thumb|upright=1.4|The Amazon rainforest alongside the Solimões River, a tropical rainforest. These forests are the most biodiverse and productive ecosystems in the world. thumb|upright=1.4|Proportion
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 0x7fbbcc028d266d86231bb2f321dcfd9122712dc9f459d36804d259ba8891bd8f. 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/63474d7d-d8f1-4fcc-b6be-7ba8c057bf1f.json and https://artists.proofprofile.net/proofs/artist/63474d7d-d8f1-4fcc-b6be-7ba8c057bf1f.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 0xff5a0ec63658a0d16a9f138251c0e9cfea9380d9e2d8da46b1bfc3e313f5b77b. 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/AUMEV2168991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92587fb51c9d2f34eea8ba790627c5628cf9729aee3f1ad96a9d2a93b609b42. 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/AUMEV2168867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41726d42240514831a801e7b0574c11cfaac9b36cc831123d6ec492ae7625260. 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/AUMEV2168994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf369b115b307ae66cbf0b5500fa331e5e50d79366b359435930ba78c839efca4. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T14:08:41Z), 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/AUMEV2169447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42cc53a267ec80f138b29ac496f7fcde82c3cfdb1366d00b09ca6abdefd1e3e6. 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/AUMEV2169571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab7a9b40794ca8ef762475d865ec8012619a3d9ca02f72e20e1b2a85d8c5fdf. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/AUMEV2169000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf106d4bd434ec09c10d5ec16604a3dbbc25559d7bcbb38cfff60787584a6dab3. 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/AUMEV2168838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ff929ebf0ff81367c2b23042694dc0c528116e95bf81d8559efd46668ff50b. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:03:22Z), 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/AUMEV2168868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e44bde327a325e86bbf13d353b95eddfe4e62527b64161880f13d1fa611b5f8. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/AUMEV2179583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0d7127aca03f9ef3804464a8d1dcb80ca61777c91d40c0a868f7ad87480ffe. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/AUMEV2179580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19a59451ad8e66709afe5ad9d6aa66d0293b6e039355351994fe5a5c5f694bf. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:05:22Z), 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/AUMEV2183150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc591f908f9579ae843bfaf4040617be616aa4a49e6698391dfe4138a43307b. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/AUMEV2183155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7152fab53a03427ed212a0bdb38196ea6f9559958a55152bd10dfb2ffe09efab. 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/AUMEV2183153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9c3066ee92cc2191777f5df45cbe672e035afc9e71a5286de124ca0ba5cf0e. 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/AUMEV2183146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3651652567dbd8cd180a7bbe493485e382e53cd1e320f12c7942bfdfcda6af47. 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/AUMEV2185567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7aa6dc87ae5b309e9b2d8d48193e4a99d17bd30b996438e2ec7cda5ab946168. 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/AUMEV2183151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34586f29560dabf65ffa6be32fcd7960b150a24ba7ddd44277399787a7de048. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:05:28Z), 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/AUMEV2183162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38ab725ab5a035bf3be77b8f1a173ba05e28d0f71e56f5dff5ed181d936b352. 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/AUMEV2292291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06a1de0d277280925dff3d55dff2a8e60e3ba39b0747f9d47c0885bae4c36bc. 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/AUMEV2206137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c77a36c79e7e5527ff4b06d9b1375f77bf513405834dc62ebb1727e6d3c47b. 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/AUMEV2206139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51eeb319713b90d06d451108d3c123b59d8d757641e2feee60309d823eb7b60. Chain 2 (Bitcoin): anchored in block 957558 (2026-07-11T11:36:38Z), 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/AUMEV2209791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b252f204b45ff66da7c139b0c35741ffee911ea9b513a5ea1d276f939dcbaf2. 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/AUMEV2209790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c32f8d261da3083f818cba85e9a57f745ef559682e0b02926e7db61c983524. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/AUMEV2215175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08b873fc3f1b15c77db18c049ce6fc79b4175ddc566e9c35f6df5c1e8393152. Chain 2 (Bitcoin): anchored in block 957556 (2026-07-11T11:14:07Z), 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/AUMEV2217652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f9ec278bf5efb97c6bcf596f724d3714cbc46ae28ad033146a4d9b5c6ccb1c. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:48:02Z), 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/AUMEV2215171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea120d702447ddfceea603c4b7c9415151773c082525b44a2ea690d16e16d40. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/AUMEV2343479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01659451dea84f45eb8a7c0e53cb1fac144ca031baa031d2c2764dd42dc2dbd3. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/AUMEV2245527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802f9d934aab8c07e85efc66ef6b8e8a7e3af1a972611e10894d3f18648b46e6. Chain 2 (Bitcoin): anchored in block 957552 (2026-07-11T10:04:42Z), 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/TCAGG2245181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a10ab859097335195a83c5441a3ecf6b6e28b6d27eddf1174d8b788fa8590d. 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/TCAGH2212536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193442d8e81233b0373954cb92caad859a8e8c16e6b9d89d776731fc755958c0. 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/AUMEV2291974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb212cb63d6015fc99f8665b7974c69eda40e5bb9c876c0cb611fb7e2e362eb3a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCAGN2288613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf61c8439ca4268053d84abfb4e6b83b76e7eb2d364907d528102c5fc0ebe25. Chain 2 (Bitcoin): anchored in block 957554 (2026-07-11T10:39:45Z), 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/TCAGN2288590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d195d4248dcab87a51024c16a87a2caca0d95f2d98d53297ce08a21a99bc73. 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/TCAGP2278578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44fd247b385094f6d35e5cabeb1ea928e21a69c6ec5984e12dabf9eebf326b1a. 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/TCAGX2396752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f269c1b9ad9e289b8851e16ea0c007f6551ca2b7dabe9932fd6d0792de539d7. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/AUGBT2344581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8107d03ab17ded3d997d34f9c727c1a56c4740cad3ce56446461837ea3f5934. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/AUGBT2444259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8b6371002cd775ca7875d63f1baddff5537b1b0059729ba5dd8b8d6fb078a2. 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/AUQ9D2404125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1160e50dd6d356ef0c26a60a980cbb19a93c8010d6d71797d1200322ec37e63. 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/AUMEV2543879.