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 0xa110a6d395e0cf7632505b364184cca00ac7f50ff86a3f432f0d5f00a73d6607. 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/e79534b9-fcbe-4e47-854c-361177d72c2f.json and https://artists.proofprofile.net/proofs/artist/e79534b9-fcbe-4e47-854c-361177d72c2f.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 0x5da3147cebd925d6ee4c043f56556c358e49bdfe423779d53e9b15406bc602e4. 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/FRX282204207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26b6e2b6298f945afdf418253ca9e074b52c02b1f26c3d8526d3d66072bb820. 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/DGA0S2485686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64435655f2ac4f3e3c065ef92c3ba4def7f417dc101ffbd247afd57ab3bbccb2. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/DGA0S2486620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ac515dd9d2a4c5af4c8fa4cb193fbd8307176ad64724d094cbf128ad3d6eeb. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/DGA0S2486417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85d224eefdb5db09c90f6f99a9495cf2229ca55668e6701ab160f86c0d17758. 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/IDB832407392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c89be471e1ed6706e55235fc3fb543f87bb5e60aa96450b1a9004fbedc3279. Chain 2 (Bitcoin): anchored in block 957668 (2026-07-12T06:54:37Z), 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/UKRKJ2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e8a9c4abcc784a169e8a3f982b789158187b918348cef124ed5da1d57c05d6a. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/DGA0S2486418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e08bd354dc50c66000b3ddb463cf96d1a2ca07f6540099d11a34d593ccf8f71. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/IDB832500249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26fb6c34d8b14d56bc7e45e06d3ad8eff1a519d3f222ff9f71727a0285cfbc9. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/IDB832500456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b1d82a1350fb75876c182b90397302205163c8624c83f8458e1119faa6c8a8. 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/IDB832500507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24631fd86a079f95ba4662dee30b360654a157d3567733f5cd7ac01c707d9302. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/IDB832500529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33339b5f46154f72c1623a920efb618eb015c5f89236de578c354c9b5d9ba6ff. 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/IDB832500536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee407b518dda09c17e0563349e60c5c724ebfcb70f867025d294e9bd6ac021a9. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/IDB832500540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd897c4e632c6c7098ab49b5e0056aecb7a6960897357ad8a2c9ae35298a1c9. 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/IDB832500618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7aa77a7ff6824ae822d68735e444547571bd786dc7bb10d20289f7639acd9a4. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/IDB832500826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d76c14415d712f482a0aa980c2734252a411cd4fc8f47d626ea4d7500348a45. 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/IDB832500856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7034eacd4f14cb2cc74700c69bc826d85f82dd4ff8fd6036acf87ce2f9ee2a6b. 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/IDB832501085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e83dca4feb7a3f8d2b346254c969c988d7d52aa3046ec9103acf399f70ece2. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/IDB832501199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674e54bfeb5019613720a4d741b687618a0d2ee5748bf025ef1b816fa23d01c5. 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/IDB832501185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfacbf4cc3442bdb031ea92044c07a8b08bb85928784338d234613f8332e3e89. 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/IDB832501306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b96425e2123d6a490431f3fc68bff3028cbfa4cac49524ae4e6761592c0dbf. 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/IDB832501356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7685da933f45605ad96c6184fe7f5d615c89910dee1a503f33c700004131609f. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/IDB832501425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbadda13972a882da93ec84b91e766f1c64867e8e29279a5205fea592a4a9ded. 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/IDB832501569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2d46efc0b38c3fd228ffdc97b322510a91533e9ceb61c0627bd44df1d08b5b. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/IDB832501568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a9460e300277928c995da1f70f75561b0454302faf270667552a0eb117d0fc. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/IDB832501779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9682cf15f1e714728140d33dace2f1a468f35e5e80715c17ef77a4ca059f8d5. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/FR96X2518262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ada982dcbc91232fba0b4cc4a2f73758f275178e79e386785790dbccb1e300f. 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/IDB832502621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1108e2fa9988ab7bda7e3ace568ebf3735b7b0930c6b3730673176f4875b4776. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/FRX452518502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f7bed754c12d37e63bb01855993503c16c0efd1c8d95678b36ea525f40874a. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/FRX452509765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8176a399279645fb6fa8f214fa025572285b1686c6212e48db7f38b34cceb74d. 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/FRX452526804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152d755ab141cced18b62804976bcbf330acd8c3aa165e23f9a2a5144b825d3f. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/FRX872521587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03916c6f88ca5649e91cde4b746d880f77900c13c5c2598d3eeb567fe8e70e2. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/FRX872530999.