In politics, hardline or hard-line is an adjective describing a stance on an issue that is inflexible and not subject to compromise. A hardliner is a person holding such views. The stance is usually
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 0xc81d6038a399d651cad487ac1bc5d008b715628b860bcafe9453870b991b50b1. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be7a0661-d1c8-4b0c-a638-310fed1a3d93.json and https://artists.proofprofile.net/proofs/artist/be7a0661-d1c8-4b0c-a638-310fed1a3d93.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 0x752ef5cba9e9e225b116715bf9a777434fc84de061c82a010f1e5e9383e69138. 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/USMC19137723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275725ee59073bb13614eef8b36ba48e44ca8cd42a8d7ffcf4bdb89d19dff4ea. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USA370512770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa413837cce721d91d9368753018e1cc035796c48bf50910dff65cc2d861d9b60. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USA370512771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d4ed97cc01e701ebbe26f890570f567fb74f918bce835d7a25c45f9c0ea3ac. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USA370512772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656a6c05f149e9d43765c1504fc130777ab944a4b583c1891555884cb2c7c188. 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/USA370512773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9926a648981fa86bd95683d5c0bb6a0c7a6b9607e94601e2580d3487ecf8619. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USA370512774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf45442f0a50c694ae205412733d7b1b2a1e323170eddef345bc4b519f9a386. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T13:08:27Z), 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/USA370512776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca098da1bd14f964f7a2ce1b4b41d306e1e9b69340f90cdb9f642677a59d4ddb. 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/ITG270900087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8917e45d8152d67a66242af26d47f5317a08712baefdf0c3e079284774baf4b7. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ITG270900088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f9eeb7a08867a51f0dfea65b569eba3df353dbcb411e9adab8150acbf6075b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:07:12Z), 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/ITG270900089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5745cec46602edcfe4da98e3d97a29f5ba6661bdf9b16edaaa32bb98eca075cd. 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/ITG270900091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be9636e7024ed140760e5b3d0b1b470e85b26ee9e238c1abcafe2797c52ba24. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/ITG270900095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc463c389f4cdb5fee21d57e585c11cb10b2e82d17e7013ec287e7e2b9f909425. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:46:31Z), 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/ITG270900097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7555bde333ae1cfe36214ea96d604fc01e9be8a86d01bcadd0c92eaed21844a8. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/ITG271200181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b7690aed1eb660126e19881ecd5a178047a4981ec11c46796fc019b8796e91. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:48:33Z), 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/ITG271200183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d31482ab3430268c79109011614b182972cefc55edff7f5044e766d22ff9eb. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/ITG271200185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6648ca36c916396e3b6bb076a1e8a55d0b43521a36c1aa5532e73ce5ab385062. 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/ITG271200186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8d80a1be4a10f047a2b47b49a96b3276c7cfbedac4139fb65849c81f0ba2ce. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ITG271200188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f0b7fc00d91d5154141aeaf1fe8b2d6a2573a3960d2c73b8b645e9ba4eae2d. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:48:20Z), 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/ITG271200180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7555bde333ae1cfe36214ea96d604fc01e9be8a86d01bcadd0c92eaed21844a8. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/ITG271200181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d31482ab3430268c79109011614b182972cefc55edff7f5044e766d22ff9eb. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:00:46Z), 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/ITG271200185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a72e9629f511aad866b5c79cdab42e1f5c4949cfc785c175471decd1b8a046. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/ITG271600537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a5fc98e65dd0b85daf413c56fc3c2bad72bbc2544161638c1f70045656bf1b3. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/ITG271600538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01602d100394656b1c6b605e96c10afffd9f022bb0b0f9f5432b5cd3395ad55e. 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/ITG271600541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a637bfe8344dc11cee869051c1b1d001eca567d81774a6b3747b175c957a27d. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:19:44Z), 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/ITG271600543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5412c8f22eeaa7c813bd795d1a1e69e39a6c4020ecfc6d8cbf669b4d10469d. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/ITG271600544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bce5a621198879fd640dd0c2de3b761d021ea11f3c73deb8f543ab700bf9f72. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/ITG271600545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5120a97634b6dae0147242409859375830b0b1b6bfde0212d394da013bf5ab4c. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ITG271900613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33022154579f16b30686a1ae11ca132a5aec43e5ee168f299b63e7e1494da50. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ITG271900614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277f0d0b6204bf42a459cc3505c937b2fa89a9893d4cde341e9af6a11d5f59bb. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ITG271900615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63a3e8b1f5e738cda993a8e175945350fa7cb93c2ccf33d7d3de6e1c3875b5f. 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/ITG271900622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecafe1d2f49a032fc676a6175e2a1ea219270701571e02730b72f47b1a857360. 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/ITG272100830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4706a1a8b3f2bf0cd47dcdf81d8af33a4147dfec2790a60d43b5ddc4df4b299a. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/ITG272100831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4255a44bc9d51e45ec62c5aa8d1b38177b8daccb06a5feb60361e1c6e15464b0. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/ITG272100832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ad24a4e04fde6667bc73c30a562b72d6e85f6758c3c7964990ebad8ffec0b2. 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/ITG272100833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01ea8ee6e7a55fefb14c0a3f77b2e2f2c6486dcd6463f4231a72817c6a2917d. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/ITG272100835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x151bdbdfcc0a26a9af9c3c38cee77096ea602b85808d54599a3bc69ea8084374. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:33:14Z), 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/ITG272100836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd64007845c78e8b31a4924529c87a4ae73e9ff420480dfc9ef31b802e405ad96. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:03:21Z), 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/ITG272100839.