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 0xccfb4cbe83d31642aa2e7185f84ad4a38831867e5adf10ec3278ff0489c3f296. 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/834cae2e-ca55-429f-8b92-6bb7efe12b8e.json and https://artists.proofprofile.net/proofs/artist/834cae2e-ca55-429f-8b92-6bb7efe12b8e.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 0x208837701a4836df1a6f242fae93c7aa4558015ae767a2a0f46f9e103badd96b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USHM81860994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6166b4f93a05e84af5cef0f58f32fa2c36ea9fb1326a1f5abbd86798b82e07. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:35:08Z), 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/USDY41775108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3af8311635cf6d9519dde1d1fe0a8af13662e2420c84b347cf6b73326f02caf. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:42:59Z), 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/USDY41775116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866e919a5b36cfffc25efe7d831bf681aa8d8d315b95882cc3e492e6518797a8. 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/USDY41775120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e3b21f329faca802676e3d315adcabc7e37f1116f1ae9064ac682e1d1928ed. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/USHM21950813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf69f19863cfe998dc37752ceeb8787bee9fdb84c4b519c5d458c7535c9fac1. 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/USHM22099629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b79be12a603caa4d55f371a05cfe8dbcaf4a44fe90f1d0b9cfa9d77e6130ed. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:06:27Z), 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/USHM22099633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93cce923c4473b919a036f1cc9d47ee64786282971109c0136f1d4722bd5e4f5. 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/USCGH2138691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2601abf2345220a219c021903b61a5cfd797a26b3562f771670ce7d866684fb. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/USCGH2138699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aece738ede630707b7e029e09f44604c534285173dbf00048ff65cf80f91ad0. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/USCGH2172289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2929709616017f81da14fc8983545f415a95a2d84e8cdd31255b3d642be8cf1. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USCGJ2245906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c540984285bbdd850916c900b28f2c5a00eabcf39350b0bdfb487daaf5514c2. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USCGJ2245915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323fc90063d7afa125ce11cafdd941636205ed9913a0624d19b86a0b96ff8d62. 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/USCGJ2245916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18891ba1ee3767ae1d95585ac81410345414f2ee25c3a44afa5bf9fabe1ce970. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/USCGJ2245917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbeda99fd0a0d1024c6e2d6b63ed59a3eecfd6f412da273908b70d6e95de12f4. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USL4Q2268221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc60c13852dc3595e33b0da7bc6378ffeabf05489c3e9d287ea7cbf74db4830e. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:47:35Z), 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/USL4Q2268224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa546cd0642cf712efa74f041987aa5455e968b2dd09ac26e83c2b8ef4af4377d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USL4Q2268225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b3aa4bd3fadbeaaff1574ab38969a6aff896aa66c25e438712c7405c2c3cc9. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/USL4Q2268227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca7310dec56dfe628ec2a975f92f59ca0f36a72a77b468640b8d251238902d7. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:29:42Z), 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/USL4Q2268233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb99e794b18f298811074bd233aa6d156239ce9ff464912749242443dc64b4d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USL4Q2268235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca0f55b97c49037225ee5dd4ae1c9afc547e91b2ac4e4ebf1ae7343317cbbd7. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/USCGH2331402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40d3151c43544ae935c717ab962868e8cda97b15c6f7b8e0075d37791c5bd3e. 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/USCGJ2470145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf0768786aa40878a5bf1a11a737544aa14cb57ad55fab87a6e3140d1bfb61d. 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/USCGJ2470147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e049458d18b3ef06553a7d91a78b77b441b8dd267e0af7d736718d1b48033a. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-17T00:12:12Z), 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/USCGJ2470148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2197f0cb6833473da446f2c014be0fcc2e685668bb1b8c72ecf79adec45f08e. 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/USX9P2411984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x393f42c0af18014441201726934668b6c49e446e3227d4719d9538a965692bcc. 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/USCGH2535135.