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 0xade1c2ce3382940fe9154fa5d686719782adcdee2e2c7f4fef2f4e54f5bd0b50. 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/7606e2c9-f1dd-40e0-8a60-1218a77335e0.json and https://artists.proofprofile.net/proofs/artist/7606e2c9-f1dd-40e0-8a60-1218a77335e0.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 0x7ec26f4e0e803fd46d6e76f809fe14abb4058b2b07f640c5ceda6ea11d16adc7. 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/QZK6L2356556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b8b751aa66c7eaff0b0fa3106017ecb25d3c5e5aa9bf68014c9c864262bf7c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZK6L2358638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f64836bfb77749d9271261af1a2ef730a9c0b807b26d829da2ed862e19d0f01. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:29:29Z), 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/QZK6L2358639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7694a898a97a2bbe38ea00936170913580fa1437374930a06163ea434bd5b98. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZK6L2358640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867c9f8008310fa6ae2d1fb2334ed08904dc0fc0d2200f522523b6222bb0ff79. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZK6L2358641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d5d199fc55693743cdca5b16dda2c03d9aa7c1066f21e001d29cbad7b2f5ce. 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/QZK6L2358642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ba3a2979b4be8688833aaa1a85e19c51a1d57d7a17bc13c85479a9c6d21d97. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZK6L2358645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67f2bc0e592c38aaca9d0a230c53b3d1ea7623374c1c0df87612863e69c1b26. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZNMT2261369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf76c449888c465eef65e91b8a67dff930c6e91d12a4a92796d3794ba75aa2ff. 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/QZNMT2261370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e32c94a5d701f4a05da9ca512bd36d8c2b017119d3a98944c38905a9d1fa46. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZNMT2261372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7463b037c66e1b7f38324bb839fcd1380cfe93b5b7f3285dc0c7356a79af3e1. 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/QZNMT2261373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34207d575dac4c94785648127fb400869bd4a9ab45999e3276a8e834dc9c665. 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/QZNMT2261374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9dcc7eefc262cd25de3ab9ca3b57ed505e490f824917d4c2132bbd99d5d008. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZNMT2261377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac8178bb9db5ab007b1faccddb2239f273792e98509c40d57c0ef364adcb8a38. 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/QZNMT2261378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1502256b5ce21c8eddb1776dd432086d194e4e2878b474c8ae297f8b4e4aa32. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:05:30Z), 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/QZNMT2261379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161b8a5dd4c829edb05680abecfe6a388cd6a75c1fe0602f4291f4e9acaa094e. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:01:38Z), 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/QZNMT2261381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf78ba0ab67bbdda5c76b8b788543f966e7e7c48c9125ff0b485689a30c1e5955. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:13:25Z), 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/QZNMT2261384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41479cdda7f3e2859f3080e80ce783cf876878700b986c077990b8902ba063e. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:55:24Z), 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/QZDA62413964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36dcf313fb91960eeddd1e2f400685897f586415e334b79087090ba1c8898c0b. 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/QZDA62413967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72318abb02c7c3fbc5b301c549f00e3267c2643e7d181e909ee6f5e540d3976c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZDA62413977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x187b330d724413752a896c01489607f2bd81115dccfee851c61ceef56e28a332. 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/QZDA62413980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c360916a1499bdaf8aa797371852fb56b6b59eab48f813f3e6d19898cbd406. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZNN22361444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07240b5a71e0af34bead1887c7db1a2a3d2e0bb7faf7a7c5100a32257621976. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZNN22361446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b7f1af1c05a0063dc487b05c2384a9c3edc1c9235a50cab5a73b972057390a. 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/QZNN22361447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x486588cdcf95ce348d9fc96470bdda7d794a43c6ce0c363b12a7cef10753c511. 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/QZNN22361458.