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 0x00fc8946e40b85614c98600c2b09c119b811e698516a6e2f12130ef18d1e6a34. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0803b67f-7c74-413b-ab98-11be8de1a21a.json and https://artists.proofprofile.net/proofs/artist/0803b67f-7c74-413b-ab98-11be8de1a21a.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 0x27495951a848ddc8fa66586d1fa11295aae96775763167a24411d24a303e84ad. 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/TWCC32321520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68cdad3380e0282072f02498ecb46eb8a06e87059a2fd3ec016934cba6794cff. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/TWCC32321522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc0e164a00c5c3f1cd503a83f5dc08676371d67d65ce808aeefce2d974e339b. 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/TWCC32321523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe26e9c0c105fbd4b50a81b605e10d59d0fc18b39c27a7a356ef6cae3a84742. 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/TWCC32321526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fac82109090624ab66b83367dd94e9f3b0787196b1dad34ce7d0d7521f7ad29. 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/TWCC32321527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31cb0b867732c2ee546e446532be1d8769c61462fab96b5d15ec8d44daccfbc9. 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/TWCC32321528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5691e37512e848a3277532ea28c7200bd4cbbc9daba11682f49feaf695c80a37. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/TWCC32321521.
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 0x8759bc5da53b8400cdacc340125b3a7feef37f7bcfa1519093c367734a9a2060. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/TWCC32321524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c334490e5fdbade4c2ee13f7660922c951b9bae8ae8d7229a2fc05455a5764. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/TWCC32321525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bfe59899ace66bb4b314171af775113ee0e0c0e5a19eab59689a91e7b336ad9. 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/TWCC32301661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2b984b56e18801c312c033bcbba1f7406d288f097aed6912f75cd705b1e889. 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/TWCC32301663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac05d23e68b54f2077a097d4a2aff4b157b31c36ab13a4678aee433fdd870b9. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:22:31Z), 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/TWCC32301660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60de76f4d76c5deba751b825c7cfa60cab63b78ebcd528bf12dcce6a06256cac. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/TWCC32301358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9db6835d88672463d7dfda078a6403623ee0ca9d1fb7c724d1aedb6d75b5966. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/TWCC32301359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d0f981e2d10a6f111b0d41e69e675794f8c6ca52bd2f5095d6cd72801016a2. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/TWCC32301659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9e2de23adc001f0fd7bfc55c521d536a964f4aa0c3e066f08055e2f6172eb5. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/TWCC32301662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63397298c631ba246a12d4cad67c6e892797d6d141486bb69afa40ed16d51025. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/TWCC32301664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546b7206e479da8bfc3d2e7e54ecffda19bfdbe4cf0cab3aeb858d5bc2f4f620. 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/TWCC32414429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ddedcfe587049e85f9651512d131ba78994d035973cab16d75c9f2db9578e2. 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/TWCC32412222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8894723fb471cbad4bdfe1358a895db325599839bcada89525a40275fb18289f. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TWCC32402951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e2871b6fe5f78d7b93fbc8f9bb9429504b330f0463c5ea42f2d3f1455ac258. 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/TWCC32402952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7cea8d44233111bd373fd4e3a9f00713aed22844ce32100b06e2d2b308ebd38. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TWCC32402953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61e856eef01148e4e95cc83fbe90a4055a0c5b0b2d72161727a6f0184f8c06b. 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/TWCC32402954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaec2ce6d068629608cd8d707727b006dc0dfd7730d45ee3a72d17307211c38e. 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/TWCC32402301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6e3f20ee296741d1a817defc1cec7ff36b16b615babe4ba33a3128c1e637fa. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:59:39Z), 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/TWCC32402304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4e2b48a5c9ec80877363b464d183d36960938ee2386e9f310ac5ef635716e0. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/TWCC32402299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1804011ae45dc89ded574fc68651f5c9b9b5e97e05e527a8f2624a6f97be00. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/TWCC32402300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0738ed52e8a19bbce7446abbef488f6d46914e364815ba6953cd637681c0822a. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/TWCC32402302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08beaeb0a374c0c8c382c59ee9c66ac92a2cb3ba5656dabb7f396d21617a0145. 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/TWCC32402303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6aa4c02c46ece6d92cdfb077d60b55d4c456637d25f61637ad23e760158a1b. 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/CAGOO2353925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x072019dc6625d5c8020ba726a09fb493fc253eab4dfc37a317fd662d5fc581e0. 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/TWCC32213837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa35ffc662f2534702373d2de9975399f763187bcc65a633d5fa6b6a446ef2cb4. 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/QZMHP2307087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04206291bd6668642432ded56030b6a10187c1950944283e8b31e47ed9d975f. 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/QZMHM2340986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d7c5f7e761ab09041eebcabf0abb8a0575d92f8fe2ee97e3ea4c265d5d50ef9. 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/QZS642379119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a0ceb5db2b24b211f7f1b3d844ce86cd66e1f51739ed392859fe44ceb91bf6. 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/QZMHM2329538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd607a176c3ee564881b76b40b7fc2b56bb36e3436866609960b2ced7eb4fcdd5. 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/QZMHL2399231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d19ea32d5bfc41491492cb9a6db990eb9e57e2eaefeb9038a79a0019ab8e1ca. 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/QZS632359970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea13647c4250a91492f2d3656d3494905da7db028bea3bc28b397b5d2fca6e4. 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/QZS632342542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b9bfda106d5379b976c654ccf2bbd4cbc2226cf268d9387ca66e7deae104376. 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/QZMHN2354679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4621a8f5517c168e543938ffec79830c00dc373ac369804abc25db2ea6f85b. 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/QZMHM2374644.