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 0x76186faf270d721549c3119a59b18da63e6572f8aaf89ec5572609beccb7da07. 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/8cfd35cd-9af7-43c4-a0cf-833f24ec5125.json and https://artists.proofprofile.net/proofs/artist/8cfd35cd-9af7-43c4-a0cf-833f24ec5125.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 0x557a053871921b70d25590eee09058666ae7f05f162be08d23bf140210c01573. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/DEQ121746235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad8871cc0396eac78592c7747f02d403d9060f2828fff12ed047e3dc671ef9a. 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/DEQ121746236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd7540400d738856c0aa7cafa7c3c546b02294c060f9630578bf3ec0b706070. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/DEQ121746237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae011ba1b1ffa28b0990762cadd3f9b738a98baf02045cb2e6c36e698f10bef7. 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/DEQ121746238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079ec6477000e1e1bdf825861c34979659bf9a24987270243793edc1ee8c9bf9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEQ121746239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc12cac08b9329809d1223e21c26abda9292d8f13cd8ac8b0c3ebc7bdd765b4. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:10:53Z), 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/DEQ121746247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x905397ddaa0563dff123e91586a9cec4a2bfcc490c82a4823b683fe5b8ff3bdb. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEQ121746248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701ed9ec684c2a229eec56d38e6d46dce93a4b9806466c2e83477068d4609e69. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/DEQ121746249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d3c7001958b8625493bd01be551b5cd3e2bd39911d10290db443e57140d1ae. 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/DEQ121746253.
Expedition, Vol. 1 - 15420 Ways to Die, but the Weed Ain't One
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf1eec20eed1808fb04fcd163376333129d16226bee179d21db519bdb35b2bf. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEQ121745714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e1aad8bb90d66158a2e39a99b16d0b4d761ccb479f37f6a62d533ebaf09c0a. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:27:18Z), 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/DEQ121745718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346ba2054f039bb4e722ff88be5a7b07e8f6ae3da11cb4cca7706aa7960c8411. 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/DEQ121745722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09219ad5bb5c97306fd7d79aca9882baa9c349c2b0dd5488c1c7108678918f4. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:47:29Z), 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/DEQ121745723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778f8c88b471a359130fc1c4e6ad862cc57c259b1b1627dac122525fc68ff7bc. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/DEQ121745724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb317e414690fa06cd3e219477917490472fdf81395283b32e749c76841470767. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/DEQ121745725.
EXPEDITion, Vol. 15: 420 Ways to Die, but the Weed Ain't One
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06ab474ac27a87041943f0511f548cda28721927e78aded70cbf4eb8fbda26f. 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/GBLPF0262153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76dff9492457253e5e70df62105c56b4732eb5487ad989fc7ed6d4007318dae3. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:46:19Z), 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/GBLPF0263776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219e19ae2adfe30980353aceaeb3923ba662b26132940ab2daa8f3bb3a4f8b13. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T15:31:43Z), 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/DEQ022011815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc2f334e70a11f0955ae28965250ce7091bbe1eb93d27fb483186a8a16738df. 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/DEQ022011820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f68b4847651a366e0f9d04536150fff613cd45fa76b192df8faf12c1888707. 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/DEQ022011831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ee625ecffb329ec9a40634fe85b74c610d78ad5b9bb891682db194ba8108d7. 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/DEQ022011832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e979e2341dc7b653f09b1c22e4f9ce48b6368e25c82b12c5bd974ecccab7c8. 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/GBLPF6684425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227997b339a61c680699ab3ac426ded61ff6e92ce338c71ee4ba0e5e1b62207b. 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/DEQ022119920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d8f24d910963b66052bf0d045e3f2892ac040d85df589a5d4ea5a5b90c7094. Chain 2 (Bitcoin): anchored in block 958573 (2026-07-18T15:49:54Z), 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/DEQ022260472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af4544490727030886e0afa8f78a0db524f4aa9f236818e7974e5de2ea29ab2. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/USANG2232321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8c290ca772d1d40525062a2d5772b14b40aff05471c2bc0069893864874bcd. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/CH7812400072.
EXPEDITion 100 Vol. 33: Premium Rolling Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06ab474ac27a87041943f0511f548cda28721927e78aded70cbf4eb8fbda26f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBLPF0262153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa349dba4581fa608291114ecd07624e5dd19c222da29464bf5cce3e71facbe. 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/FR2X42481749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c3f73d8315386e14a8bad093bda59d7bb485c269bd02909864680e4a2a4870. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:57:18Z), 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/GBLPF0289143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff35d5c56e8f1c5b98dcb3500a88cf734bf2d991839f1f761b67d2b36384afcd. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:57:53Z), 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/GBLPF0262154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76dff9492457253e5e70df62105c56b4732eb5487ad989fc7ed6d4007318dae3. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GBLPF0263776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x017d619798846d5bc64cb85a332d58f1d85c382ee60fa3777d5b499db25ac18d. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/US3DF2529095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75e0e8359d94b5a4cfa47909ea96d6b78ff9925c65900ad72ff974a8666997e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZWFN2565269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb46613341e086c448cb8c36ca23c34c2c82ea5712cbfafb4aa8d49eb1bb5956. 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/QZFYW1905485.