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 0x07aa962492a72ad9c782b35f4ac6757e21c8beb7af9d605a10b5d211046c1440. 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/a3c1c7af-ff26-407f-9608-74a72c9d8008.json and https://artists.proofprofile.net/proofs/artist/a3c1c7af-ff26-407f-9608-74a72c9d8008.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 0x1fe2bb993fa27f8ccc18b2b8a54aa61196651dbe7418413390e5d37a988b9f7e. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/SE5BU1787469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fac2b054ac6c6243117a89b3de4a5ffd126a7d3a1d662b855a821cb8554f5bb. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SE5BU1708403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e4019b36f316a82a1a5fbba06b5175c401cdba3d58e50c5928a6572e79b1d1. 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/SE5BU1785352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf26277438bdf544abcd5b2f993b50b4cb7f74d7e0aa73b05d7626acb7a0bed. 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/SE5BU1871435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d6d9abd73ddd738046c99dfb84f041913a8a0f9201d9bc79bcaa942521c8cef. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZDA71906271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x349638edddaa93e3a29686a5dfaed519c736773880dd71ff6375dfa7168052f6. 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/QZFZ32052920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d803a1e7c1161a281acaf1c2d036ad757fb5ae5966b60335923311c8678dcce. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZHN82078983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa570949d59d9d092c40674bae9b5c0be1898dfc5947da39be68fc5638f5325ad. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QZHN82078984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f02a13e6a33b319bf730f84110d8baa36c62662e05607d9cfc2451adfc1516a. 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/QZHN82078988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf183592f00156667381326195b6ed2434a91ab8bcf6045dd5b76517a55b66a7a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHN82078994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde3d83e3a372c6f15866030f331c6124f4b60830c4ce896677fe2d831b650263. 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/QZHN82078995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c93ed6ab8cc7fb976e1b79eaa5e15a8a0145f50516e2de2afd05609fecd4d5. Chain 2 (Bitcoin): anchored in block 957690 (2026-07-12T10:16:40Z), 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/QZHN82078997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea5c2330abcfbeb0752f91e1c8c26333fa55967c412346227296def7af61b1d. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/UKZGC2200768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe060c3c5d54ff2b6f8ca7596f515544ed038fb516581bd6c5babfa9c1a87eeff. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/UKZGC2200769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ca1e199092123c4d83a5ec92117261f6295ffb3415d3ef9be9bdf7add05108. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/UKZGC2200771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076cb4d7672eed0aaf56b0d40a8eefab5400ee81ab0361998bb882eb686e9f14. Chain 2 (Bitcoin): anchored in block 959138 (2026-07-22T14:10:55Z), 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/UKZGC2302611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea6305ec30ce48575d3f14333cb81f10227aee18176a60215707c46beab9b7d. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/UKZGC2303872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x986102a2caff32fcf9a4300a2403e0faa5faed6c3f236b8f0ccfc9d14596e6b6. 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/UKZGC2306064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbcb46888d3b8f0f821d3e28c0fade5730b8039ce8e054d91302a6e1bbf360cc. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/UKZGC2307602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea6305ec30ce48575d3f14333cb81f10227aee18176a60215707c46beab9b7d. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/UKZGC2303872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076cb4d7672eed0aaf56b0d40a8eefab5400ee81ab0361998bb882eb686e9f14. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/UKZGC2302611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8b6e1d4974c61f6929c41d7c144a0e26cf9b82624d49aba6ceec0457d7f505. 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/GBSMU6545799.