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 0x73769dffcd0ea5a355ea46c8a85fa1bd0b39f63a3741a6f5d7537668d072fa81. 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/fcc2a5b9-1ffe-47f5-a3e0-64cef9024901.json and https://artists.proofprofile.net/proofs/artist/fcc2a5b9-1ffe-47f5-a3e0-64cef9024901.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 0x9063a63531618246289f62d71010c9c07e7fb7eb72c4d6ac7f3aaaf8784028ce. Chain 2 (Bitcoin): anchored in block 958572 (2026-07-18T15:47:37Z), 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/GBKPL1413045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1167b6b9a15fbcea33a0c85960869a92e69bd0ee15be56fd535fc5d608de6f53. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/GBKPL1413046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a8aedb981bd329c964ed3d6fd0999845be0f8e627840284f509953bf2dc544. 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/GBKPL1516492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c93ae34fc200a35a7bce968747ea91c7ab664c45ecf2093c5b5c722d6da651. 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/GBKPL1516493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01457197b12a12f148ef78ed71268ff5bd1944611d56b809bf71e2057489a61b. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/GBKPL1516495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa88514e4503c8d007dfb89f86c58523372d8df7a82c49e800c9d74719254cd24. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/GBKPL1516496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748167a04e6e3f053c83aa252ebe403e91f77a0a8c35740501963d2e6c0f27f4. 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/GBKPL1668045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c58e8a13d90b4d8e22f72ef636f51f984bf50b818bfbee39ab8e09449a0e047. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/GBKPL1776945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e2d749631b75ca1360944abc209a86846a0cb433aa5541123a4ee434cd7715. 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/GBLFP1829489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b110d14b4f9f000b3140bbac0728d99501d55f69167d9f682cdf75c0891f082. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/GBKPL1816130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64fc0aad8042199729a903a9ad25e8a8ec4f04dd11084e4f24660f0f0a3e5d81. 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/GBKPL1936130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d758e3eaa9cb8ea4bc03557708dfeda240fda12e22bd89ec3cb77c9e817e2b. 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/GBKPL1954877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e318b96b4b5949ed1054085e59f890560b90b74741a3032e3e79e5a33cae2c. 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/GBKPL2091445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71488478048e3724b356437a42e7a4c50c534378e4d28a57877970fe06a79587. 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/GBKPL2004468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3f05730d8fb9fd476bcbe014dcf1ec302834effe344748f2773530f81d357e. 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/GBBGL2006408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5187ea350dbc676ae053d5b78e1a85d550fd9160f38572071ed4910360d1951. 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/UK6KW2100559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe30c25c3d048306096b7a4de208a62f7b61a62734bdf2e499870df16be1e00a3. 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/UK6KW2100642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb301899e80b19d59954ea397a6928bbff9c89d2bbf86a099cd4e21ef9603a29b. 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/UK6KW2100687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1fbfe077e263a7befd1504756dee2854f132c60640c9cd8cf90b1a47fafef3. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/UK6KW2100688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91122fbfa18fe0652675901cf2d4286f57059853f447116264b7684c1d063af4. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZ8GX1701876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe938bfd4b0a99fb6df70c09fa56fe544aca856a1d7d5e80922a8c3067cc79ece. 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/QZ8GX1701903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a56fd69add8d2972593fd673539b2239e2a6d992b3833202fb5ca84b07a0344. 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/QZ8GX1702012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04cd639b67c4400d3b524b64de683d1af3fd60beb3acae8dfbfde13c931b7261. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/QZ8GX3702023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1cc342db1768dbbd78c090b7c1a79e089ecadf3acc8a45c02bea68facb03868. 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/QZ8GX3702039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ea5426220b32f956f21ea298a4b3e2cd1284a9585d31c1facbfa3d0fe24cc4. 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/QZ8GX3702040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d08e071ab0af4ea4da1cb2b34f7cfd2d6a6286e0e208a1eecd304d3bdd0d41. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/QZ8GX3702041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e48f8eb701339abace0ee2f9428a092d3246d39dbf8e5daddf13557fb054e7. 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/QZ8GX3702043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x062b307115c30b0c8ccf2d5b8edc34ebeba4bf056c82c7a260e933cf14aa077a. 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/QZ8GX3702044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf6fb34efed846dd49a68dd4a712befe6daa0d0abbac467ccb0f65d1616bc5c1. 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/QZ8GX3702045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5608dbae1c6715176e48f4f18a14197b09931317d08acb4725130bb93bd2853. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZ8GX3702046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0ec9129c2ff8383aa85a68c6d7bc9437a5e0c8d5a274c5c0b21e694296c185. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZ8GX3702047.