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 0x363021675b9f076eeba90274da52a8a8d3dc2d3dd79d3f6aa3fc8cba0a0667e2. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/50fb9b90-2323-4bfa-9bbe-4d5e46d411ca.json and https://artists.proofprofile.net/proofs/artist/50fb9b90-2323-4bfa-9bbe-4d5e46d411ca.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 0x7a22abe4e4f0f64c2b8c45ae9ef6bffc0b6d3f6cfa1c13e0eddede7397de9929. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3FA2554218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb85611149657741160216fb72a9e1d2a0ff08231e6d8fa458e3ef1f693dadfa. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QT3FA2554245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f009f426c840701f81ea465485a2dd208293ab92373402604e2018455be19b3. 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/QT65Z2544896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe875aaf21f031e28f33cfa02046eeb93316c612ce063ebd75b0b521f37e6cd0d. 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/QT65Z2544712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfacb812a7ace554f5e676058f7be00cb4e4f71215ccfd44c3630debe26b436ce. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:04:24Z), 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/QT65Z2595783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48a8ac432b49726ea2709cf5ddea421bf6e56d4dfd3dc3aa12641db80cc06de. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QT3FC2509951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb1d191f6dc2fd9e9c49eb72a8711d1056134a9cafb49a46135ae1f836bc831. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T09:41:27Z), 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/QT3FC2522455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef506db2dec9961187f245707ba5198da2f8cf1b731999273ea087da08d66e48. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QT3FC2522464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77012d01caf03b6f8d6043cc72cdb5290767d2ffd3053c9265752e545a05ce8. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QT3FD2588352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91eb7aae42107164a900e9e116b44909c6048e9cb5aefa3f07fa219a7d9d25fa. 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/QT3FD2585823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f8f75f4e0c4c452839bcaf87a9a3e6d2a73425f08d5a5e498897a10eb2f87a. 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/QT3FD2588365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x872c4b6f423e3f27003836801847caf759e16e2e6fb10bbc54ff5cdc4a00cbdd. 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/QT3FF2505701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e612231563425fbd20c22281069ff556f30b20f8d402c3728dc1ceccd51385. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:20:22Z), 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/QT3FF2502060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b88516cfd5cba4ef977296985fcd08400eefaf6b8f5579bdef98605dbb20735. 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/QT3FF2534245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba2f241bd289d3740224907b8a5e3e0739a8a0286807b14b50933adb4adfc5f. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:21:38Z), 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/QT3FG2529091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ee9981127099696ec10cebc5d0a9128a8cf7e442fe37eee82cbb5a61af2811. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QT3FG2531323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895d317b39b1d07f7b5794950af8beff23927cae3553d3636ccf38bd7202c779. 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/QT6622534112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ced9d5331315a9ee6432927656d2a74e96ad716662e7292d5d103f464b10c26. 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/QT6622534084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4ee54d9c32bf885d0b6710d71c5b6b17fafa7749eaf97435eff8a131ae60ad. 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/QT6622534059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38063b70d92361b39769caf42a4621d9e86b70514a1b05b7a34649f8f84bbe72. 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/QT6622569116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27bbbcb279382da797d52f6648c4290b36074ba002438ee3d71f3f9973da57f1. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QT6622534014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24bb62be89481b0443370fa7cd80c790476086dbc96fc576132e1724607157d3. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:45:55Z), 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/QT3FH2534297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6211df5763e9b3eb5686d83a83527ec08002aba1dc62e61e1d763d6f89bb4cba. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:04:34Z), 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/QT3FH2536871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb1fb729a6d708006a70f988f2794002eaac989958d117d342810544c346f720. 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/QT6E52536938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163063e0dd83d95e007f46afce0a70349a49acc3b948e31054ee96551a442fd2. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QT6E52534574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1b9c4e063247034bf65e2b7ebefe6541db9ae80071df084348dfbd985c37b3. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QT6622569098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedbcf636014a078038f27c11d1e89a9ec0dfb6bb50151a6ae861184391faabf5. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QT6E62536632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b9b0c72800bb01bf3a0f6d4f9fffad725f0299c2492f1a70078ce5b96cde12. 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/QT6E72565965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163442f92e025f2819931573feb4f6bdec1a37b52c52b5e0f2fd3ba8265826ae. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QT6E72563840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643ed551887685103df09ac9a58a8f3121f803314df86fbdfceed5c8ca7a2174. 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/QT6E92516132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6afa271d20b537a0ca64543198428067eda8fec13ff0172338d49c3c777296b1. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:01:39Z), 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/QT6EA2531886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41788f29a44026483f215afa3f5dc99c4880210b0d8ace62f45d9f279c0bab3e. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QT6632513207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9864f1bb1c99223822bc9be9f39e8bd37fe564fde025e79a3dae06031d98823. 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/QT6EF2501600.