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 0xf4d4a30f2e6bfc5d8605b9577e912d7499396c2ea3863bed2011fef0ca237443. 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/780414ed-9d6f-4530-87aa-fd728b8ec458.json and https://artists.proofprofile.net/proofs/artist/780414ed-9d6f-4530-87aa-fd728b8ec458.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 0x2f08ad879389a037ee6fa1c59b88dc8487645bdfeded5f75a8975b49e04e82de. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZHNB1927934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eba8f4aa27b7c600f2eff3a64ad7e8e101a7c0d3cf43d16e83abff46f8a777c. 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/GBSMU9635282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a95a5cfa709af30955adbf0a4603e7df42279171246efda0061be82d09e961. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T13:10:36Z), 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/GBSMU9815091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ebfb1223a81aeb53b3db948ff9a5a7a8ffd58e25b5af40780eb278388af797. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/GBSMU9815092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd991a57e38bc813f07a60f7386f5927809c843b23f693dc53ea8ac43332d9949. 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/GBSMU9815093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37846a65737373af885bc9a5d00a0a00d8e192c9adbe4e06b3aaaa756f640a0. 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/GBSMU9815096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994112cd0f8191c3cceb6d87f7ee3fd26f9b03634ba63a8a25547ffe2ccb6583. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GBSMU9815107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa990fd73644292c1c6794f4ae5d21c51faf78fc167c1f43ad55c0d086bbff2e8. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/GBSMU9815142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eba8f4aa27b7c600f2eff3a64ad7e8e101a7c0d3cf43d16e83abff46f8a777c. 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/GBSMU9635282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a5ada0bb0af6571f147442f3e907036b77ee29e90bb9a97eafe941f038e9a3. 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/GBSMU9815144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5a47053079135ab180b0878f73b7dfdeab39495f7eec9050859739c3750cb3. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/GBSMU9815145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c2ecb40c4a884e4a6c9d20ba0de0645a35023724bbd646da4b91dce5f0712c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GX3HH2166515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b75d557d4506379d4c722a9f9e75d8a01701d1ff5c9d2f8cc5fb5c59c48d6af. 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/GBSMU0017985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f26cd2339eb416a1d334de4777a60628d7bccbb1722d37629785b63a327a60f. 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/QZNWS2173389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154f6c91be0b919b5e0515160d3e04cc6055d288645efacc812d9ba19e455d3f. 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/GX3HH2204580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e67a30f7b0e0a30e8a6af9bc126df05806af8af357af9841dcb1525e7acb7df. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZMER2298665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293703b44727d1a948c71634ada9bd44adfb832ae50de7cd3d670c6c7c887869. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/QZMER2298666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9124adc372ff7127c057f116d9f2cda44d696879c76937959fbd6f018568bba7. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZNWX2271612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf435e7131f2c3b5c2299a2c7286124667bcfcfcd830ddc776b3748542a1995b0. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZFZ22362767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d54c086877d0fb2e014ba546bdf18f271cff81876d72007bdab066af3e71f42. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZFZ22362768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87fbc7a087a53abfdb3cd096b15c05df4a1475a467eef863f7cf94671074e788. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/UKZGC2303916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9bf097e09dfc7beb9f5185b979e612dd726e547615585f75b3a63078981b30. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/UKZGC2303917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9effb9cdcc88610a442aa0e8ef09cad0a2e6539221c2df68e7bdd7de7bb39bea. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/UKZGC2303918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73941f3c696562242e7219a4f9f29712bdf57c738d8289ad4dec309a4306e576. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/GX8KD2426158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139d3c157ba0adab4f75081b5e7cfb4e2177dd2234791d5985059f7958acfa4d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GX4R52434780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9ad5764aadc9a5ee7280db0c50b69e28ece8fce42b14409997c2c90c618cc4. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/GX5MX2407471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf3777878a685cddf52dc37c96ac1ca23b644b9ad0d0c8fb1c8c883f06c0a14. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/GX5MY2411827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3780703833282b4db4ceef5986660bda1330e15d4eadb722ae48c6b21929d1. 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/GX5MY2416424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce6465a4233ab434b7678a4d0802334cd6cc89fef42042c1fb2f60a01032bcd. 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/GX5MY2477375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37859354022c3555ca59cfc51c911f676f494b82e62454338fd73b59ed53cd5e. 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/UKZGC2409159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5795d304767c9fdb5238d9e2fe076f2d84f16ba7a45b763470619974ea19bdce. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/UKZGC2502935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c31fd3d0bce5488cca5815dcce3a8194e5b53d561b23d0bec3f156f4df80562. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/UKZGC2502936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46eb22a781da82f5bc160aa9b5827a11a77368eead73984a94893bfb7bb93e5e. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/UKZGC2502937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5a56207ed739bd275cc96887e250264ed7f4e549299c382da68c055224c73d. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/UKZGC2502938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc762f4c4dad4d996933bf960466dfa5898e478d06c2bcd5b55277b7b7ad38f4c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/UKZGC2502939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5ed0eeae0bc8192afe9ee70af744b4fe139d3d27af87f9800fecd83bfbf27b. 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/UKZGC2502940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e49053198ab7abefd4763351c96b3251814a604124daa5ca54eef9dec0417cc. 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/UKZGC2502941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597c8bd30f10a1b15b813917e8cf02e1cafb213d2446a89e1828da5dadb59a50. 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/UKZGC2502942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9e1b16f66ed2609102ce7cd9b948ede7f5920add70ffc477273741ff5b9bfb. 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/UKZGC2502943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a491c2dae6857d8cb0c2ecc710002fa2d45db8cf742ba2fe22df20991facd7. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/UKZGC2502944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc4d34d7ba269e2a484b5273abd5e71c57bc1077da40a2a5e43b86c4ba15e4b. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/UKZGC2502945.