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 0xbfe83d727e86e9e1e30e2aa09d8a9feee32c373abf95d1785cd437f4fe684b35. 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/f5c36c4a-27aa-412b-9271-4355bc53e154.json and https://artists.proofprofile.net/proofs/artist/f5c36c4a-27aa-412b-9271-4355bc53e154.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 0xce0ae8fe406da95faaacf79677058a075792e501d14051c5a8159813f1bd8f94. 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/ZA56E2002265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68bfe32a1b7a378ef05013f3d4a2e0f7b4d44815ee2485338c9168af89df263. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:57:11Z), 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/ZA56E2002318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f054182a2250d0ccc32a3a06765d2cd90bc75f46e998b20f9f9f7e4f690ff38. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:45:05Z), 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/ZA56E2002319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2ce0f06df72da9ec0f872ae4e57954955ff0facfb57048f033f1a127487a88. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T19:55:12Z), 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/ZA56E2002320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1cbef5e0481a75de1dcc8d4dc6f0b4ea6be001a34a55da40684b675b81d84ef. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ZA56E2102089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab7eb11fec7ce50dada14900493bc65778def06f7454a928682fc77fde7a9be. 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/ZA56E2102090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e19329b2c625e8fe99648f65a6cdae6bda5d1f2c4a7049559b5c0334c6045d5. 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/ZA56E2102091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2fb26436bc4d0acee2984a8a9acdba6442a0843881a14403bee1d6edb099323. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/ZA56E2201700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3572ac1102c5d7a7be92ee8a64f55de9d2627288796e5d01a9c1de1c4f5d27. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T02:34:25Z), 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/QZWFL2397484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb2d1ddd46cd9e980a433e9e145948c5f8ef936f36211db5220f6517280d5efc. 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/QZFZ62453288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779407a590a0e59e80ffc2ea039f44724080a0e916b48ec653c1731741cb0430. 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/QZES92468327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a6fe0f3845d217cbb24e281bc0500583913ea90886d86d4539c63253a81870. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T02:23:48Z), 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/ZA56E2416513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6208dfd130380ff2f421211a6a870be9c1f39ce3423132799703830d0c9d124. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/ZA56E2416517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeafa7f7424a34b5ca9d5c43cf750a7b7a7e97613e184dee6d28fa48bc1cc00fd. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZN882416823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ece2eee2a523e30fa3faac258ed0d4ae389eca1907707bee1053ca384f51cf0. 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/TCAHU2451322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49db82afba45554277671b700eb9ac1e399029d37a849b8ba30e1653239d2b3. 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/TCAHT2497576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d56cd57afec55ccdb738fbe63ee724e5ae0efe403888615b90e769c3c30ebb3. 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/TCAHD2363093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49125cae395ef9db263028f110ba2ec3d352c72d4d6c9a673b2313e98ed5e153. 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/QZNJX2479055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49125cae395ef9db263028f110ba2ec3d352c72d4d6c9a673b2313e98ed5e153. 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/QZNJX2479055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4066b36aaaa72fd3dff8ba94cac59f8e3606f5e19645539f305f842a083bfdf1. 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/TCAIF2473025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996d94f31ba9b3e84f9389fef273f6b50a7b4ff8a3b3de2c20a18c2148eae431. 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/TCAIG2473529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa814ae1a2f75ecbd77e26af04af43d08577a3619d024a5f606835a5a6b21e3c5. 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/TCAIF2473538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81cbb3a3bf1bcab98eb2f45d1244d1e42322119bb6ece8e157c56694eddbe52a. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/TCAIF2473572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda7ba198a919d9447ab5c2740a1fbfdd5ce2862ed6096edb49a1267cb09f914. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/TCAIF2473604.
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