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 0x8f292874014442d68c9e744379f158c8090068f8a5f710f5ff9645238d531d84. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e2a3b669-19ba-4de2-b573-51a6627eefa9.json and https://artists.proofprofile.net/proofs/artist/e2a3b669-19ba-4de2-b573-51a6627eefa9.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 0xc52c05a1d3c3057e3c30f6800d46bcbafaf42c9b6076c05d858bf23ad987249c. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/GBKQU2108659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573f8eae5a5b9214bbbfe2fe9e49d05f584489c6c46bc704362d720ac4c6afa8. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBKQU1854874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6b9ab793c49af239ec8b2519232300bb58691602c3da2fb30ad7f9309f9748. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/GBKQU1635833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c77208784eb716a2fe59eb8ab38af08cda0a5ab495d779e447b15e66fd6af8. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBKQU2108673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22379de4af34f150065e09a9a46c55066261fc07202d03311a98feabd57b2d4f. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/GBKQU2018827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f93a753a09aa671b4e5d2bfd2e69ea108192a9889e7299e4b37223aad92b49e. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/GBKQU2055384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d78584ef612667672a514ac3350af109a5e4a571593e0e53e025f5e1e3f96e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBKQU2055385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda0a8968715f9a3232e4a263c8034a905c2e96018ac3b74eb3497bde311f98ac. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GBKQU2055386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe995e5308ead72f1670956a76bc73b8f6d894c6ea5e129d4aed8ad0ccfa552a. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBKQU2055387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ed3d583fcb7ae773d121d497f18e839e6dc2701f34e9be5a6a8b5b01c3fdaf. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/GBKQU2055388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a2bbf8993989edad8867cefc1d8c7295f4d6fa451a00b45d14cf7448414981. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/GBKQU2055389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a05e53b87fb7a70f8d2a111813751b5bb56acf1c7df2f2bf7c3bb47bfa953b. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GBKQU2055391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a81dc7017246639892ef0f00d169f1559a20eb72ade2aa18ab45183ca917d2. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBKQU2055393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573f8eae5a5b9214bbbfe2fe9e49d05f584489c6c46bc704362d720ac4c6afa8. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/GBKQU1854874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6b9ab793c49af239ec8b2519232300bb58691602c3da2fb30ad7f9309f9748. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBKQU1635833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d08ffa5fb70e77ab2c758209e5e4d54102705d92a6a7698a36aa1ff849e692. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBKQU1746091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x821023008f97c8000097ab66d1e38e70ae020e2d4d38b66adb4933a2d8b43c77. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBKQU1781279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1463c0933df81ec3f644d9746f27e3981db3b954043dc89880eca04dcac0b7. 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/GBKQU1968208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x280deeb97a4ed2005157751fe5d35e7c5d1d903cc261639403921a09f8818e94. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBKQU1932261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45b582f3db20986feaabe9bc54902b4d8253cae138a25a7872bac47ec864002. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBKQU1854873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x509b4b7c10516ac4847777335ab1144ba35a7af250f8fdda86961d8d05b22327. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBKQU2432497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd332e8d1180f41f3e2894d8beb9eb4a688b9e1d7a4aff3bada2a6f17d1f91d1e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBKQU2401522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2689b32107a407aec35909c13e604c1d867428821fbebd70132f5e474d4f734. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/GBKQU2385531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2728e40345253a091f62563c56bf8d88f9ee3485a20929cac2d98929ba5729. 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/GBKQU2284138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1e1710cfe2d50fc8043ab6ab46a92ba8c9cca3ad2c5b819518b6a515998db1. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBKQU2284557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b0522a4f7daf23e7ce23a7051498eb23366bd0a7b606d827594707fa08e296a. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/GBLV62114056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c77208784eb716a2fe59eb8ab38af08cda0a5ab495d779e447b15e66fd6af8. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GBKQU2108673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52c05a1d3c3057e3c30f6800d46bcbafaf42c9b6076c05d858bf23ad987249c. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/GBKQU2108659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a251089e7ccd6508f680f159b4abb7a42c5886ced37a5562f9bb7d18741279. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBKQU2103680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492b08b355e9275a6680d36bcc05fdf8141b3a1719e04127b3798211ab60ea3b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CA5KR2109944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0903cc92894d283bfdf433d3b59f28846d2f175b568b791811a2df786fff6e69. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBKQU2073337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b1b94e9a3f0963a4ad57d03c1824d2eac2ba11ab7dae7288888641a7db9f8d. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBKQU2073332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x096fd956b4389c7976b3106ef789733f64652b35137f69efa22bbe60c03d1c47. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GBKQU2018896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3332273de58d7f8bbbe6c9c393c3d715f2b828acfd383210687c5f999180040d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBKQU2000622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9835751f0b71b75ceff6ca583cf3cf3030b77804e597dd750933f9282afbec. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/GBKQU2000621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e5d23ad3a670d7e6180b94dce329769d0963bf3c510395b048fae24b9eb1f8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBKQU1977636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b188d4a6b3d9b202fb0fb381a65f124165f4d6896fe8c3671280295ba815cac. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBKQU1977282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x280deeb97a4ed2005157751fe5d35e7c5d1d903cc261639403921a09f8818e94. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/GBKQU1932261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5db18e9afe1acacab6c6bf3732fd2bf7fda946a976e486a7fc980866e4b9346. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/GBKQU1932247.