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 0xb9738dfee9f8c7debaf0ae18c299413af3ed471abc60cdc61bdfb9b25bab4614. 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/fd4c85bc-ad31-46e0-b21c-a051954c1e0f.json and https://artists.proofprofile.net/proofs/artist/fd4c85bc-ad31-46e0-b21c-a051954c1e0f.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 0xf4bc160304732fb1764d922ccac0e5cd58494ce61bfe107a483c1f217742a4d1. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:16:17Z), 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/QMBZ92193301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b4d565efddaf03646d24f4ab85c2305f745082ea398cdedbaf8b9e6e3c43ce7. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZNJX2118741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2654ac73c8ac88ae9a922b5af08ffe14b8b69ca4f562a1dd17952348764bb844. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/US7VG2205164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c99e721d855cf060eefcaa4708a215ef6dec4c2ec0ab5453139bb559222543. Chain 2 (Bitcoin): anchored in block 958678 (2026-07-19T05:59:57Z), 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/QZHZ42215993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa63c08331620c89db7c448c24380de2492ce81fb7fb6d6ab0364d236f9a507ca. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:10:46Z), 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/QZHZ62287622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0bd14de9d4e5871d557aecc457d8d696a827922a3fbbe8eb9a5639a0a43dcbb. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:44:41Z), 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/QZNJW2285639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24f337bdcbf3658098d3adace8c5f9b31cbf8f4b64fd403166793a52f23f121. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/QZTVM2262745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4084f3ce0dc642cc85149ac99efd7df3a27fbcaa81bef9f04160f34ddf20846. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QM4TW2370227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a288c430df34addfea020ca0c726263bf71d9d69c52cd4bdd45dbc7cd3a6b7. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:11:14Z), 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/QZGLS2353280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc625f5c27e9a3a8c7d66c6e81e1a38477445a3de353d98282b9791cc9bc84051. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZGLS2385565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938f185a0e30f55c0239940a43e88d0309a5f4fb453937bc20cd0321ad2b6268. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QMFME2328838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e68357e37ccf4b8aad4f04b5d3180145142dcc1e9a25e9388c6c101326235b1. 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/QZDA52414911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53120f7b5d84166d3dd1d833054d9652aa6089490d35f62021adbe08d0b5d7ff. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZ5AB2425720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78e49487e9434594ee7347f16901f48c689482fc447fd2fddf0cc5c7b0e1547. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:42:06Z), 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/QZK6N2457130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3d36b4ab065b3a6e7736ee2556d16f820c883746fee38bbda8922b5a35d8c6. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:20:18Z), 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/QZK6N2457134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb9bd6656adb5382faf382971b933b950e89e956ba38994e6909e9364b8e67c. 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/QZK6N2457136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3118abb5cadc984cd93c5ea99dbebb3973b139dd4cfaa53b5e0be8253761733. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZK6N2457137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e9198bbdebe981a2ce42cd567b5ccc2c63c026e0045775e4900122195f75c4. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZK6N2457139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76adf6955c8a37dd132521a610ca14834f8cfdd5ad81280eb4eeb39a53ebaf7d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:59:37Z), 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/USLD91766705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e663ed84966a97cfcee37d901e6b3c7cf8f5d477ebe8ba0d366c2270b464953. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZGLM2560300.