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 0x5a4e5b537bce5d8faacaa23dc6de2595b693687fc5a5d546ecf4b45f3be4bfbf. 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/69cfffdf-f24a-48f9-8613-98284f663b6f.json and https://artists.proofprofile.net/proofs/artist/69cfffdf-f24a-48f9-8613-98284f663b6f.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 0xb21e25bdaf929a8640ace46375a86a36e8dbc3b1c32e1755c8052e1562e0a11e. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T08:17:14Z), 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/QM4TX1991497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3efa03e67ddc0ae26689f397c7e3b6bdbf453e9db6c92db5f598ede0ef1cfa32. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMGR32215616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc285125fdcbb56aa34825bb7f26014b72277e6106390ef09963c81712456837. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QMGR32215612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdcd7dc093e65382f6afa3c0df9aacb5c5a48931d8a771a60b5a4a356b2b8b28. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QM4TX1876237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1877fc8e725dda56198972c3e11d27e2c465595dd0e743792b337ad45f19da4. 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/QMGR32215553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c033aa93e2c7e03df9a4c014da81ab259fd6dfbfd2e795ffa04aaccd50fcd3b. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QMGR32215555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c91760856e221eca790839d920a5704781e1c7d45c93469d8f5bcaabc4384ef. 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/QMGR32215456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c6d6718374af7c72475582bf28fbab28ad2e620f849dbcc73cca7a54c948d6. 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/QMGR32227874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb902b3dbe2f95f50407226f9680167a86d258156bca7fd338e13cb7dedc15028. 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/QMGR32215557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a156d5e162d9b3bb61263572e0c71ac195e7f8c32af589e7ba5894001080a6d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMGR32215602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069bd7373c61eb5897dd06c15e12b3a507be049be66c9fa514444136d7749d6b. 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/QMGR32215623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff18f885fce8fb24bc3943330829ccb7a473c88227db3e332ee425891fe9172. 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/QMGR32215445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee157d92ce029a80b507a11085cbe655eddd1fcd5c4440cc9427f72eb577d4f. 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/QZQAY2128510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5259e537276a9d05391e27b20a3d0f4db54901732e2d6525a0a32ce8cb603327. 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/QZQAY2145966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660b0f1ef40a64542d7846137faea9efafbcecea68d35fd68096e59df50dbf0d. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZQAY2142486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8f2eec14ce367726d953a68dfbb67a0359a3377928d2e59c16bcfc371d6b25. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/QZQAY2106818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ecc73f963abc6eecaed127ec06c9279435dc8527c5db5de77b0a680ee55df9. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZQAY2103019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b8d5276972b9b628ae9617754c947fbedd285be65983ccf131ed08669dbeac. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZS7J2190614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234f2b71212ea20df45286ebc22ecedc419cd8bf6591170e84fb06dc42a85f91. 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/QZQAY2188911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c9bb6d633dd1d414f062d9c3b58b271fea32d144dda11c1df249eacfbc2200. 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/QZQAY2152324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449c7047fc5bb48d29d4ddf67daea1a3f303382a6244aa8d70cf18fd91c2998f. 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/QM3DF2168397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57eb777cfca78d12bc22c8393a40e53543ec3eadb05c22ada1561c7371683543. 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/QM3DF2168372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f22f58c5896289cd4068a7a4a8072225094033c902faf18d9d77d577fd778a. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QM3DF2168381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432089cb95ac0648c490fe92a151aba4b5ff5a3cbab4cde1f7925908cd65d976. 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/QM3DF2168384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85709f2788706ec051090e41cc9776b371c3101661a865176a2c7a6b3c3e80f. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QM3DF2176830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad65af8e926e5c8ecc8580cb48f39105dcb050ed3b557230a89d645fced751f2. 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/QM3DF2176831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803bb95092ba454d1564746cc9f43ce44eff1c3b63256b9cb7139766afcad3d0. 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/QM3DF2176834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a00180ab3ce9b8fcdf762452c97541b30f609406191b1c227407d099abb5e4e. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QM3DF2176835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9fc4e3a3481e1e20ec137f49edab74ac7d30845fce3126fabcda7aaf4330a14. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QM3DF2176836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceabf30bd127740903a5840d1b1302fc6e3a9bccc4e4dd207e8c9a7814af96d5. 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/QM3DF2176837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c97f5525ca55a7aa900051abe13c52369a993fc8963b91940fb4b1f7590678. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/FRS182137592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60bab0b049da75c396f15a6c4f481f53a01247b0574d3ce418319452ae878952. 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/QZTLA2241750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b61bce5b0c20cfa4ea0f3bab3085f9e56221c1545dce5930b052190f29bec5f. 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/QT5M32542372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786ed1db2828bcd9602042955cbde06aee76b2a68b8bec7b70773b8f24ae2ec0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMBZ91708682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858f491c2807661d96293a0d0b796efa06a6f68de65cacaa6ba673881065373e. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USLZJ1949494.