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 0xbf9ab10c3af18f871fb611f0c2f7abf59997ff62f8f7231fb9e53d30c5fc0bfd. 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/d49757a5-954e-43a1-b70e-3b73890836f3.json and https://artists.proofprofile.net/proofs/artist/d49757a5-954e-43a1-b70e-3b73890836f3.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 0xef8531f45b60efdef0ff59adefc3b049169e429e5b6a5216b431269fd3ddad29. 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/QZGLM2064075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0604d3d9ed59e5e3900fea3c533d6cbaab0e5327b2e23b437c4fafd0111ed30. 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/QZGLM2064076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce3ca508bb73b185a4c71e1ae1bb4428ea330595efc2626b3a472833ec52ccbd. 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/QZGLM2064077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0ba4f4dc216d2a4efc3e4a74008cefbd05b4101d26a10b6e68564b70e7a81f. 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/QZGLM2064078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b0e68ad1f7ee9a7d4fe02e2e4320607895b19434c3aa9e97421582e9bbab8b8. 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/QZGLM2064079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f588143ad365a101b52211c7bb825662901f606d6ae227b499e5705ce0861e. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZGLM2064080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae25d3fa1d9ee22e6debfce6075d45b6ce8add543848b719777bf14333155a3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZGLM2064084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537034deeb2ca80ad818222a97827d11d462fbb3a3c215140d3f372719de13e3. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/QZGLM2064085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50155839299f267c1ad7dd060437c2106d0e70fa3b2508c0300b747549b289cd. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZGLM2064081.
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 0x2925d3a6477d015a6483b5ae2fc654e61b96507e167f793aa213e2cf25a44afb. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZGLM2064082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5829428446824ce1e00866569cbd14c98127c939dd85daa8d06108c0702270a1. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZGLM2064083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6453ea343da0441a87996343e66da1ec5138726b088b4e2b959832b21410e0b. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QZMHM2046366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5db2b482e6797048c74fc740e5a09eddaf2a8a70b1a6fc045d3fd9dcb8b997. 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/QZMHL2040672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851e4e8c51447c856c65e64d00ce15434c72764d6a9f347411044e34aadf91a7. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZMHL2020781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164285e4bf85fa89a15abd288e339b4f635aa0c3a6a8b250e32d6d63bab09dff. 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/QZMHN2046580.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca594a96e25731128f9169f62b22247c45400c0d7eca1ae9a9909195d49f10ec. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:05:28Z), 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/QZNJX2457101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535376721eaa404a05c9293124a08c5e2a834b6d49587e499c994f911474324a. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZNJZ2409072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10dbd959adecf258621bd8e33ebe7af19b6c062faa001779dd6e660ee1a36b9. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZNJZ2408856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3b4093db7294e7428a4e7831f1d4b7359eb86077378f36625b4ab8e6f2f21c. 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/QZTPX2475119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80fc5270cc2ddef1f3d7c4a1ef43490503312304e4581a23b7335418131d5928. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTPX2475114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253b9a4e965db22c7865ad7bc232ab01c78dc76d95d75b8c6e043f31d7b8fc61. 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/QZTVM2411576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3786a80d6068f6b4dcea1460236437dbaad5c3f5c1a70c6f17e9cbbfe635f0. 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/QZTPX2475131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2277a8423034103972f978a201b2608fefa616d839443863dc80178ea2c8b13a. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZMEM2586910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08fc9040f01fdd584931f6968614a01c9c15d570ce844fe8b4840e814ed17b0d. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:24:27Z), 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/QZMEN2596695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2fac567a604071a1859f07728304b78835d195378aabd25d2762bc0f71b47a6. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:31:07Z), 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/QZMEN2598625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x117a09853343390da8510da5d1c20da6fcdc61c3d7b07369b277ec6d72dd815a. 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/QZNJV2576564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf645ad2867f80221dd7704f8ed059ef44264005e78b021dda3629a0dd4bb0f5. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZMZ92514757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705ee1b00e2f6eeaf2b2f79b61d13b24d5290f645c5394dcce47f19c6da2b670. 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/QZMEN2525370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3936b48a767586bbf3db99c14368deaa344145ba1c1cb994b0a20c0c76896eed. 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/QZNJW2501451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2542fb87e68bb6c491d59587efca1b36d4855329cbfb7a09c10f52be21158c90. 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/QZMEN2584675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434d3c22274bb8cdc03b64c8a5e3f6cfa79168bdb5ba0296e2b161b5e5e7a429. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:15:34Z), 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/QZZ7V2512422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadec9771c559e3195070ddabb4dc0334138f56f5942a27b66093602a5e2878c6. 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/QZTPX2582270.