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 0x6ac6d52b661d823dba1505270eeb668c67ebf6e757d88005da29816687b8b23c. 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/3348e5e0-f8c4-4f90-bf35-c7ef7b47ebf6.json and https://artists.proofprofile.net/proofs/artist/3348e5e0-f8c4-4f90-bf35-c7ef7b47ebf6.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 0x0e291939a3df69fc44bfdc9e5efbfe01e2143e0299bc1c8391aab0ac0ea98748. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZHN32486186.
Maria durch ein Dornwald ging (Lofi Germany)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53f11d0b15fc4cd3325de2720ef845a3a5b4b99b09ff9fbf67291658278f8ab. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZNWS2421415.
Sakura Sakura - Cherry Blossoms (Lofi Japan)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8e1a74b2bd6cbf02540ad40a8b653477bf294a307b0d9303fc2b805e9bc9c9. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZNWX2443188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b6a65b42cb366949761464988ba56bb93f04e7642da259447e039b64bbea16. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/QZNWX2443224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb565c703c7b7a2560f8387bffaf7cb2edc2e00e5dcc2de3f4fbe14160e883027. 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/QZNWX2443237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb61020966330b4eae9983e47c818763af4e2eb7ad6cb5df79dd02112705f306. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZNWZ2429674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25fcbda7109549c8476568095549cf62949fa12e9af8381d5684a6e1779abc80. 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/QZNWZ2433585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47fbfeb045e02ffd605ea88bca4bc6256b0653fe12fd0216784cb81221ab2c14. 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/QZNWZ2430977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fcb67701d61948048bdab109bc246b5e002ac32b635fd5bde76393b2982e110. 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/QZNWZ2432223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23e029be9899b514dafefeb8d3352f6661abd02e1392c183056a5481bac6925. 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/QZTB42425645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd3f1131d45b06bc4b6d6c1945ec909fdf74e80281e23ba870c6a41d365363a1. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZTB42431798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf351185ff6bb0fec1348048d4a659def8ab2ddd7cc98c08d05aca785685568be. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZTB42426170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26de97ee065d4d5830315c1c79143c726c4228b9e261381de45b6858add47558. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZTB42429481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b48aa3241f14c649fb6a8edb841a940afe4d0459553871111d5861191171b7. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZTB42431828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef88b83ee950a31d962bbfc1901f79560cec9a49186a6d35667be4b07d1b20b5. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZTB42431829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a16841e930851d11f4a0b88c7ca579ea2d32af78068f2b74cb4e458f4b82e4b. 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/QZTB42436327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57835ee417d63d121f89db1a689ea44e0f64313ec59aa49acd9b707bfa54fa2. 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/QZTB42434161.
Ein Männlein steht im Walde (Lofi Germany)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c41ff867b802e60492bdf0d768229f304f48c009d90c9c05bd16398ed8ea2d7. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QZTB42436328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb210b1f0b54a252cd9c9ecbf09aae32b7e4e636e784a65faf5d47d16e5400ed. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZWFE2409657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8583f935f022cd2ca0b9892abc4bf365d5c501742b9e4781e9f671de8ccaa55c. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/QZWFE2406791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eba8e943466575ee3b5ca7becd8f2c5545328cdbec853428b0340f9aef9f37c. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZWFE2411041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998cb27718c3d574dd102f9584c73729b756b23ae6aaeb9301d8920a89ed6f7b. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/QZWFE2411042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6117311a78af131943965732a9a16555a014aa8eadf158a7e7e674d78002aad5. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZWFE2415159.
Stereotypical Lofi Beats around the World, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53f11d0b15fc4cd3325de2720ef845a3a5b4b99b09ff9fbf67291658278f8ab. 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/QZNWS2421415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47fbfeb045e02ffd605ea88bca4bc6256b0653fe12fd0216784cb81221ab2c14. 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/QZNWZ2430977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf351185ff6bb0fec1348048d4a659def8ab2ddd7cc98c08d05aca785685568be. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/QZTB42426170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b48aa3241f14c649fb6a8edb841a940afe4d0459553871111d5861191171b7. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/QZTB42431828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef88b83ee950a31d962bbfc1901f79560cec9a49186a6d35667be4b07d1b20b5. 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/QZTB42431829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57835ee417d63d121f89db1a689ea44e0f64313ec59aa49acd9b707bfa54fa2. 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/QZTB42434161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dbc5f3f21872bd0d3359139c3b30eef9bed79bb898fd486e3d53616ae4ee22d. 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/QT3F32447142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f008bf3027261786f025c7c1175cca6e25ff2cae4948f415c2c7143b07871f. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QT3F32448921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbdf1c2d1561ca7a0fb91a99657f0d280f90d8a7d288dce041fa1675d446a0bc. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QT3F32448961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de86c67cd737912a36ec82d573a38d7e1181428755b486f51bd894233316f1b. 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/QZFYX2578857.
Weißt du wie viel Sternlein stehen (Lofi Germany)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b59351de7775eedaf0e341042299aef5a984a57c2cd54b6908d4cfdd3cc0ca0. 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/QZFYX2578881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10fd593c8a05596ea94e97ebd77e1d49304017f73f7fe1ffdd849e0341edcfc4. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZFYX2578884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2067b53474eb5f84d217f40adb44cbaf96cd0201c556798f789e91848d845905. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZFYX2578917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd796053318d5f0a67b651e91cc34b1544d9f82c0ec12c947b696cb94c35eebc2. 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/QZK6N2507475.