79bcafe59305296918. 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/ES71G2415582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ebab9e2ef36c396877d1b68dfa08be7a23ea82f41464937853a668d40f5093f. 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/ES71G2415578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79276d73e370aa528741b52997b9d43fc4696ad02a686b1735fe64eddd0dd7dd. 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/ES71G2412759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df1a650e48f960015c564085d7700df31daf78257f1e5b88b1dd74b30f3f4c9. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/ES71G2415584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd095d9023f65638ace74c4363772f62711669b48bd653f86eda77f4fdb5116. 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/ES71G2408513.