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 0xad08a0ba69a364bb365f5df1e202711eb75de8ae4441a1b4b45318ff1df92af3. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c502840e-7733-401c-a716-7f42f042e30d.json and https://artists.proofprofile.net/proofs/artist/c502840e-7733-401c-a716-7f42f042e30d.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 0xf52c8e3e60078427a39d7de16ac5d44e8f6e469f5829b3854d339f23b6777940. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/TCADL1872727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63d41a90c07d8e9bf7343be9225c22091cdce55d4c98d4ef13d8a44687f2884. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:18:04Z), 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/TCADL1872729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8209c0dd1e9b35e204e632b959d5163d4140cca65fb7de115ce568f4447511a5. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:01:17Z), 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/TCADL1879701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418dbdc90038a7d6312649e7dbc88bc86c22ca9b43d8ad70d8bc6a2b32299d0e. Chain 2 (Bitcoin): anchored in block 956426 (2026-07-17T08:50:57Z), 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/TCADA1725258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11fdee0899368fe1cb8134118c5e2e7a2f9f1979bfaa3d3e11ece5573604c120. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCADA1725259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc53b6c9db69e813305f608f175bd59788fa4539784bac98ddfcb1e7b1fb953. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCADU1887802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1589606eb03b3242cd0585e60f9e8b7a7bd43c30385c8efab6902fcd18286544. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/TCAEP2047056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46745c5e3179785f82cd24821f4dcc69b22e09866f80042c4c3909ec4012efe0. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:35:52Z), 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/TCAEW2081753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63c7278272ae9bbb32776c95792ff386a7b0c6ada0830033afcc4a7f7dd7a30. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/TCAIS2465585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed0b97f8b8dad1ad93016a29913894c9e8c41209a638042385f7f694bcbeae7. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/TCAJD2478041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f8348ffcab98cfa55a4f7a52050b29fe8228ce8e22b88f74773d277fe41852. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/TCAJI2576834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d3a55c52ea7b7fddb6c6877948670e467041745c4317fd5f6774fa5a8ca9b1. 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/TCAJL2504959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b94e2e5e478010099cc6bb5b0ec93f71050446dcc14d88df82fac43a4f74ee. 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/TCAJO2539278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x707ffa6b32da9eb3702500aae6ba5c098b06de41795d9aa424bf05dcab4cdaaf. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAJX2575376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ead3cf1947346f956ef6dd77605ed804ef72ba2dea14d77e6df192fceb2a49. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:36:10Z), 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/QT6622515743.